Low-emission degumming method process for apocynum venetum

Abstract

The invention relates to the technical field of apocynum venetum degumming processing, and discloses an apocynum venetum low-emission degumming method process which comprises the following steps: S1, cleaning and pretreating an apocynum venetum raw material; s2, soaking the pretreated fibers in a solvent containing specific nanoparticles; s3, treating the soaked fibers by using a pulse electromagnetic field so as to enhance the penetration of the nanoparticles through the fiber structure; s4, treating the fibers by using a specific enzyme enhanced by a gene editing technology; s5, promoting enzyme activity by using microwave energy, and optimizing enzyme reaction by adjusting microwave power and exposure time; and S6, removing residual colloids in the reinforced fibers by applying ultrasonic vibration. According to the method, the degumming efficiency of apocynum venetum is effectively improved by adopting specific nanoparticles and pulse electromagnetic field treatment and combining with specific enzyme enhanced by a gene editing technology, so that the decomposition process of colloid is accelerated, physical damage to fibers is reduced, and the original strength and texture of the fibers are kept.

Description

Technical Field

[0001] The invention relates to the technical field of apocynum venetum degumming processing, in particular to a low-emission degumming method and process for apocynum venetum. Background Art

[0002] As a high-quality natural fiber, apocynum ramie is widely used in textile manufacturing due to its high strength, good moisture absorption and air permeability. However, the traditional apocynum ramie degumming process faces many challenges, especially in terms of environmental impact, energy consumption and fiber quality protection. Traditional methods usually rely on a large amount of chemical reagents (such as strong alkali) and high temperature treatment to remove the natural colloid in the fiber, which not only consumes a lot of energy, but also produces a large amount of harmful environmental emissions, and may also damage the strength and texture of the fiber.

[0003] In addition, the water resource utilization efficiency in traditional processes is low, and the chemicals remaining in the treated water usually make it impossible to recycle them, exacerbating the waste and pollution of water resources. If the chemicals used in these treatment processes are not properly handled, they may also cause serious environmental pollution and affect the ecosystem and human health.

[0004] To this end, those skilled in the art provide a low-emission degumming method for Apocynum venetum to solve the problems raised in the above background technology. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a low-emission degumming method for apocynum venetum, which solves the problems of the prior art such as heavy environmental burden, high energy and water resource consumption, and great damage to fiber quality.

[0006] To achieve the above object, the present invention is implemented by the following technical scheme: a low-emission degumming method of apocynum venetum, comprising the following steps:

[0007] S1, cleaning and pre-treating the apocynum raw material to remove impurities and adjust the physical state of the fiber;

[0008] S2, soaking the pretreated fiber in a solvent containing specific nanoparticles;

[0009] S3, applying pulsed electromagnetic field to treat the soaked fibers to enhance the penetration of nanoparticles into the fiber structure;

[0010] S4, treating the fibers with specific enzymes enhanced by gene editing technology to break down the gelatin;

[0011] S5. Apply microwave energy to promote enzyme activity and optimize enzyme reaction by adjusting microwave power and exposure time;

[0012] S6. Use ultrasonic vibration to enhance the removal of residual colloid in the fiber;

[0013] S7, using specially prepared adsorbent materials to remove waste enzymes and colloids from the treated solution;

[0014] S8, recovering nanoparticles from the solvent using supercritical carbon dioxide extraction technology;

[0015] S9, rapidly cooling the fiber to stabilize its structure;

[0016] S10, washing the treated fibers for a second time, and performing a final wash using optimized pH and temperature conditions.

[0017] Preferably, the nanoparticles in step S2 are zinc oxide nanoparticles with a particle size of 5-25 nm.

[0018] Preferably, the frequency of the electromagnetic field in step S3 is set to 100-1kHz, and the pulse width is 10-100μs.

[0019] Preferably, the enzyme mixture used in step S4 comprises cellulase and xylanase, and the temperature of the mixture is maintained at 30-40°C.

[0020] Preferably, the microwave power in step S5 is set to 200-500 W, and the duration is 1-5 min.

[0021] Preferably, the ultrasonic frequency in step S6 is 20-60 kHz, and the ultrasonic vibration duration is set to 15-30 min.

[0022] Preferably, the adsorption material used in step S7 includes but is not limited to activated carbon, zeolite and organic adsorption resin.

[0023] Preferably, the carbon dioxide supercritical extraction conditions in step S8 are a pressure of 150-250 bar and a temperature of 31-40°C.

[0024] Preferably, the pH value of the cleaning solution in step S10 is adjusted to 6-8, and the cleaning temperature is maintained at 50-60°C.

[0025] Preferably, the rapid cooling temperature in step S9 is 0-5°C.

[0026] The present invention provides a low-emission degumming method for apocynum venetum, which has the following beneficial effects:

[0027] 1. The present invention effectively improves the degumming efficiency of Apocynum venetum by using specific nanoparticles and pulsed electromagnetic field treatment, combined with specific enzymes enhanced by gene editing technology. It not only accelerates the decomposition process of the colloid, but also reduces the physical damage to the fiber, maintains the original strength and texture of the fiber, thereby improving the quality and market competitiveness of the final product.

[0028] 2. The present invention realizes efficient use of energy by combining microwave and ultrasonic technology. The precisely controlled microwave and ultrasonic treatment not only optimizes the application of energy and reduces overall energy consumption, but also reduces the burden on the environment by reducing the use of chemicals, making the degumming process more environmentally friendly.

[0029] 3. The present invention utilizes carbon dioxide supercritical extraction technology to recover nanoparticles and solvents from the treated liquid, significantly improving the reuse rate of these materials. This not only reduces the demand for new materials and reduces production costs, but also meets the requirements of sustainable development and reduces industrial waste and environmental pollution.

[0030] 4. The present invention significantly reduces the chemical oxygen demand and suspended solids content in the treated water by optimizing the cleaning process and water treatment steps, thereby increasing the water reuse potential, helping to reduce the factory's water consumption and dependence on external water resources, and further enhancing the environmental friendliness and economic benefits of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Basic settings

[0034] step:

[0035] Pretreatment: The raw material of Apocynum venetum is treated in preliminary mechanical washing equipment to remove physical impurities, and then further washed with warm water to adjust the physical state of the fiber in preparation for chemical treatment.

[0036] Nanoparticle treatment: The washed apocynum venetum fibers were immersed in a solvent containing zinc oxide nanoparticles with a particle size of 5 nm. The solvent temperature was set at 25° C. and the immersion time was 2 hours.

[0037] Electromagnetic field treatment: The soaked fibers were treated with a pulsed electromagnetic field with a frequency of 100 Hz and a pulse width of 10 μs for 30 min to enhance the penetration of the nanoparticles into the fiber structure.

[0038] Enzyme treatment: The fiber is treated with a mixture of cellulase and xylanase optimized by genetic technology at 30°C for 4 hours to effectively decompose the gelatin.

[0039] Microwave promotion: The enzyme-activated fibers were treated with a microwave power of 200 W for a duration of 1 minute to promote further activity of the enzyme.

[0040] Ultrasonic treatment: The fibers were treated with ultrasonic vibrations at a frequency of 20 kHz for 15 minutes to enhance the removal of residual colloid in the fibers.

[0041] Adsorption removal: Use activated carbon adsorption material to remove waste enzymes and colloids from the treatment liquid for 1 hour.

[0042] CO2 supercritical extraction: Carbon dioxide supercritical extraction was performed at 150 bar pressure and 31°C to recover the nanoparticles in the solvent. The extraction time was 3 hours.

[0043] Rapid cooling: The treated fiber was rapidly cooled at 0°C for 10 minutes.

[0044] Secondary cleaning: The final cleaning of the fiber was performed using a pH 6 solution at 50°C for 30 minutes.

[0045] Summary: This example demonstrates a complete degumming process for ramie, using environmentally friendly and energy-saving technologies at every step, from pretreatment to secondary cleaning. The penetration of fibers was enhanced by the use of nanoparticles and pulsed electromagnetic fields, while the use of gene-editing enzymes significantly improved the efficiency and selectivity of colloid decomposition. In addition, the application of microwaves and ultrasound improved energy efficiency and reduced energy consumption in the process. The entire process is designed to improve degumming efficiency, reduce chemical and energy consumption, and optimize environmental effects. It is suitable for production settings that want to balance cost, efficiency, and environmental impact.

[0046] Example 2: Temperature Enhancement

[0047] step:

[0048] Same as Example 1, but in the enzyme treatment (S4) step, the temperature is increased to 40°C to accelerate the enzyme reaction. In the final cleaning step (S10), the cleaning temperature is increased to 60°C to ensure thorough cleaning.

[0049] Summary: In this embodiment, by increasing the temperature of enzyme treatment and final washing, the speed of chemical reaction is accelerated, thereby improving the degumming speed and efficiency. This method is particularly suitable for production environments that require rapid processing of large quantities of fibers. Under high temperature conditions, the activity of the enzyme is fully exerted, but it may also put forward higher requirements for fiber quality control, and it is necessary to ensure the accuracy of temperature control to avoid excessive fiber damage.

[0050] Example 3: Nanoparticle Concentration Enhancement

[0051] step:

[0052] The same as Example 1, but the particle size of the nanoparticles was adjusted to 25 nm, and the concentration in the solvent was increased to test the effect of different particle sizes and concentrations on the degumming efficiency.

[0053] In summary: Increasing the concentration of nanoparticles and changing their particle size directly affects the interaction between nanoparticles and fibers, thereby improving the degumming effect of nanoparticles. This setting is particularly suitable for processing those apocynum fibers with high colloid content or difficult to degummed. Higher concentrations of nanoparticles can more effectively break down the colloid structure in the fiber, but more precise control techniques are also required to manage possible fiber damage.

[0054] Example 4: Ultrasonic and microwave enhancement

[0055] step:

[0056] Same as Example 1, but the microwave power is increased to 500 W, and the treatment time is extended to 5 minutes; the ultrasonic frequency is increased to 60 kHz, and the treatment time is extended to 30 minutes.

[0057] Summary: By increasing microwave power and ultrasonic frequency and their application time, this embodiment significantly improves the processing efficiency, and is particularly suitable for industrial applications that have strict requirements on processing time. The enhanced physical treatment helps to remove the colloid in the fiber more thoroughly, while increasing the cost of equipment and energy consumption. This method requires highly precise equipment control and parameter optimization to achieve the best degumming effect and fiber protection.

[0058] Example 5: Extraction pressure and time extension

[0059] step:

[0060] Same as Example 1, but in the CO2 supercritical extraction step (S8), the pressure was increased to 250 bar and the extraction time was extended to 5 hours.

[0061] Summary: Prolonging the supercritical CO2 extraction time and increasing the pressure can help to more thoroughly recover the nanoparticles and solvents in the treatment solution, which not only improves the recycling rate of resources, but also further reduces the environmental impact of the production process. This method is suitable for companies that pay special attention to environmental protection and sustainable production. Although this method may increase production costs, its long-term environmental and cost benefits are significant.

[0062] Summary

[0063] Through these five embodiments, it can be seen that the degumming efficiency and quality can be significantly affected by adjusting different process parameters (such as temperature, nanoparticle concentration, ultrasonic and microwave power, extraction pressure and time). These adjustments provide flexibility so that the process can be optimized according to different production requirements and environmental standards. In addition, each embodiment emphasizes how to reduce the use of energy and chemicals while achieving efficient degumming, demonstrating the comprehensive advantages and application potential of a low-emission degumming method and process for Apocynum venetum.

[0064] Test experiments and data

[0065] All five embodiments will be tested in detail, including the measurement of degumming rate, energy consumption, processing time and residual chemicals. These data will be obtained through laboratory testing and presented in the form of data tables to ensure the scientific and repeatable experimental results.

[0066] Experimental methods

[0067] Sample preparation:

[0068] The apocynum venetum samples were prepared according to the above five embodiments.

[0069] At least three replicate samples were prepared for each example to ensure the reliability of the data.

[0070] Degumming efficiency test:

[0071] The gum content before and after treatment was determined using a standardized method, and the degumming rate was calculated.

[0072] Degumming rate = (initial gum content - gum content after treatment) / initial gum content x 100%

[0073] Environmental Impact Assessment:

[0074] The chemical usage and wastewater discharge during the treatment process of each example were measured.

[0075] Record the residual chemicals in the treatment fluid, especially the heavy metal content.

[0076] Energy consumption measurement:

[0077] The total energy required (electrical energy consumption) for each embodiment was measured, including microwave, ultrasonic and other energy consumption.

[0078] Fiber quality assessment:

[0079] The strength and flexibility of the treated fibers were measured.

[0080] Scanning electron microscopy (SEM) was used to evaluate the structural changes on the fiber surface.

[0081] Comparative Experimental Design

[0082] Purpose

[0083] The efficiency and environmental impact of the conventional chemical degumming method are compared with those of Example 1, as well as the performance differences between the different examples.

[0084] Experimental setup

[0085] Comparative experiment 1: traditional chemical degumming method and Example 1.

[0086] The conventional high-alkali treatment was used as the control group to compare the degumming rate and environmental emissions.

[0087] Comparative experiment 2: Example 2 and Example 3.

[0088] The effects of different temperatures and nanoparticle concentrations on the degumming efficiency were compared.

[0089] Comparative Experiment 3: Example 4 and Example 5.

[0090] The effects of different physical treatment technologies (microwave and ultrasonic) and different extraction pressures on degumming efficiency and fiber quality were compared.

[0091] Experimental data table

[0092]

[0093] Comparative experimental data table

[0094]

[0095] Comparative Experiment Summary

[0096] Comparative experiment 1: Comparison between traditional chemical degumming and Example 1

[0097] Summarize:

[0098] The conventional chemical degumming method showed higher energy consumption and chemical usage, as well as greater environmental emissions compared to Example 1. This indicates that the low-emission degumming technology of Example 1 can not only effectively reduce the consumption of energy and chemical substances, but also significantly reduce environmental emissions. In addition, Example 1 also showed superiority in degumming efficiency and fiber strength, which may be attributed to more sophisticated control and advanced material processing technology.

[0099] Comparative Experiment 2: Comparison between Example 2 and Example 3

[0100] Summarize:

[0101] Comparison of Example 2 and Example 3 highlights the role of temperature and nanoparticle concentration in improving degumming efficiency. In Example 3, a higher degumming rate was achieved by increasing the nanoparticle concentration, indicating that increasing the concentration of nanoparticles can more effectively break down the gelatinous structure in the fiber, although this may require additional cost and precise control to avoid fiber damage.

[0102] Comparative Experiment 3: Comparison between Example 4 and Example 5

[0103] Summarize:

[0104] Comparison between Example 4 and Example 5 reveals the effects of different physical treatment techniques on degumming efficiency. The enhanced microwave and ultrasonic treatment in Example 4 significantly improved the degumming rate and fiber quality, while the enhanced supercritical CO2 extraction in Example 5 improved the recovery of nanoparticles and solvents, but the degumming rate was slightly lower, indicating that appropriate physical treatment may be more critical to improving the direct degumming effect.

[0105] Test experiment summary

[0106] Summarize:

[0107] The test results of the five examples show the wide applicability and superiority of the low-emission degumming method. All examples successfully reduced energy consumption and chemical usage, and improved degumming rate and fiber strength. In particular, by combining nanotechnology, gene editing enzymes, microwaves and ultrasonic treatments, Example 4 demonstrated the highest degumming efficiency and optimal fiber quality, which is difficult to achieve in traditional methods.

[0108] Through these summaries, it can be seen that each embodiment has its unique advantages, and the selection of the most appropriate embodiment will depend on specific production needs, cost considerations, and environmental impact assessments. These experiments and comparative analyses provide valuable data and insights that will help further improve the degumming process and achieve the optimal balance between environmental protection and economic benefits.

[0109] Experimental design purpose

[0110] Comparing the low-emission degumming method of apocynum venetum of the present invention with the traditional degumming method of apocynum venetum, special attention is paid to the following aspects:

[0111] Degumming efficiency

[0112] Energy consumption

[0113] Chemical Substance Used

[0114] Fiber quality after treatment

[0115] Quality and recyclability of treated water

[0116] Experimental setup

[0117] Comparison group:

[0118] Traditional group: using conventional alkaline degumming method, involving large amount of alkali solution and high temperature treatment.

[0119] Experimental group: the low-emission degumming method of Apocynum venetum of the present invention was applied, as described in the above-mentioned embodiment.

[0120] Experimental parameters:

[0121] Degumming efficiency: measured by comparing the difference in gum content before and after treatment.

[0122] Energy consumption: Records the electrical energy consumption of each step.

[0123] Chemical Usage: Record the total amount of chemical used in each step.

[0124] Fiber quality: The mechanical properties and surface structure of the fibers were evaluated by tensile testing and SEM analysis.

[0125] Water quality testing: Analyze the chemical oxygen demand (COD), suspended solids (SS) and pH of water before and after treatment to assess the water’s reuse potential.

[0126] Experimental Procedure

[0127] Sample preparation: Samples were taken from the same batch of Apocynum venetum to ensure consistency.

[0128] Degumming treatment:

[0129] The conventional group was processed according to the standard industrial caustic cleaning procedure.

[0130] The experimental group applied the method described in the present invention.

[0131] Data Collection:

[0132] The gum content is determined using precise weighing and chemical analysis techniques.

[0133] Record the energy consumption of each processing step, using an electric meter or equivalent.

[0134] Collect and analyze chemical substance usage data.

[0135] Tensile testing and SEM analysis of the fibers were performed.

[0136] Collect and analyze process water samples.

[0137] Data Analysis:

[0138] Data on degumming rate, energy consumption, chemical usage, fiber quality, and water quality were statistically analyzed.

[0139] Statistical methods such as ANOVA or t-test were used to determine the significance of the results.

[0140] Data presentation

[0141] The experimental data will be presented using tables and graphs to show the performance differences between the two methods under different parameters:

[0142]

[0143] in conclusion

[0144] This comparative experiment will demonstrate the significant advantages of the low-emission degumming method of the present invention in improving degumming efficiency, reducing energy consumption and chemical substance usage, improving fiber quality, and optimizing treatment water quality, highlighting its contribution to environmental friendliness and sustainable development.

[0145] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-emission degumming method for apocynum venetum, characterized in that: The following steps are involved: S1, cleaning and pre-treating the apocynum raw material to remove impurities and adjust the physical state of the fiber; S2, soaking the pretreated fiber in a solvent containing specific nanoparticles; S3, applying pulsed electromagnetic field to treat the soaked fibers to enhance the penetration of nanoparticles into the fiber structure; S4, treating the fibers with specific enzymes enhanced by gene editing technology to break down the gelatin; S5. Apply microwave energy to promote enzyme activity and optimize enzyme reaction by adjusting microwave power and exposure time; S6. Use ultrasonic vibration to enhance the removal of residual colloid in the fiber; S7, using specially prepared adsorbent materials to remove waste enzymes and colloids from the treated solution; S8, recovering nanoparticles from the solvent using supercritical carbon dioxide extraction technology; S9, rapidly cooling the fiber to stabilize its structure; S10, washing the treated fibers for a second time, and performing a final wash using optimized pH and temperature conditions.

2. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The nanoparticles in step S2 are zinc oxide nanoparticles with a particle size of 5-25 nm.

3. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The frequency of the electromagnetic field in step S3 is set to 100-1 kHz, and the pulse width is 10-100 μs.

4. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The enzyme mixture used in step S4 comprises cellulase and xylanase, and the temperature of the mixture is maintained at 30-40°C.

5. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The microwave power in step S5 is set to 200-500 W, and the duration is 1-5 min.

6. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The ultrasonic frequency in step S6 is 20-60 kHz, and the ultrasonic vibration duration is set to 15-30 min.

7. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The adsorption material used in the step S7 includes but is not limited to activated carbon, zeolite and organic adsorption resin.

8. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The carbon dioxide supercritical extraction conditions in step S8 are a pressure of 150-250 bar and a temperature of 31-40°C.

9. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The pH value of the cleaning solution in step S10 is adjusted to 6-8, and the cleaning temperature is maintained at 50-60°C.

10. A low-emission degumming method for apocynum venetum according to claim 1, characterized in that: The rapid cooling temperature in the step S9 is 0-5°C.

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