Composite material for indoor air purification and blending process thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to a composite material for indoor air purification and a blending process thereof, the process comprises the following steps: periodically obtaining first viscosity, first shearing force and first dispersity of a third blended fluid; determining the qualification degree of the blending progress based on the first dispersity so as to determine a strategy for adjusting a preset blending parameter; and in response to adjustment of the preset blending parameter, determining the working state of the heating assembly according to a variable coefficient of a preset regulation and control parameter variable based on the deviation amount of the blending progress and the target progress in combination with the first viscosity and the first shear force, determining the working state of a second mixing assembly based on the condition that the working state of the heating assembly is independently adjusted and does not meet the qualification requirement of the blending progress; in the blending process, by segmenting the blending progress and periodically detecting and correcting the deviation degree in time, it can be ensured that raw materials complete accurate blending of the composite material for indoor air purification according to the preset blending progress.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer materials, in particular to a composite material for indoor air purification and a blending process thereof. BACKGROUND

[0002] In the field of modern home decoration, high polymer materials have become the main force for various decoration applications due to their diverse properties, strong plasticity, and controllable cost. However, as people's attention to indoor air quality continues to rise, harmful gases such as formaldehyde continue to threaten people's health, and the simple decorative function of traditional high polymer materials has become difficult to meet the demand. Therefore, it has become a research hotspot to ingeniously combine metal materials with air purification properties with high polymer materials to create new home decoration high polymer materials with both aesthetics and functionality.

[0003] Chinese Patent Publication No. CN120484477A discloses a polycarbonate / styrene composite material, its preparation method and application, which belongs to the field of high polymer materials. The preparation raw materials of the composite material include the following substances: polycarbonate, silicon copolymer polycarbonate, styrene resin, halogen-free flame retardant, poly-nitroxyl radical compound, anti-dripping agent, antioxidant and lubricant. The poly-nitroxyl radical compound has at least two nitroxyl radicals in its molecular structure, and the poly-nitroxyl radical compound has a flexible carbon chain structure in its molecular chain. It can be seen that the polycarbonate / styrene composite material, its preparation method and application have the following problems: During the blending process, the blending progress is segmented, and the deviation degree is periodically detected and timely corrected to ensure that the raw materials complete the accurate blending of the composite material for indoor air purification according to the predetermined blending progress. SUMMARY

[0004] Therefore, the present application provides a composite material for indoor air purification and a blending process thereof to overcome the problem in the prior art that the blending progress is segmented, and the deviation degree is periodically detected and timely corrected to ensure that the raw materials complete the accurate blending of the composite material for indoor air purification according to the predetermined blending progress.

[0005] To achieve the above-mentioned purpose, the present application provides a composite material blending process for indoor air purification, comprising, obtaining a first blending fluid and a second blending fluid prepared by a pre-processing process; adding the first blending fluid in the first mixing component into the second mixing component according to the preset blending parameters to blend with the second blending fluid into a third blending fluid, and periodically obtaining the first viscosity, the first shear force and the first dispersibility of the third blending fluid during the blending process; determining the eligibility of the blending progress based on the first dispersibility to determine the adjustment strategy of the preset blending parameters; in response to adjusting the preset blending parameter, based on the deviation of the blending progress and the target progress, combining the first viscosity and the first shear force, determining the working state of the heating assembly according to the variable coefficient of the preset control parameter variable, and based on the fact that the separate adjustment of the working state of the heating assembly does not meet the eligibility requirements of the blending progress, determining the working state of the second mixing assembly; based on the eligibility of the adjacent blending progress, determining the blending correction rate and judging the eligibility of the control mode, and based on the eligibility of the control mode, re-determining the variable coefficient according to the variable coefficient of the preset control parameter variable; in response to the fact that the separate control of the variable coefficient does not meet the demand correction degree of the blending progress, re-determining the environmental pressure of the third blending fluid; wherein the first blending fluid is a mixture of modified metal oxide powder and first high molecular material, the second blending fluid is a mixture of modified metal oxide powder and second high molecular material, and the preset blending parameter includes preset feeding speed, preset gradient heating temperature and preset blending speed.

[0006] Further, the pre-processing process includes; the metal oxide powder is fully modified and divided into two parts with a fixed ratio of a certain amount of first high molecular material and second high molecular material; the modified metal oxide powder and the first high molecular material are added into the first mixing assembly at a first preset temperature to prepare the first blending fluid by blending at a first preset blending speed; the modified metal oxide powder and the second high molecular material are added into the second mixing assembly at a second preset temperature to prepare the second blending fluid by blending at a second preset blending speed.

[0007] Further, the process of determining the eligibility of the blending progress based on the first dispersibility includes; the intelligent system obtains the scanning electron microscope data of the metal oxide dispersibility in the third blending fluid in the second mixing assembly to determine the first dispersibility; comparing the first dispersibility with the first preset dispersibility to determine the eligibility of the blending progress; based on the unqualified blending progress, adjusting the working state of the heating assembly according to the preset temperature adjustment amount, based on the fact that the separate adjustment of the working state of the heating assembly does not meet the eligibility requirements of the blending progress, and based on the fact that the first dispersibility is less than the blending progress deviation coefficient multiplied by the first preset dispersibility, adjusting the working state of the second mixing assembly.

[0008] Further, the process of adjusting the working state of the second mixing assembly includes; acquiring viscosity data of the third blending fluid, determining a first viscosity, judging the eligibility of the first viscosity, acquiring data of a rotary torque sensor measuring the torque of the screw, determining a first shear force, judging the eligibility of the first shear force; determining the working state of the heating assembly based on the unqualified first viscosity, and determining the working state of the second mixing assembly based on the unqualified first shear force.

[0009] Further, the process of determining the blending correction rate and judging the eligibility of the control mode comprises: acquiring the eligibility of the adjacent blending progress, and determining the blending correction rate; comparing the blending correction rate with a preset correction rate, and judging the eligibility of the control mode; based on the unqualified control mode, determining a variable coefficient according to a preset variable parameter to re-determine the variable coefficient, and adjusting the working state of the heating assembly based on the re-determined variable coefficient, and determining to adjust the working state of the second mixing assembly based on that the single adjustment of the working state of the heating assembly does not meet the eligibility requirement of the control mode.

[0010] Further, based on the deviation value of the deviation of the blending correction rate from the preset correction rate, the environmental pressure of the third blending fluid is adjusted, and based on the deviation value of the deviation of the blending correction rate from the preset correction rate, the subsequent environmental pressure is determined in combination with the feeding speed of the third blending fluid and the current environmental pressure.

[0011] Further, in response to the deviation of the blending correction rate from the preset correction rate, the environmental pressure of the third blending fluid is adjusted. The subsequent environmental pressure adjustment is performed based on the correction value corresponding to the feeding speed, and the correction value corresponding to the feeding speed is positively correlated with the feeding speed.

[0012] Further, the variable coefficient and the deviation of the blending correction rate have a correlation within a certain range, and the greater the deviation of the blending correction rate, the greater the variable coefficient.

[0013] Further, the interval duration of the periodic acquisition has a correlation with the blending correction rate, and the smaller the blending correction rate, the shorter the interval duration.

[0014] Further, the composite material prepared by the above-mentioned composite material blending process for indoor air purification comprises the following components in a weight ratio: 70-100 parts of the first high polymer material, 30-50 parts of the second high polymer material, 15-20 parts of the modified metal oxide, and 6-10 parts of the heat stabilizer.

[0015] Compared with the prior art, the beneficial effect of the composite material for indoor air purification and its blending process of the present invention is that, during the blending process, the raw materials can be accurately blended according to the predetermined blending progress by segmenting the blending progress and periodically detecting and correcting the deviation in a timely manner.

[0016] Furthermore, when the blending progress is not up to standard, the working state of the heating component can be adjusted according to the preset temperature adjustment amount based on the deviation amount, so as to quickly respond to the correction of the deviation in the blending progress and enable the blending progress to blend the raw materials according to the preset blending progress.

[0017] Furthermore, based on the qualification of the first viscosity and the first shear force, the working state of the heating component or the working state of the second mixing component can be adjusted in a targeted manner to ensure that the deviation in the blending progress is corrected back to the qualified state and to ensure the blending accuracy of the composite material.

[0018] Furthermore, when adjusting the working state of the heating component, or when the working state of the second mixing component is insufficient to correct the deviation in the blending progress back to the qualified state, a backup plan can be activated to adjust the environmental pressure for preparing the composite material in order to correct the blending progress back to the qualified state, ensuring that the composite material is accurately blended at the preset blending progress.

[0019] Furthermore, the process of blending into composite materials can be divided into several sub-processes. A target blending progress is set for each sub-process, and the blending progress of each sub-process is detected to verify its qualification. When the blending progress of a sub-process fails to reach the target blending progress, multi-directional control is performed based on the degree of deviation between the blending progress of the sub-process and the target blending progress, combined with multi-dimensional data in the blending process, to fully correct the deviation in the blending process and ensure that the composite material is accurately blended and prepared at the preset blending progress.

[0020] Furthermore, by adjusting the temperature, fluid viscosity, shear force accompanying the material movement, and environmental pressure during the blending process, the blending conditions can be changed from multiple directions to ensure that the modified metal oxide powder that can purify the air is fully and uniformly dispersed in other materials, so as to prepare polymer wall panels with uniform performance in subsequent processing, thereby fully improving the environment after home decoration. Attached Figure Description

[0021] Figure 1 This is a flowchart illustrating the blending process for preparing composite materials for indoor air purification according to the present invention. Figure 2 This is a flowchart illustrating the adjustment based on the unqualified blending progress of the present invention; Figure 3This is a flowchart illustrating the adjustment based on the unqualified blending correction rate according to the present invention. Figure 4 This is a schematic diagram of the structure of the second hybrid component of the present invention; In the figure: box 11, regulating box 12, moving component 13, screw rod assembly 14, heating component 15, sampling tube 16. Detailed Implementation

[0022] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0023] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0024] Please see Figure 1 The following are examples illustrating a detailed blending process for preparing composite materials used in indoor air purification: The present invention provides a composite material blending process for indoor air purification, comprising: Step S1: Obtain the first blended fluid and the second blended fluid prepared in the pre-processing step; Step S2: According to the preset blending parameters, the first blending fluid in the first mixing component is continuously added to the second mixing component to blend with the second blending fluid to form a third blending fluid. After blending, a composite material is obtained. During the blending process, the first viscosity, first shear force, and first dispersibility of the third blending fluid are periodically obtained. For example, the entire processing is controlled within 12 minutes. A detection cycle can be set every 2 minutes or every 3 minutes. Step S3: Determine the qualification level of the blending progress based on the first dispersion to determine whether to adjust the preset blending parameters; Step S4: In response to adjusting the preset blending parameters, based on the deviation between the blending progress and the target progress, combined with the first viscosity and the first shear force, the working state of the heating component 15 is determined according to the variable coefficient of the preset control parameter variable. The working state of the second mixing component is determined when adjusting the working state of the heating component 15 alone does not meet the qualification requirements of the blending progress. Step S5: Based on the passability of the adjacent blending progress, determine the blending correction rate and judge the passability of the control method. Based on the passability of the control method and the variable coefficients of the preset control parameter variables, redetermine the variable coefficients. Step S6: When the degree of correction required for the blending progress is not met by individually adjusting the variable coefficients, the environmental pressure of the third blend fluid is re-determined; Wherein, the first blending fluid is a mixture of modified metal oxide powder and a first polymer material, the second blending fluid is a mixture of modified metal oxide powder and a second polymer material, and the preset blending parameters include preset feeding rate, preset gradient heating temperature and preset blending rate.

[0025] The modified metal oxide powder can be one or more of metal oxides such as titanium dioxide, copper oxide, and zinc oxide, or other metal oxides with air purification functions; the first polymer material is preferably polyvinyl chloride, or other materials with similar properties can be used; the second polymer material is preferably polyurethane, or other materials with similar properties can be used. The first polymer material and the second polymer material are two materials with adjacent or similar melting temperatures, and the corresponding parameters need to be adjusted according to the corresponding materials. In this embodiment, the modified metal oxide powder is modified titanium dioxide, the first polymer material is polyvinyl chloride, and the second polymer material is preferably polyurethane. By judging the blending progress, the blending progress can be grasped, and based on the degree of qualification of the blending progress and the reasons for non-qualification, targeted corrections can be made to ensure that the blending progress proceeds according to the preset multiple blending stages, so as to ensure that the composite material is prepared in a state close to the ideal state.

[0026] Specifically, the pre-processing includes: The metal oxide powder was fully modified and divided into two parts with a fixed ratio of a first polymer material and a second polymer material; A first blended fluid is prepared by adding modified metal oxide powder and a first polymer material into a first mixing component at a first preset temperature and blending at a first preset blending speed. The modified metal oxide powder and the second polymer material are added into the second mixing component at a second preset temperature and mixed at a second preset mixing speed to prepare a second blended fluid.

[0027] Thus, at the first preset temperature, i.e., at a stepped temperature from 60°C to 120°C, the modified metal oxide powder and the first polymer material are fully blended, and at the second preset temperature, i.e., at a stepped temperature from 120°C to 160°C, the modified metal oxide powder and the second polymer material are fully blended, preparing for the full blending of the first blending fluid and the second blending fluid.

[0028] refer to Figure 2 The process of adjusting based on substandard blending progress is explained in detail: Specifically, the process of determining the qualification level of the blending progress based on the first dispersion, in order to determine whether to adjust the preset blending parameters, includes: The intelligent system acquires scanning electron microscope data to detect the uniformity of metal oxide dispersion in the third blend fluid within the second mixing component, and determines the first dispersion, which is the degree of dispersion of metal oxide in the third blend fluid, based on the particle size distribution. The particle size distribution in the composite material is 460 nm. For example, if the blending process is divided into three stages, the first preset dispersion corresponds to particle size distributions of 200 nm, 400 nm, and 500 nm, respectively. By setting 500 nm to exceed the particle size distribution of 460 nm in the composite material, it ensures that the particle size distribution obtained after the last blending stage is qualified, thereby reducing the risk of secondary processing. At the same time, while ensuring the material preparation speed, it is possible to obtain a material of the target quality. By comparing the first dispersion with the first preset dispersion, the degree of qualification of the blending progress is determined. Based on the unqualified blending progress, for example, if the first preset dispersion in the first stage is 200nm, and the obtained first dispersion is 180nm, the blending progress is determined to be unqualified. If the obtained first dispersion is 210nm, the blending progress is determined to be qualified. The working state of the heating component 15 is adjusted according to the preset temperature adjustment amount. If the working state of the heating component 15 alone does not meet the qualification requirements of the blending progress, the working state of the second mixing component is adjusted based on the first dispersion being less than the blending progress deviation coefficient multiplied by the first preset dispersion. The first preset dispersion is the target dispersion of the metal oxide in the third blend fluid at each test, set according to the target dispersion of complete mixing and the number of tests of the third blend fluid. In actual production, through multiple tests based on historical data, when the first dispersion is below 180nm, 360nm, and 450nm at various stages, the composite material obtained in subsequent production needs to undergo secondary processing without adjusting the blending parameters. When the first dispersion reaches 200nm, 400nm, and 500nm, the composite material obtained in subsequent preparation does not require secondary processing. When the first dispersion is in the range of 180nm-200nm, 360nm-400nm, and 450nm-500nm, there is a risk of secondary processing. Based on the degree of deviation between the first dispersion and the first preset dispersion, where the degree of deviation is the magnitude of the first dispersion's deviation from the first preset dispersion, the adjustment method is determined; wherein... If the first dispersion is greater than or equal to K × the first preset dispersion, then the adjustment method is determined to be to adjust the working state of the heating component 15 according to the preset temperature adjustment amount; If the first dispersion is less than K×first preset dispersion, then the adjustment method is determined to be adjusting the working state of the heating component 15, or adjusting the working state of the second mixing component.

[0029] Therefore, when the first dispersion is not up to standard according to the blending progress, a fixed temperature adjustment is selected first and quickly based on the degree of deviation between the first dispersion and the first preset dispersion, so as to respond in a timely manner to the adjustment of the blending conditions of the third blending fluid, and then the adjustment method is selected to specifically improve the cause of the deviation in the blending process and ensure the accuracy of the composite material preparation by the blending process.

[0030] Specifically, the process of determining the adjustment method as adjusting the working state of the heating component 15, or adjusting the working state of the second mixing component, includes: Obtain the viscosity data of the third blended fluid, determine the first viscosity, and determine its qualification; obtain the data of the rotational torque sensor that measures the torque of the screw rod, determine the first shear force, and determine its qualification. Obtain the viscosity data of the third blended fluid, determine the first viscosity, and determine its qualification; obtain the data of the rotational torque sensor that measures the torque of the screw rod, determine the first shear force, and determine its qualification. The operating state of the heating component 15 is determined based on the unqualified first viscosity, and the operating state of the second mixing component is determined based on the unqualified first shear force.

[0031] refer to Figure 3 The process of determining the suitability of the control method and adjusting the variable coefficients is explained in detail: Specifically, the process of determining the blending correction rate and judging the suitability of the control method includes, The intelligent system obtains the degree of compliance of the blending progress in each adjacent cycle and determines the blending correction rate; By comparing the blending correction rate with the preset correction rate, the qualification of the control method is determined; by comparing the first dispersion with the first preset dispersion, the qualification of the blending progress is determined. If the first dispersion is greater than or equal to the first preset dispersion, the blending progress is qualified; if the first dispersion is less than the first preset dispersion, the blending progress is unqualified. In the first stage, if the particle size distribution in the first dispersion is greater than or equal to 200 nm, the blending progress is qualified. When the blending progress is qualified, it means that it meets the preset blending progress and no adjustment is required; When the blending progress is not up to standard, it means that it does not meet the preset blending progress and needs to be adjusted. The adjustment method is determined based on the deviation of the first dispersion. When K×first preset dispersion ≤ first dispersion < first preset dispersion, the working state of the heating component 15 is adjusted according to the preset temperature adjustment amount to increase the temperature of the third blend fluid, thereby reducing the viscosity of the fluid and enabling the third blend fluid to flow more quickly, thus correcting the blending progress of the third blend fluid. Taking K as 0.9 as an example, when 180≤particle size gap<200, the preset temperature adjustment amount is 5℃, which increases the temperature at the corresponding position from 120℃ to 125℃. In the actual process of preparing composite materials from blended materials, the temperature is usually adjusted in steps of 3℃-4℃. However, when adjusting the temperature in steps of 4℃, there is often a risk of secondary processing of a small amount of composite material. Therefore, when adjusting the temperature, 4℃ is amplified to a certain extent, so 5℃ is taken as the preset temperature adjustment amount to reduce the risk of secondary processing. K is the blending progress deviation coefficient. The value of K ranges from (0.9, 1). Different values ​​can also be set according to different accuracy requirements, such as (0.95, 1) or (0.85, 1), etc. When the first dispersion is less than K × the first preset dispersion, that is, when the particle size distribution is less than 180, the control method is determined according to the flow state and shear effect of the third blend fluid. A rotational rheometer is used to measure the viscosity data of the third blend fluid, which is then transmitted to an intelligent system. The intelligent system determines the viscosity of the third blend fluid to be acceptable based on the viscosity data, i.e., the first viscosity. Taking the third blend fluid in the 120℃ range as an example, after multiple preparations of composite materials, based on actual data statistics, the first preset viscosity is set to 200 Pa·s, the first preset shear force is set to 12000 Pa, the torque is set to 650 N, and the radius R of the screw used for blending is 0.12 m, the effective mixing / shear length L of the screw is 0.6 m, and the initial rotation speed is 50 rpm to meet the initial mixing conditions of the third blend fluid. The rotary torque sensor measures the torque that drives the auger to rotate, and the intelligent system calculates the first shear force based on the torque. The following torques are the output values ​​of the rotary torque sensor and do not require secondary calculation. First shear force = torque / (2 × π × R × R × L), where R is the radius of the screw rod and L is the effective mixing / shearing length of the screw rod; The first viscosity is compared with the first preset viscosity to determine its passability. The first shear force is compared with the first preset shear force to determine its passability. If the first viscosity is less than or equal to the first preset viscosity, the first viscosity is considered passable. If the first viscosity is greater than the first preset viscosity, the first viscosity is considered unqualified. If the first shear force is less than or equal to the first preset shear force, the first shear force is considered passable. If the first shear force is greater than the first preset shear force, the first shear force is considered unqualified. If both the first viscosity and the first shear force are less than or equal to the first preset viscosity, the working state of the second mixing component is adjusted. The first viscosity is obtained from the viscosity data output by the rotational rheometer and does not require secondary calculation. The first shear force is determined by calculation based on the torque. The second mixing assembly includes a material loading chamber 11 and a moving assembly 13 mounted on the chamber 11 away from the extrusion end. The moving assembly 13 is equipped with an adjusting chamber 12 that is slidably connected to the chamber 11 to form a common space. The adjusting chamber 12 has two synchronously rotating screws at the same speed. The synchronous rotation of the two screws achieves mixing and extrusion of the material. The moving assembly 13 can drive the adjusting chamber 12 to slide, thereby causing the two screws to slide relative to the chamber 11, thus adjusting the size of the space formed by the chamber 11 and the adjusting chamber 12, as well as the position of the two screws. When the size of the space formed by the chamber 11 and the adjusting chamber 12 changes, the… The change in volume affects the environmental pressure of the third blend fluid. When the positions of the two screws change, they can simultaneously drive a portion of the third blend fluid to change its position, thereby altering the original state of the third blend fluid. Adjusting the working state of the second mixing component includes adjusting the rotational speed, environmental pressure, and mixing position of the second mixing component when mixing the third blend fluid. When adjusting the working state of the second mixing component, the rotational speed of the two screws of the twin screw extruder is first adjusted to increase the torque and thus increase the first shear force, thereby enhancing the blending effect of the modified metal oxide powder and the first polymer material and correcting any unqualified blending progress. If the first viscosity is greater than the first preset viscosity and the first shear force is greater than the first preset shear force, then the working state of the heating component 15 is adjusted to increase the temperature of the first blended fluid and increase its fluidity, thereby ensuring a stronger mixing effect and correcting the blending progress. At this time, the rotation speed of the two screws of the second mixing component is not adjusted. For example, if the current first viscosity is 220 Pa·s and the first shear force is 12500 Pa, then the temperature of the first blended fluid is increased from 120°C to 126°C. If the temperature of the first blended fluid is not adjusted, the particle size distribution of the prepared composite material will be significantly smaller than the target particle size distribution of 460 nm. Secondary processing is required to improve the quality of the composite material or reduce the grade of the prepared composite material, resulting in a decline in economic benefits. The final target product cannot achieve the target effect. For example, 100 parts of the first polymer material, 50 parts of the second polymer material, 20 parts of the modified metal oxide, and 10 parts of the heat stabilizer. In the first blend fluid, the ratio of the first polymer material to the modified metal oxide is 100:8, and in the second blend fluid, the ratio of the second polymer material to the modified metal oxide is 50:12. The resulting composite material reduces formaldehyde concentration by only 70%-80% within two hours of light exposure, falling short of the target 80%-90%.

[0032] If the first viscosity is greater than the first preset viscosity and the first shear force is less than or equal to the first preset shear force, the working states of the second mixing component and the heating component 15 are adjusted simultaneously to increase the torque, thereby increasing the first shear force and increasing the fluidity of the first blended fluid, thus correcting the blending progress. For example, if the current first viscosity is 220 Pa·s and the first shear force is 10000 Pa, the temperature of the heating component 15 is increased from 120°C to 126°C, while the torque is increased from 650 N to 700 N and the rotation speed is adjusted from 50 rpm to 64 rpm. If only the temperature of the heating component 15 is increased from 120°C to 126°C, the formaldehyde concentration of the prepared composite material can only be reduced by 65%-72% within 2 hours after the light is turned on, which is less than the target state of 80%-90%. Secondary processing is required to improve the quality of the composite material. Increasing the torque only from 650N to 700N only reduces the formaldehyde concentration by 60%-64% within two hours of illumination, falling short of the target 80%-90%. Adjusting the rotation speed only from 50 rpm to 64 rpm reduces the formaldehyde concentration by only 58%-62% within two hours of illumination, also failing to reach the target 80%-90%. After multiple preparations, it was determined that increasing the temperature from 120℃ to 125℃, simultaneously increasing the torque from 650N to 680N, and adjusting the rotation speed from 50 rpm to 60 rpm, resulted in an 80%-90% reduction in formaldehyde concentration within two hours of illumination. This avoids substandard blending progress in subsequent preparations. Therefore, a certain degree of parameter adjustment is made to ensure the quality of the prepared composite material.

[0033] The blending progress pass rate is the blending correction rate when the latter blending progress pass rate is subtracted from the former blending progress pass rate between two adjacent blending progress pass rates. For example, if the particle size distribution is 180nm in the first stage, the blending progress pass rate is 90%. If the particle size distribution is 364nm in the second stage, the blending progress pass rate is 91%, and the blending correction rate is 1%. The compliance of the control method is determined by comparing the blending correction rate with the preset correction rate. If the blending correction rate is greater than or equal to the preset correction rate, the control method is considered to be compliant. If the blending correction rate is less than the preset correction rate, the control method is considered to be compliant. When the control method is qualified, maintain the current control method to correct the current blending progress and ensure the stability of process parameters; Based on the unqualified control method, the variable coefficients of the control parameter variables are redefined to increase the adjusted control parameter variables to improve the working state of the controlled heating component 15. For example, the preset temperature adjustment is increased from 5℃ to 9℃. When adjusting the working state of the heating component 15 alone does not meet the qualification requirements of the control method, the influence of adjusting the working state of the second mixing component on the blending process is determined. For example, the torque of the second mixing component is increased from 650N to 700N, and the rotation speed is adjusted from 50 rpm to 60 rpm. At this time, the temperature of the heating component 15 has been adjusted to the maximum. If the temperature is further increased, there is a risk of composite material deformation, which will affect the final product effect. The prepared composite material will become an unqualified product and cannot be further processed.

[0034] When 0 < blending correction rate < preset correction rate, the working state of the heating component 15 is adjusted according to the newly determined control parameter variables. The rotation speed of the two screws in the second mixing component is adjusted, for example, from 50 rpm to 65 rpm, to increase the heating power of the heating component 15. For example, the temperature is adjusted from 120℃ to 129℃. Based on the fact that adjusting the working state of the heating component 15 alone does not meet the qualification requirements of the control method, the influence of adjusting the working state of the second mixing component on the blending process is determined. The influence of the unqualified control method on the blending correction rate is further corrected, thereby correcting the qualification of the blending progress. Under this adjustment, the correction of the blending progress in this processing stage can still be made up by the subsequent blending stage to ensure that the product quality requirements are met without the composite material undergoing deformation. Through the correction of the subsequent preparation process, the formaldehyde concentration of the prepared composite material can be reduced by 80%-90% within 2 hours after the light is turned on.

[0035] When the blending correction rate is ≤0, it indicates that the working state of the heating component 15 is being adjusted. For example, if the second stage temperature is 140℃, the temperature is increased to 149℃. Alternatively, the rotation speed of the two screws in the second mixing component is adjusted to compensate for insufficient blending progress, such as adjusting the rotation speed from 60 rpm to 68 rpm. At this time, the position of the regulating box 12 is adjusted so that the material is extruded through the movement of the regulating box 12 without changing the solution volume. For example, the distance between the regulating box 12 and the extrusion end in the original space is adjusted from 0.75m to 0.7m to adjust the environmental pressure of the third blending fluid, thereby further adjusting the blending progress and ensuring the third blending... The viscosity of the third blending fluid is further reduced under the condition of fluid mixing temperature to further correct the blending progress and ensure that the blended third blending fluid is used to prepare the material according to the preset blending progress. At this time, if the environmental pressure of the third blending fluid is not controlled, the product quality deficiency can be made up by secondary processing after the subsequent processing is completed. However, by controlling the environmental pressure of the third blending fluid, the distance between the regulating box 12 and the extrusion end in the original space is adjusted from 0.75m to 0.7m. It is still possible for the composite material to be qualified after the final blending processing is completed, so that the formaldehyde concentration of the composite material can be reduced by 80%-90% within 2 hours after the light is turned on. The preset correction rate is 3%, but different values ​​can be used depending on the precision of the blending process or the different stages of the blending process. The coefficients of the control parameter variables are correlated with the deviation of the blending correction rate within a certain range; the greater the deviation of the blending correction rate, the larger the coefficients of the control parameter variables. However, when the blending correction rate is greater than or equal to the preset correction rate, the coefficients of the control parameter variables remain unchanged.

[0036] Based on the unqualified blending correction rate, the variable coefficients are determined according to the preset control parameter variables to redetermine the variable coefficients, and based on the redetermined variable coefficients, the working state of the heating component 15 or the working state of the second mixing component is adjusted.

[0037] Specifically, based on the deviation of the blending correction rate from the preset correction rate, it is determined that the environmental pressure of the third blend fluid needs to be adjusted. Based on the deviation of the blending correction rate from the preset correction rate, combined with the feeding rate of the third blend fluid and the current environmental pressure, the future environmental pressure is determined.

[0038] Specifically, in response to a deviation of the blending correction rate from a preset correction rate, the environmental pressure of the third blending fluid is determined and adjusted. A correction value corresponding to the feeding rate is set for subsequent environmental pressure adjustments, where the correction value corresponding to the feeding rate is positively correlated with the feeding rate. The feeding rate is the same as the discharge rate to ensure continuous preparation of the composite material. For example, when the feeding rate is 1 kg / min, the distance between the regulating chamber 12 and the extrusion end is adjusted from 0.75 m to 0.7 m when adjusting the environmental pressure; when the feeding rate is 1.2 kg / min, the distance between the regulating chamber 12 and the extrusion end is adjusted from 0.75 m to 0.65 m when adjusting the environmental pressure. Specifically, the deviation of the variable coefficients from the blending correction rate is correlated within a certain range; the greater the deviation of the blending correction rate, the larger the variable coefficients.

[0039] Specifically, the interval for periodic acquisition is related to the blending correction rate; the smaller the blending correction rate, the shorter the interval. When a deviation in the blending progress occurs, and correcting the blending progress cannot be done in a positive direction, the periodic detection interval is shortened to ensure timely monitoring of the blending progress and to promptly correct the deviation back to the preset blending progress, thus ensuring controlled preparation of the composite material. For example, when the blending correction rate is 3%, the periodic interval remains 2 minutes; when the blending correction rate is 2%, the periodic interval is 1 minute and 40 seconds; when the blending correction rate is 1%, the periodic interval is 1 minute and 20 seconds; and when the blending correction rate is 0%, the periodic interval is 1 minute.

[0040] Specifically, the process of preparing composite materials by blending the first blending fluid and the second blending fluid is described in detail: The mixing assembly includes a housing 11 and a moving assembly 13 mounted on the housing 11 away from the extrusion end. The moving assembly 13 is equipped with an adjustment box 12 that is slidably connected to the housing 11 to form a common space. The adjustment box 12 is equipped with two synchronously rotating screws at the same speed. The synchronous rotation of the two screws at the same speed realizes the mixing and extrusion of materials. The moving assembly 13 can drive the adjustment box 12 to slide, thereby causing the two screws to slide relative to the housing 11, so as to adjust the size of the space formed by the housing 11 and the adjustment box 12 and the position of the two screws. The two screws are respectively fixedly connected to the output shaft of their respective servo motors through their respective rotational torque sensors. The intelligent system can issue speed commands to the servo motors and can also detect the completion of the commands through the feedback data of the servo motors. The screws and servo motors are combined to form a screw assembly 14. Multiple sampling tubes 16 are provided at the lower part of the housing 11 and the adjustment box 12 to sample at different stages of the mixing progress. Several heating elements 15 are linearly distributed on the outer wall of the hybrid component, and the heating temperature of the several heating elements 15 changes linearly. The lowest temperature of the heating components 15 corresponding to the first mixing component is 60°C; The highest temperature of the heating components 15 corresponding to the first mixing component is 120°C; The lowest temperature of the heating components 15 corresponding to the second mixing component is 120°C; The highest temperature of the heating components 15 corresponding to the second mixing component is 160°C; The blended materials are heated in a stepped manner to avoid excessively high temperatures in the first blending fluid, which could lead to degradation and failure of the composite material blending. The uniform dispersion of the heat stabilizer ensures that degradation does not occur. During the stepped temperature heating process, the uniform dispersion of the heat stabilizer enhances the degradation resistance of the third blending fluid, thus ensuring that the blending is fully completed when the stepped temperature reaches below 160°C. The composite material is then extruded from the outlet. The stepped temperature heating also facilitates temperature control of the third blending fluid and timely correction of deviations from the blending progress. This allows the blending process to be completed under the control of an intelligent system, resulting in the preparation of a composite material in an ideal state.

[0041] Specifically, the process of ensuring uniform dispersion of the modified metal oxides during blending is described in detail: Scanning electron microscope (SEM) is used to detect the dispersion uniformity of modified metal oxides in the third blend fluid sample. The intelligent system acquires the data from the SEM, analyzes it, and then issues instructions based on the analysis results. The preset control parameters include the preset temperature change of the heating component 15 and the preset rotation speed change of the second mixing component. The preset temperature change is correlated with the deviation of the first dispersion. The preset speed change is correlated with the deviation of the first dispersion. Let the preset temperature change be ΔT, the preset rotational speed change be ΔV, and the deviation of the first dispersion be Δσ; ΔT = q1 × Δσ; q1 is the temperature variable coefficient of the control parameter variable; for example, in the first stage, when Δσ is 20nm, q1 is 0.25, then ΔT is 5℃; when Δσ is 30nm, q1 is 0.3, then ΔT is 9℃; when Δσ is 40nm, q1 is 0.35, then ΔT is 14℃. ΔV = q² × Δσ; q2 is the rotational speed variable coefficient of the control parameter variable; for example, in the first stage, when Δσ is 20nm, q1 is 0.5, then ΔV is 10 rpm; when Δσ is 30nm, q1 is 0.6, then ΔV is 18 rpm; when Δσ is 40nm, q1 is 0.7, then ΔV is 28 rpm. q represents the coefficient of the control parameter variable, which includes the coefficient of temperature variable and the coefficient of rotational speed variable; Based on the blending progress qualification of adjacent cycles, the blending correction rate is determined, the qualification of the correction process is judged, and the variable coefficients of the previous adjustment parameter variables are combined to redetermine the variable coefficients of this time. The blending progress pass rate is determined by dividing the first dispersion by the first preset dispersion.

[0042] Specifically, a first embodiment of the composite material prepared using the above-described composite material blending process for indoor air purification is described in detail: The composite material comprises the following components in the following weight ratios: 70 parts of a first polymer material, 30 parts of a second polymer material, 15 parts of a modified metal oxide, and 6 parts of a heat stabilizer. In the first blend, the ratio of the first polymer material to the modified metal oxide is 70:7, and in the second blend, the ratio of the second polymer material to the modified metal oxide is 30:8. Within two hours of light exposure, it can reduce the formaldehyde concentration in a sealed chamber by approximately 60%-75%. The initial purification rate is approximately 0.25-0.35 mg / (m²·h) in the first 30 minutes. After 24 hours of continuous light exposure, the formaldehyde removal rate can reach 85%-92%, reducing the formaldehyde concentration below safe levels.

[0043] Specifically, a second embodiment of the composite material prepared using the above-described composite material blending process for indoor air purification is described in detail: The composite material comprises the following components in the following weight ratios: 85 parts of a first polymer material, 40 parts of a second polymer material, 18 parts of a modified metal oxide, and 8 parts of a heat stabilizer. In the first blend, the ratio of the first polymer material to the modified metal oxide is 85:8, and in the second blend, the ratio of the second polymer material to the modified metal oxide is 40:10. Under the same conditions, within 2 hours after illumination, it can reduce formaldehyde concentration by approximately 85%-88%. The initial purification rate for the first 30 minutes is approximately 0.45-0.52 mg / (m²·h). The 24-hour removal rate achieves a formaldehyde removal rate of ≥96%.

[0044] Specifically, a third embodiment of the composite material prepared using the above-described composite material blending process for indoor air purification is described in detail: The composite material comprises the following components in the following weight ratios: 100 parts of a first polymer material, 50 parts of a second polymer material, 20 parts of a modified metal oxide, and 10 parts of a heat stabilizer. In the first blend, the ratio of the first polymer material to the modified metal oxide is 100:8, and in the second blend, the ratio of the second polymer material to the modified metal oxide is 50:12. Under the same conditions, formaldehyde concentration can be reduced by approximately 80%-90% within 2 hours after light exposure. The initial purification rate is significantly improved, reaching 0.40-0.55 mg / (m²·h). The purification efficiency achieves a formaldehyde removal rate of >95% within 12-18 hours of continuous light exposure, and even exceeds 98% after 24 hours, resulting in more thorough purification.

[0045] At this point, the modified metal oxide powder can be one or more of metal oxides such as titanium dioxide, copper oxide, and zinc oxide, or other metal oxides with air purification functions; the first polymer material is preferably polyvinyl chloride, or other materials with similar properties can be used; the second polymer material is preferably polyurethane, or other materials with similar properties can be used; the heat stabilizer is a composite calcium-zinc metal soap or epoxidized soybean oil; the first polymer material and the second polymer material are two materials with different adjacent or similar melting temperatures, and the corresponding parameters need to be adjusted according to the corresponding materials. In this embodiment, the modified metal oxide powder is modified titanium dioxide powder, the first polymer material is polyvinyl chloride, the second polymer material is polyurethane, and the heat stabilizer is a composite calcium-zinc metal soap. The extruded composite material is collected after thorough cooling, packaged, and reserved for later use in the preparation of polymer wall panels for home decoration. It functions by modifying metal oxides in a photocatalytic process. Appropriately energized ultraviolet photons strike the surface of the metal oxide, causing electron transitions in the valence band, forming electron-hole pairs, and subsequently generating hydroxyl radicals and superoxide anion radicals. These highly reactive radicals act like "air purifiers" hidden on the wall surface, actively capturing and oxidizing free formaldehyde molecules in the air. Once formaldehyde is adsorbed onto the surface of the polymer wall panel, it is rapidly converted into harmless carbon dioxide and water under the reaction of the free radicals, achieving continuous indoor air purification.

[0046] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A composite material blending process for indoor air purification, characterized in that, include, Obtain the first and second blended fluids prepared in the pre-processing step; According to the preset blending parameters, the first blending fluid in the first mixing component is continuously added to the second mixing component and blended with the second blending fluid to form a third blending fluid. During the blending process, the first viscosity, first shear force and first dispersibility of the third blending fluid are periodically obtained. The degree of qualification of the blending progress is determined based on the first dispersion, so as to determine the strategy for adjusting the preset blending parameters; In response to adjusting the preset blending parameters, the working state of the heating component is determined based on the deviation between the blending progress and the target progress, combined with the first viscosity and the first shear force, according to the variable coefficients of the preset control parameter variables. The working state of the second mixing component is determined based on the fact that adjusting the working state of the heating component alone does not meet the qualification requirements of the blending progress. Based on the passability of the adjacent blending progress, the blending correction rate is determined and the passability of the control method is judged. Based on the passability of the control method and the variable coefficients of the preset control parameter variables, the variable coefficients are re-determined. When the adjustment of the variable coefficients alone fails to meet the required correction for the blending progress, the environmental pressure of the third blend fluid is re-determined; Wherein, the first blending fluid is a mixture of modified metal oxide powder and a first polymer material, the second blending fluid is a mixture of modified metal oxide powder and a second polymer material, and the preset blending parameters include preset feeding rate, preset gradient heating temperature and preset blending rate.

2. The composite material blending process for indoor air purification according to claim 1, characterized in that, The pre-processing process includes: The metal oxide powder was fully modified and divided into two parts with a fixed ratio of a first polymer material and a second polymer material; A first blended fluid is prepared by adding modified metal oxide powder and a first polymer material into a first mixing component at a first preset temperature and blending at a first preset blending speed. The modified metal oxide powder and the second polymer material are added into the second mixing component at a second preset temperature and mixed at a second preset mixing speed to prepare a second blended fluid.

3. The composite material blending process for indoor air purification according to claim 1, characterized in that, The process of determining the qualification level of the blending progress based on the first dispersion, so as to determine the strategy for adjusting the preset blending parameters, includes: The intelligent system acquires scanning electron microscope data to detect the uniformity of metal oxide dispersion in the third blend fluid within the second mixing component, and determines the first dispersion. Compare the first dispersion with the first preset dispersion to determine the degree of qualification of the blending progress; Based on the unqualified blending progress, the working state of the heating component is determined to be adjusted according to the preset temperature adjustment amount. Based on the fact that adjusting the working state of the heating component alone does not meet the blending progress qualification requirements, and based on the fact that the first dispersion is less than the blending progress deviation coefficient multiplied by the first preset dispersion, the working state of the second mixing component is determined to be adjusted.

4. The composite material blending process for indoor air purification according to claim 3, characterized in that, The process of adjusting the operating state of the second hybrid component includes: Obtain the viscosity data of the third blended fluid, determine the first viscosity, and determine its qualification; obtain the data of the rotational torque sensor that measures the torque of the screw rod, determine the first shear force, and determine its qualification. The operating state of the heating component is determined based on the unqualified first viscosity, and the operating state of the second mixing component is determined based on the unqualified first shear force.

5. The composite material blending process for indoor air purification according to claim 4, characterized in that, The process of determining the blending correction rate and judging the suitability of the control method includes: Obtain the pass rate of adjacent blending progresses and determine the blending correction rate; The suitability of the control method is determined by comparing the blending correction rate with the preset correction rate. Based on the unqualified control method, the variable coefficients are determined according to the preset control parameter variables to redetermine the variable coefficients, and the working state of the heating component is adjusted based on the redetermined variable coefficients. If adjusting the working state of the heating component alone does not meet the qualification requirements of the control method, the working state of the second mixing component is adjusted.

6. The composite material blending process for indoor air purification according to claim 5, characterized in that, Based on the deviation of the blending correction rate from the preset correction rate, the environmental pressure of the third blend fluid is adjusted. Based on the deviation of the blending correction rate from the preset correction rate, combined with the feeding rate of the third blend fluid and the current environmental pressure, the subsequent environmental pressure is determined.

7. The composite material blending process for indoor air purification according to claim 6, characterized in that, In response to a deviation of the blending correction rate from a preset correction rate, the environmental pressure of the third blend fluid is determined and adjusted. The environmental pressure is subsequently adjusted based on the set correction value corresponding to the feeding rate, and the correction value corresponding to the feeding rate is positively correlated with the feeding rate.

8. The composite material blending process for indoor air purification according to claim 5, characterized in that, The deviations of the variable coefficients from the blending correction rate are correlated within a certain range; the greater the deviation of the blending correction rate, the larger the variable coefficients.

9. The composite material blending process for indoor air purification according to claim 1, characterized in that, The interval between periodic acquisitions is related to the blending correction rate; the smaller the blending correction rate, the shorter the interval.

10. A composite material prepared using the composite material blending process for indoor air purification as described in any one of claims 1 to 9, characterized in that, The composite material comprises the following components in the following weight ratios: 70-100 parts of a first polymer material, 30-50 parts of a second polymer material, 15-20 parts of a modified metal oxide, and 6-10 parts of a heat stabilizer.

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