Preparation process of pre-oxidized fiber aerogel blanket

Abstract

The invention discloses a preparation technology of a pre-oxidized fiber aerogel blanket, and relates to the technical field of aerogel blanket preparation, and the preparation technology comprises the following steps: sol preparation, gelation, dehydration, pre-oxidation treatment, post-treatment, and storage and packaging. Firstly, the left air cylinder is controlled to be started to drive the left clamping plate to clamp the left end of a sample, then the right air cylinder is controlled to be started to drive the right clamping plate to extrude the right end of the sample, in this way, clamping of the right end of the sample is rapidly completed, and clamping and positioning of the sample can be rapidly completed through cooperative use of the left air cylinder and the right air cylinder; the right end of the sample can be driven to move rightwards by controlling the stretching air cylinder to start, and when the sample is broken, the tension sensor can detect the tension value in time, so that the detection of the tensile strength of the sample is quickly completed, the detection mode is time-saving and labor-saving, and the detection efficiency of the aerogel blanket is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field related to the preparation of aerogel blankets, and specifically to a preparation process of a pre-oxidized fiber aerogel blanket. Background Art

[0002] The pre-oxidized fiber aerogel blanket is a kind of aerogel product. It uses pre-oxidized fibers as the base material, mixes with silica aerogel, and undergoes heat treatment at high temperature to form a porous aerogel structure. Then, through processes such as compounding and compression, the aerogel is fixed on the fiber filaments to finally form a heat-insulating material.

[0003] Currently, the preparation of pre-oxidized fiber aerogel blankets includes multiple process flows, and the detection step is an important part among them. Most of the existing detection devices for pre-oxidized fiber aerogel blankets can only detect the data of one property of the sample through one device. In this way, it is necessary for the staff to move the sample to the next detection device after one device finishes the detection. This operation is obviously too troublesome and reduces the detection efficiency of the aerogel blanket. Moreover, the existing detection devices for pre-oxidized fiber aerogel blankets are not convenient for reusing the detected samples, which causes waste of resources and increases the detection cost of the pre-oxidized fiber aerogel blankets. Summary of the Invention

[0004] To solve the defects existing in the prior art, the present invention provides a preparation process of a pre-oxidized fiber aerogel blanket.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A preparation process of a pre-oxidized fiber aerogel blanket according to the present invention includes the following steps:

[0007] S1. Raw material preparation:

[0008] Polymer selection: Select a suitable polymer as the precursor material, usually an organosilicon polymer or a polyamide, etc.; Solvent selection: Select an appropriate solvent according to the properties of the polymer, such as an alcohol or ether solvent, to facilitate the subsequent sol-gel reaction;

[0009] S2. Sol preparation:

[0010] Dissolution: Dissolve the polymer in the selected solvent to obtain a uniform polymer solution; Additives addition: According to needs, add a catalyst (such as an acid or a base) and a cross-linking agent to promote the subsequent polymerization reaction;

[0011] S3. Gelation:

[0012] Reaction conditions: Under certain temperature and time, let the sol undergo a gelation reaction to form a gel with a network structure; Molding: Pour the gel into a mold for molding to form the required thin blanket shape;

[0013] S4. Dehydration:

[0014] Supercritical drying: Use supercritical carbon dioxide or other solvents for dehydration to remove the solvent in the gel and prevent structural collapse; Conventional drying: Conduct drying under conventional conditions, usually using vacuum or hot air drying;

[0015] S5. Pre-oxidation treatment:

[0016] Heat treatment: Pre-oxidize the dried aerogel blanket, usually heating it to a certain temperature in an air or oxygen atmosphere to promote the oxidation and decomposition of organic substances and form an inorganic skeleton; Temperature control: Control the heating rate and final temperature to obtain ideal aerogel properties;

[0017] S6. Post-treatment:

[0018] Surface modification: According to application requirements, conduct surface modification treatment, such as coating with a waterproof agent or antibacterial agent, to enhance the functionality of the aerogel; Performance testing: Conduct performance testing on the aerogel blanket, including thermal conductivity, density, strength, etc., to ensure that it meets the usage requirements;

[0019] S7. Storage and packaging:

[0020] Storage: Store in a dry and cool environment, avoiding moisture and high temperature; Packaging: Use appropriate packaging materials to ensure that the aerogel blanket is not damaged during transportation and storage;

[0021] The performance detection device to be used in the above post-treatment includes a lower support platform. The upper surface of the lower support platform is fixedly connected with an upper machine case. Tensile detection components are fixedly installed on the upper surface of the lower support platform and the inner walls of both sides of the upper machine case, which are used to detect the strength and heat insulation performance of the pre-oxidized fiber aerogel blanket. Compressive detection components are installed on the upper surface of the upper machine case and the lower surface of the lower support platform, which are used to detect the compressive performance of the pre-oxidized fiber aerogel blanket. A processing box is fixedly installed at the top of the right side surface of the upper machine case, which is used to control the tensile detection components and the compressive detection components.

[0022] As a preferred technical solution of the present invention, the tensile detection component includes a middle support platform. The lower end of the middle support platform is fixedly connected with the middle part of the upper surface of the lower support platform. A plurality of temperature sensors are embedded in the upper surface of the middle support platform. The upper surface of the rear end of the middle support platform is fixedly connected with a rear support. A heating lamp is fixedly installed at the upper end of the rear support. The bottom of the left inner wall of the upper machine case is fixedly connected with a left receiving sleeve. A left air cylinder is fixedly installed in the middle of the upper surface of the left receiving sleeve. The lower end of the left air cylinder is fixedly connected with a left clamping plate.

[0023] As a preferred technical solution of the present invention, a stretching cylinder is fixedly installed at the bottom of the right side surface of the upper machine case. A tensile sensor is fixedly installed at the left end of the stretching cylinder. The left end of the tensile sensor is fixedly connected to a right sleeve. The middle part of the upper surface of the right sleeve is fixedly connected to a right cylinder. The lower end of the right cylinder is fixedly connected to a right clamping plate.

[0024] As a preferred technical solution of the present invention, anti - detachment hooks are arranged on the lower surfaces of the left clamping plate and the right clamping plate.

[0025] As a preferred technical solution of the present invention, an internal resistance strip is fixedly connected to the top of the inner walls of both the left sleeve and the right sleeve.

[0026] As a preferred technical solution of the present invention, the compressive - strength detection assembly includes two recovery holes which are respectively opened on the upper surfaces at both ends of the lower support platform. Two collection cylinders are fixedly connected to the lower surfaces at both ends of the lower support platform. An outlet hole is opened at the bottom of each of the opposite surfaces of the two collection cylinders. A lower sealing plate is hinged to the middle position of each of the opposite surfaces of the two collection cylinders through a hinge. A stepped hole is opened in the inner wall at each of the two ends of the two collection cylinders away from each other.

[0027] As a preferred technical solution of the present invention, an outer - pushing column is inserted into the inner cavity of each stepped hole. An inner - pushing plate is fixedly connected to one end of each outer - pushing column located in the stepped hole. An outer - retracting spring is sleeved on the outside of each outer - pushing column away from the collection cylinder, and both ends of each outer - retracting spring are fixedly connected to the opposite surfaces of each outer - pushing column and the collection cylinder respectively. A limiting groove is opened at the middle position of the lower surfaces of the two collection cylinders. An inner - following column is fixedly connected to the middle position of the lower end surface of each inner - pushing plate. An outer - pushing plate is fixedly connected to the middle position of the lower end surface of each lower sealing plate.

[0028] As a preferred technical solution of the present invention, an outer - following block is fixedly connected to the bottom of each of the opposite surfaces of the two lower sealing plates. A lower driving cylinder is fixedly connected to the middle position of the lower surface of the lower support platform. A lower driving block is fixedly connected to the lower end of the lower driving cylinder. Two transmission plates are hinged to the back surfaces of both ends of the lower driving block and the back surfaces of the two outer - following blocks through pin shafts.

[0029] As a preferred technical solution of the present invention, an upper driving cylinder is fixedly installed at the middle position of the upper surface of the upper machine case. A pressure sensor I is fixedly connected to the lower end of the upper driving cylinder. A upper following frame is fixedly connected to the lower end of the pressure sensor I. Two upper pressing blocks are fixedly connected to the bottoms of both ends of the upper following frame.

[0030] As a preferred technical solution of the present invention, two pressure sensors II are fixedly connected to the upper surfaces at both ends of the upper support frame, and a transparent glass is embedded in the front surface of each of the two collection cylinders.

[0031] The beneficial effects of the present invention are as follows:

[0032] 1. For the preparation process of the PAN-based aerogel blanket, by setting the temperature sensor and the heating lamp, first, controlling the start of the heating lamp can heat the test sample on the middle support platform, and then controlling the start of the temperature sensor can synchronously detect the temperature of multiple positions of the sample. Through the detection data of multiple temperature sensors, the heat insulation performance detection of the aerogel blanket can be quickly completed.

[0033] 2. For the preparation process of the PAN-based aerogel blanket, by setting the left cylinder, the left clamping plate, the stretching cylinder, the tensile force sensor, the right cylinder, the right clamping plate and the anti-disengagement hook, first, controlling the start of the left cylinder can drive the left clamping plate to clamp the left end of the sample, and then controlling the start of the right cylinder can drive the right clamping plate to squeeze the right end of the sample. In this way, the clamping of the right end of the sample is quickly completed. Through the coordinated use of the left cylinder and the right cylinder, the clamping and positioning of the sample can be quickly completed. Then, controlling the start of the stretching cylinder can drive the right end of the sample to move to the right. When the sample breaks, the tensile force sensor can timely detect the tensile force value, thus quickly completing the detection of the tensile strength of the sample. This detection method saves time and effort and greatly improves the detection efficiency of the aerogel blanket.

[0034] 3. For the preparation process of the PAN-based aerogel blanket, by setting the internal resistance strip, first, controlling the simultaneous start of the left cylinder and the right cylinder can drive the left clamping plate and the right clamping plate to move upward simultaneously. The simultaneous upward movement of the left clamping plate and the right clamping plate can drive the adhered sample to move upward. At this time, the internal resistance strip can block both ends of the sample, thus effectively completing the automatic blanking of the sample, which can improve the efficiency for subsequent detection.

[0035] 4. The preparation process of the PAN-based aerogel blanket, through the set compressive strength detection component, the first recovery holes can respectively transmit the broken samples into the interiors of two collection cylinders, thus completing the automatic collection of waste materials, effectively avoiding the waste of sample resources and reducing the detection cost of the aerogel blanket. Then, controlling the upper driving cylinder to start can drive the upper pressing block to fully extrude the samples in the collection cylinder. At this time, the pressure sensor 1 can control the pressure of the upper pressing block, so that the compressive strength performance of the aerogel blanket can be quickly detected. Controlling the upper driving cylinder to start again can drive the upper support frame and the pressure sensor 2 to move upward simultaneously. When the pressure sensor 2 moves upward and is in full contact with the top surface of the inner cavity of the upper machine case, at this time, the pressure sensor 2 will control the lower driving cylinder to automatically open. When the lower driving cylinder starts, it can drive two lower sealing plates to automatically open. At this time, the outer receiving springs will pull two outer pushing columns to move in opposite directions. The movement of the two outer pushing columns in opposite directions can drive two inner pushing plates to move in opposite directions. The movement of the two inner pushing plates in opposite directions can quickly push the samples in the collection cylinder to the outside of the discharge hole, thus quickly completing the automatic discharge of waste samples, greatly reducing the labor intensity of the staff. At the same time, it also further improves the practicability of the entire detection device.

[0036] 5. The preparation process of the PAN-based aerogel blanket, through the set tensile detection component and compressive strength detection component, can first conduct composite monitoring on the heat insulation performance and tensile strength of the aerogel blanket, further improving the practicability of the detection device. Then, it can also conduct compressive strength performance detection on the aerogel blanket. Through the combined use of the tensile detection component and the compressive strength detection component, various performance detections of the aerogel blanket can be effectively completed, reducing the handling steps of the samples and greatly improving the use experience of the staff.

[0037] 6. The preparation process of the PAN-based aerogel blanket, through the set two collection cylinders, the two collection cylinders can respectively collect the two sections after the sample breaks, and the two collection cylinders facilitate the upper pressing block to respectively detect samples of different sizes, thus facilitating the staff to compare and record samples of different sizes, and improving the accuracy of the detection results of the aerogel blanket. Description of the Drawings

[0038] The drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0039] In the drawings:

[0040] Figure 1 is the structural schematic diagram of the present invention;

[0041] Figure 2 is the front view of the present invention;

[0042] Figure 3 is a schematic structural view of the right side perspective of the present invention;

[0043] Figure 4 is a schematic structural view of the bottom perspective of the present invention;

[0044] Figure 5 is a front cross-sectional view of the present invention;

[0045] Figure 6 is of the present invention Figure 5 three-dimensional view;

[0046] Figure 7 is of the present invention Figure 6 schematic structural view of the bottom perspective;

[0047] Figure 8 is a schematic view of the connection structure between the middle support platform and the heating lamp of the present invention;

[0048] Figure 9 is of the present invention Figure 8 schematic structural view of the rear perspective;

[0049] Figure 10 is of the present invention Figure 7 enlarged view at A in;

[0050] Figure 11 is of the present invention Figure 7 enlarged view at B in;

[0051] Figure 12 is of the present invention Figure 7 enlarged view at C in.

[0052] In the figure: 1, lower support platform; 2, upper chassis; 3, stretching detection component; 301, middle support platform; 302, temperature sensor; 303, rear support; 304, heating lamp; 305, left sleeve; 306, left cylinder; 307, left clamping plate; 308, stretching cylinder; 309, tension sensor; 310, right sleeve; 311, right cylinder; 312, right clamping plate; 313, anti-disengagement hook; 314, internal resistance bar; 4, compressive strength detection component; 401, recovery hole; 402, collection cylinder; 403, discharge hole; 404, lower sealing plate; 405, stepped hole; 406, external push column; 407, internal push plate; 408, external recovery spring; 409, limiting groove; 410, internal follower column; 411, external push plate; 412, external follower block; 413, lower driving cylinder; 414, lower driving block; 415, transmission plate; 416, upper driving cylinder; 417, pressure sensor one; 418, upper follower frame; 419, upper pressing block; 420, pressure sensor two; 421, transparent glass; 5, processing box. Detailed implementation manners

[0053] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0054] Embodiment: As Figures 1-12 shown, a preparation process of a pre-oxidized fiber aerogel blanket of the present invention includes the following steps:

[0055] S1. Raw material preparation:

[0056] Polymer selection: Select a suitable polymer as the precursor material, usually an organosilicon polymer or polyamide, etc.; Solvent selection: Select an appropriate solvent according to the properties of the polymer, such as alcohol or ether solvents, to facilitate the subsequent sol-gel reaction;

[0057] S2. Sol preparation:

[0058] Dissolution: Dissolve the polymer in the selected solvent to obtain a uniform polymer solution; Additives addition: According to needs, add catalysts (such as acids or bases) and crosslinking agents to promote the subsequent polymerization reaction;

[0059] S3. Gelation:

[0060] Reaction conditions: Under certain temperature and time, let the sol undergo a gelation reaction to form a gel with a network structure; Molding: Pour the gel into a mold for molding to form the required thin blanket shape;

[0061] S4. Dehydration:

[0062] Supercritical drying: Use supercritical carbon dioxide or other solvents for dehydration to remove the solvent in the gel and prevent structural collapse; Conventional drying: Conduct drying under conventional conditions, usually using vacuum or hot air drying;

[0063] S5. Pre-oxidation treatment:

[0064] Heat treatment: Pre-oxidize the dried aerogel blanket, usually heat it to a certain temperature in an air or oxygen atmosphere to promote the oxidative decomposition of organic matter and form an inorganic skeleton; Temperature control: Control the heating rate and final temperature to obtain ideal aerogel properties;

[0065] S6. Post-treatment:

[0066] Surface modification: According to application requirements, conduct surface modification treatment, such as coating a waterproof agent or antibacterial agent to enhance the functionality of the aerogel; Performance testing: Conduct performance testing on the aerogel blanket, including thermal conductivity, density, strength, etc., to ensure that it meets the usage requirements;

[0067] S7. Storage and packaging:

[0068] Storage: Store in a dry and cool environment, avoiding moisture and high temperature; Packaging: Use appropriate packaging materials to ensure that the aerogel blanket is not damaged during transportation and storage;

[0069] The performance detection device required for the above post-treatment includes a lower support table 1. The upper surface of the lower support table 1 is fixedly connected with an upper machine case 2. Tensile detection components 3 are fixedly installed on the upper surface of the lower support table 1 and the inner walls of both sides of the upper machine case 2, which are used to detect the strength and heat insulation performance of the pre-oxidized fiber aerogel blanket. Compressive detection components 4 are installed on the upper surface of the upper machine case 2 and the lower surface of the lower support table 1, which are used to detect the compressive performance of the pre-oxidized fiber aerogel blanket. A processing box 5 is fixedly installed at the top of the right side surface of the upper machine case 2, which is used to control the tensile detection component 3 and the compressive detection component 4; The tensile detection component 3 includes a middle support table 301. The lower end of the middle support table 301 is fixedly connected with the middle part of the upper surface of the lower support table 1. A plurality of temperature sensors 302 are embedded in the upper surface of the middle support table 301. The upper surface of the rear end of the middle support table 301 is fixedly connected with a rear support 303. A heating lamp 304 is fixedly installed at the upper end of the rear support 303. The bottom of the left inner wall of the upper machine case 2 is fixedly connected with a left sleeve 305. The middle part of the upper surface of the left sleeve 305 is fixedly installed with a left air cylinder 306. The lower end of the left air cylinder 306 is fixedly connected with a left clamping plate 307.

[0070] Among them, through the set tensile detection component 3, first controlling the left air cylinder 306 to start can drive the left clamping plate 307 to move downward. When the left clamping plate 307 and the anti-disengagement hook 313 fully squeeze the sample, the clamping of the left end of the sample is quickly completed. Then controlling the right air cylinder 311 to start can drive the right clamping plate 312 and the anti-disengagement hook 313 to move downward at the same time. When the right clamping plate 312 and the anti-disengagement hook 313 fully squeeze the right end of the sample, the clamping of the right end of the sample is quickly completed. Through the combined use of the left air cylinder 306 and the right air cylinder 311, the clamping and positioning of the sample can be quickly completed. Then controlling the heating lamp 304 to start can heat the test sample on the middle support table 301. Then controlling the temperature sensors 302 to start can synchronously detect the temperature of multiple positions of the sample. Through the detection data of the multiple temperature sensors 302, the heat insulation performance detection of the aerogel blanket can be quickly completed. Then controlling the tensile air cylinder 308 to start can drive the tension sensor 309 and the right sleeve 310 to move to the right at the same time. The rightward movement of the right sleeve 310 can drive the right end of the sample to move to the right. When the sample breaks, the tension sensor 309 can timely detect the tension value, thus quickly completing the detection of the tensile strength of the sample. This detection method saves time and effort and greatly improves the detection efficiency of the aerogel blanket.

[0071] A stretching cylinder 308 is fixedly installed at the bottom of the right side of the upper chassis 2, a tension sensor 309 is fixedly installed at the left end of the stretching cylinder 308, a right containment sleeve 310 is fixedly connected to the left end of the tension sensor 309, a right cylinder 311 is fixedly connected to the middle of the upper surface of the right containment sleeve 310, and a right clamping plate 312 is fixedly connected to the lower end of the right cylinder 311; anti-detachment hooks 313 are provided on the lower surfaces of the left clamping plate 307 and the right clamping plate 312; an internal resistance strip 314 is fixedly connected to the top of the inner walls of the left containment sleeve 305 and the right containment sleeve 310.

[0072] Among them, by setting up the internal resistance bar 314, firstly controlling the left cylinder 306 and the right cylinder 311 to start at the same time can drive the left clamping plate 307 and the right clamping plate 312 to move upward at the same time, and the left clamping plate 307 and the right clamping plate 312 moving upward at the same time can drive the adhered sample to move upward, and at this time the internal resistance bar 314 can block both ends of the sample, thereby effectively completing the automatic removal of the sample, which can improve the efficiency of subsequent detection.

[0073] The compressive resistance detection component 4 includes two recovery holes 401, and the two recovery holes 401 are respectively opened on the upper surfaces at both ends of the lower support platform 1. At the lower surfaces at both ends of the lower support platform 1, two collection cylinders 402 are fixedly connected. At the bottoms of the opposite sides of the two collection cylinders 402, a discharge hole 403 is opened. At the middle positions of the opposite sides of the two collection cylinders 402, a lower sealing plate 404 is hinged through a hinge. At the inner walls of the two ends of the two collection cylinders 402 away from each other, a stepped hole 405 is opened; in the inner cavity of each stepped hole 405, an outer push column 406 is inserted. At one end of each outer push column 406 located in the stepped hole 405, an inner push plate 407 is fixedly connected. At the outside of the end of each outer push column 406 away from the collection cylinder 402, an outer recovery spring 408 is sleeved, and the two ends of each outer recovery spring 408 are respectively fixedly connected to the opposite sides of each outer push column 406 and the collection cylinder 402. At the middle positions of the lower surfaces of the two collection cylinders 402, a limit groove 409 is opened. At the middle positions of the lower end surfaces of each inner push plate 407, an inner follower column 410 is fixedly connected. At the middle positions of the lower end surfaces of each lower sealing plate 404, an outer push plate 411 is fixedly connected; at the bottoms of the opposite sides of the two lower sealing plates 404, an outer follower block 412 is fixedly connected. At the middle position of the lower surface of the lower support platform 1, a lower driving cylinder 413 is fixedly connected. At the lower end of the lower driving cylinder 413, a lower driving block 414 is fixedly connected. At the backs of both ends of the lower driving block 414 and the backs of the two outer follower blocks 412, two transmission plates 415 are hinged through a pin shaft; at the middle position of the upper surface of the upper machine case 2, an upper driving cylinder 416 is fixedly installed. At the lower end of the upper driving cylinder 416, a pressure sensor 1 417 is fixedly connected. At the lower end of the pressure sensor 1 417, an upper follower frame 418 is fixedly connected. At the bottoms of both ends of the upper follower frame 418, two upper pressing blocks 419 are fixedly connected; at the upper surfaces of both ends of the upper follower frame 418, two pressure sensors 2 420 are fixedly connected. On the front surfaces of the two collection cylinders 402, a transparent glass 421 is embedded.

[0074] Among them, through the set compressive strength detection component 4, first, the recovery hole 401 can transmit the fractured samples into the interiors of the two collection cylinders 402 respectively, thus completing the automatic collection of waste materials and effectively avoiding the waste of sample resources. Then, controlling the upper driving cylinder 416 to start can drive the upper slave frame 418 and the upper pressing block 419 to move downward simultaneously. When the upper pressing block 419 presses the samples in the collection cylinder 402 downward sufficiently, at this time, the pressure sensor 1 417 can control the pressure of the upper pressing block 419, so that the compressive strength performance detection of the aerogel blanket can be quickly completed. Controlling the upper driving cylinder 416 to start again can drive the upper slave frame 418 and the pressure sensor 2 420 to move upward simultaneously. When the pressure sensor 2 420 moves upward and is in full contact with the top surface of the inner cavity of the upper chassis 2, at this time, the pressure sensor 2 420 will control the lower driving cylinder 413 to automatically start. The start of the lower driving cylinder 413 can drive the lower driving block 414 to move upward. The upward movement of the lower driving block 414 can drive the mutually separated ends of the two transmission plates 415 to move closer. The movement of the mutually separated ends of the two transmission plates 415 closer can drive the two outer slave blocks 412 to move in opposite directions. The movement of the two outer slave blocks 412 in opposite directions can drive the two lower sealing plates 404 to automatically open. At this time, the outer receiving spring 408 will pull the two outer pushing columns 406 to move in opposite directions. The movement of the two outer pushing columns 406 in opposite directions can drive the two inner pushing plates 407 to move in opposite directions. The movement of the two inner pushing plates 407 in opposite directions can quickly push the samples in the collection cylinder 402 to the outside of the discharge hole 403, thus quickly completing the automatic discharge of the waste material samples, greatly reducing the labor intensity of the staff. At the same time, the practicability of the entire detection device is further improved.

[0075] During operation, first place the two ends of the test sample into the inner parts of the left holder 305 and the right holder 310 respectively. At this time, starting the left cylinder 306 can drive the left clamping plate 307 to move downward. When the left clamping plate 307 and the anti-disengagement hook 313 are fully pressed against the sample, the clamping of the left end of the sample is quickly completed. Then, starting the right cylinder 311 can drive the right clamping plate 312 and the anti-disengagement hook 313 to move downward simultaneously. When the right clamping plate 312 and the anti-disengagement hook 313 are fully pressed against the right end of the sample, the clamping of the right end of the sample is quickly completed. By the combined use of the left cylinder 306 and the right cylinder 311, the clamping and positioning of the sample can be quickly completed. Then, starting the heating lamp 304 can heat the test sample on the middle support platform 301. Then, starting the temperature sensor 302 can perform synchronous temperature detection on multiple orientations of the sample. Through the detection data of multiple temperature sensors 302, the heat insulation performance detection of the aerogel blanket can be quickly completed. Then, starting the stretching cylinder 308 can drive the tension sensor 309 and the right holder 310 to move rightward simultaneously. The rightward movement of the right holder 310 can drive the right end of the sample to move rightward. When the sample breaks, the tension sensor 309 can timely detect the tension value, thus quickly completing the detection of the tensile strength of the sample;

[0076] Compressive property detection: First, control the simultaneous startup of the left cylinder 306 and the right cylinder 311, which can drive the left clamping plate 307 and the right clamping plate 312 to move upward simultaneously. When the left clamping plate 307 and the right clamping plate 312 move upward simultaneously, they can drive the adhered sample to move upward. At this time, the internal resistance strip 314 can block both ends of the sample, thus effectively completing the automatic blanking of the sample. At this time, the recovery hole 401 can transmit the fractured samples to the inside of the two collection cylinders 402 respectively, thus completing the automatic collection of waste materials and effectively avoiding the waste of sample resources. Then, control the startup of the upper driving cylinder 416, which can drive the upper slave frame 418 and the upper pressing block 419 to move downward simultaneously. When the upper pressing block 419 presses down on the sample in the collection cylinder 402 sufficiently, the pressure sensor 1 417 can control the pressure of the upper pressing block 419, thereby quickly completing the detection of the compressive property of the aerogel blanket. Among them, the staff can clearly see the changes in the sample after extrusion through the transparent glass 421, which is convenient for the staff to record the extrusion states of samples of different sizes. Control the startup of the upper driving cylinder 416 again, which can drive the upper slave frame 418 and the pressure sensor 2 420 to move upward simultaneously. When the pressure sensor 2 420 moves upward and is in full contact with the top surface of the inner cavity of the upper chassis 2, the pressure sensor 2 420 will control the automatic opening of the lower driving cylinder 413. When the lower driving cylinder 413 starts, it can drive the lower driving block 414 to move upward. When the lower driving block 414 moves upward, it can drive the two transmission plates 415 to move closer at the ends that are away from each other. When the two transmission plates 415 move closer at the ends that are away from each other, it can drive the two outer slave blocks 412 to move in opposite directions. When the two outer slave blocks 412 move in opposite directions, it can drive the two lower sealing plates 404 to open automatically. At this time, the outer recovery spring 408 will pull the two outer push columns 406 to move in opposite directions. When the two outer push columns 406 move in opposite directions, it can drive the two inner push plates 407 to move in opposite directions. When the two inner push plates 407 move in opposite directions, it can quickly push the sample in the collection cylinder 402 to the outside of the discharge hole 403, thus quickly completing the automatic discharge of the waste sample;

[0077] Reuse of the compressive strength detection component 4: First, control the upper driving cylinder 416 to start, which can drive the second pressure sensor 420 away from the inner wall of the upper chassis 2. At this time, the lower driving cylinder 413 will be started again. When the lower driving cylinder 413 starts, it can drive the lower driving block 414 to move downward. When the lower driving block 414 moves downward, it can drive the separated ends of the two transmission plates 415 to respectively push the two outer follower blocks 412. When the two outer follower blocks 412 move in opposite directions, they can drive the two lower sealing plates 404 to seal the discharge hole 403 again. Among them, when the two lower sealing plates 404 move in opposite directions, they will also drive the two outer pushing plates 411 to move in opposite directions. When the two outer pushing plates 411 move in opposite directions, they can push the two inner follower columns 410 and the two inner pushing plates 407 to move in opposite directions simultaneously. When the two inner pushing plates 407 fully move into the two stepped holes 405, the automatic return of the inner pushing plate 407 is quickly completed at this time, thereby enabling the entire compressive strength detection component 4 to be continuously used.

[0078] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preparation process of a pre-oxidized silk aerogel blanket, characterized in that: The following steps are involved: S1. Raw material preparation: Polymer selection: Select a suitable polymer as the precursor material, usually silicone polymer or polyamide; Solvent selection: Select an appropriate solvent according to the properties of the polymer, such as alcohol or ether solvent, to facilitate the subsequent sol-gel reaction; S2. Sol preparation: Dissolving: dissolving the polymer in a selected solvent to obtain a uniform polymer solution; Adding additives: adding catalysts (such as acids or bases) and cross-linking agents as needed to promote subsequent polymerization reactions; S3, gelation: Reaction conditions: at a certain temperature and time, the sol is allowed to undergo a gelation reaction to form a gel with a network structure; Molding: the gel is poured into a mold for molding to form the desired blanket shape; S4. Dehydration: Supercritical drying: using supercritical carbon dioxide or other solvents to dehydrate and remove the solvent in the gel to prevent structural collapse; Conventional drying: drying under conventional conditions, usually vacuum or hot air drying; S5. Pre-oxidation treatment: Heat treatment: pre-oxidize the dried aerogel blanket, usually heated to a certain temperature in air or oxygen atmosphere to promote the oxidative decomposition of organic matter and form an inorganic skeleton; Temperature control: control the heating rate and final temperature to obtain the ideal aerogel properties; S6. Post-processing: Surface modification: According to application requirements, surface modification treatment is carried out, such as coating with waterproof agent or antibacterial agent, to enhance the functionality of aerogel; Performance testing: The aerogel blanket is tested for performance, including thermal conductivity, density, strength, etc., through performance testing equipment to ensure that it meets the use requirements; S7. Storage and packaging: Storage: Store in a dry, cool environment, avoid moisture and high temperature; Packaging: Use appropriate packaging materials to ensure that the aerogel blanket is not damaged during transportation and storage; The performance detection device used in the above-mentioned post-processing comprises a lower support platform (1), the upper surface of the lower support platform (1) is fixedly connected to an upper chassis (2), the upper surface of the lower support platform (1) and the inner walls on both sides of the upper chassis (2) are fixedly mounted with tensile detection components (3) for detecting the strength and thermal insulation performance of the pre-oxidized silk aerogel blanket, the upper surface of the upper chassis (2) and the lower surface of the lower support platform (1) are fixedly mounted with compression detection components (4) for detecting the compression performance of the pre-oxidized silk aerogel blanket, and the top of the right side of the upper chassis (2) is fixedly mounted with a processing box (5) for controlling the tensile detection component (3) and the compression detection component (4).

2. The preparation process of a pre-oxidized silk aerogel blanket according to claim 1, characterized in that: The stretch detection assembly (3) comprises a middle support platform (301), the lower end of the middle support platform (301) is fixedly connected to the middle part of the upper surface of the lower support platform (1), a plurality of temperature sensors (302) are embedded in the upper surface of the middle support platform (301), a rear support (303) is fixedly connected to the upper surface of the rear end of the middle support platform (301), a heating lamp (304) is fixedly installed on the upper end of the rear support (303), a left housing (305) is fixedly connected to the bottom of the left inner wall of the upper case (2), a left cylinder (306) is fixedly installed in the middle part of the upper surface of the left housing (305), and a left clamping plate (307) is fixedly connected to the lower end of the left cylinder (306).

3. A performance detection device according to claim 2, characterized in that: A stretching cylinder (308) is fixedly mounted on the bottom of the right side of the upper chassis (2); a tension sensor (309) is fixedly mounted on the left end of the stretching cylinder (308); a right housing (310) is fixedly connected to the left end of the tension sensor (309); a right cylinder (311) is fixedly connected to the middle of the upper surface of the right housing (310); and a right clamping plate (312) is fixedly connected to the lower end of the right cylinder (311).

4. A performance detection device according to claim 3, characterized in that: Anti-drop hooks (313) are provided on the lower surfaces of the left clamping plate (307) and the right clamping plate (312).

5. A performance detection device according to claim 4, characterized in that: An internal resistance strip (314) is fixedly connected to the top of the inner wall of the left containment sleeve (305) and the inner wall of the right containment sleeve (310).

6. A performance detection device according to claim 5, characterized in that: The compression resistance detection component (4) comprises two recovery holes (401), the two recovery holes (401) are respectively opened on the upper surface at both ends of the lower support platform (1), the lower surface at both ends of the lower support platform (1) is fixedly connected to two collecting barrels (402), the bottom of the two collecting barrels (402) on the opposite side thereof is provided with a discharge hole (403), the middle position of the opposite side of the two collecting barrels (402) is hinged with a lower sealing plate (404) through a hinge, and the inner wall of the two collecting barrels (402) away from one end thereof is provided with a stepped hole (405).

7. A performance detection device according to claim 6, characterized in that: An outward push column (406) is inserted into the inner cavity of each stepped hole (405), and one end of each outward push column (406) provided on the stepped hole (405) is fixedly connected to an inner push plate (407), and the outer portion of each outward push column (406) away from the collecting tube (402) is sleeved with an outward spring (408), and the two ends of each outward spring (408) are respectively fixedly connected to the opposite side of each outward push column (406) and the collecting tube (402), and a limiting groove (409) is provided in the middle position of the lower surface of the two collecting tubes (402), and the middle position of the lower end surface of each inner push plate (407) is fixedly connected to an inner follower column (410), and the middle position of the lower end surface of each lower sealing plate (404) is fixedly connected to an outward push plate (411).

8. A performance detection device according to claim 7, characterized in that: An outer follower block (412) is fixedly connected to the bottom of the opposite side of the two lower sealing plates (404), a lower drive cylinder (413) is fixedly connected to the middle position of the lower surface of the lower support platform (1), a lower drive block (414) is fixedly connected to the lower end of the lower drive cylinder (413), and the back sides of both ends of the lower drive block (414) and the back sides of the two outer follower blocks (412) are hingedly connected to two transmission plates (415) via pins.

9. A performance detection device according to claim 8, characterized in that: An upper drive cylinder (416) is fixedly mounted in the middle of the upper surface of the upper chassis (2); a pressure sensor 1 (417) is fixedly connected to the lower end of the upper drive cylinder (416); an upper slave frame (418) is fixedly connected to the lower end of the pressure sensor 1 (417); two upper pressure blocks (419) are fixedly connected to the bottoms of both ends of the upper slave frame (418).

10. A performance detection device according to claim 9, characterized in that: Two pressure sensors 2 (420) are fixedly connected to the upper surfaces of both ends of the upper slave frame (418), and a transparent glass (421) is embedded in the front of each of the two collecting cylinders (402).

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