Impact resistant material and impact resistant thermal management material

Abstract

The application belongs to the field of impact-resistant materials and thermal management, and discloses an impact-resistant material and an impact-resistant thermal management material. The impact-resistant material can significantly reduce the impact peak force, prolong the buffering time during impact, and has low thermal conductivity, low thermal diffusion coefficient and low infrared emissivity, and can provide double protection functions of mechanical impact resistance and thermal damage resistance.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of impact resistant materials and thermal management, in particular to an impact resistant material and an impact resistant thermal management material. BACKGROUND

[0002] Impact-resistant materials have broad application prospects in personal protection, transportation and aerospace, etc. (Ishchenko A N, Tabachenko A N, Akinshin R N, et al. Development and investigation of a two-layer metal-ceramic material for protective barriers in conditions of high-speed impact [J]. Technical Physics, 2018, 63(7):988-994. Sisan M M, Eslami-Farsani R. An experimental study on impact resistance of different layup configuration of fiber metal laminates[J]. Fibers and Polymers, 2019, 20(10): 2200-2206. Yuan Z, Yang G, Yang Z, et al. Effect of metal-fiber shear interaction on curing deformation of fiber metal laminates[J]. Arabian Journal for Science and Engineering,2020, 45(7): 5375-5384.).In recent years, researchers have developed a variety of new impact-resistant materials, such as impact-resistant protective materials based on high-performance fibers such as carbon fibers, aramid fibers (Kevlar), ultra-high molecular weight polyethylene fibers (UHMWPE), etc. The research focus is to improve the impact-resistant performance of impact-resistant protective materials (Cheeseman B A, Bogetti T A, Ballistic impact into fabric and compliant composite laminates [J]. Composite Structures, 2003, 61:161-173. Park J H, Rutledge GC, Ultrafine high performance polyethylene fibers [J]. Journal of Materials Science, 2018, 53: 3049-3063. Priyanka P, Dixit A, Mali H S, High strength Kevlar fiber reinforced advanced textile composites [J]. Iranian Polymer Journal, 2019, 28: 621-638.). However, flexible impact-resistant materials with only a single impact-resistant protective function cannot simultaneously meet the demand for protection against other forms of damage risk such as thermal damage. Therefore, there is an urgent need to develop new impact-resistant materials with thermal management functions.

[0003] In view of this, the present application is proposed. SUMMARY

[0004] To solve the problems in the background art, the present application aims to provide an impact-resistant material and an impact-resistant thermal management material.

[0005] The first aspect of the present application provides an impact-resistant material, which is a collagen fiber reinforced non-Newtonian gel prepared by mixing collagen fibers and non-Newtonian gel through a mixing process.

[0006] Preferably, the mass ratio of the collagen fibers to the non-Newtonian gel is 1: (8-40).

[0007] Preferably, the non-Newtonian gel is prepared from hydroxy silicone oil, hydrophobic fumed silica and boric acid.

[0008] Preferably, the mixing process uses benzoyl peroxide as a vulcanizing agent.

[0009] The second aspect of the present application provides an anti-impact thermal management material, which is a sandwich structure material prepared by taking the anti-impact material as a core material and the collagen fiber-based porous aerogel as a shell layer.

[0010] Preferably, the collagen fiber-based porous aerogel is a porous aerogel constructed by nano-silica modified collagen fibers.

[0011] Preferably, the collagen fiber-based porous aerogel is prepared by reacting the nano-silica modified collagen fibers with a sodium alginate solution and then freeze-drying.

[0012] Preferably, the nano-silica modified collagen fibers are prepared by in-situ hydrolysis of tetraethyl orthosilicate on the surface of collagen fibers.

[0013] Compared with the prior art, the present application has the following beneficial effects:

[0014] 1. The anti-impact material provided by the present application has excellent anti-impact protection function, and can reduce the impact peak force by 75.3% and prolong the buffer time during impact by 59.9%;

[0015] 2. The traditional anti-impact material only has a single anti-impact protection function, while the anti-impact thermal management material provided by the present application can realize dual protection of anti-mechanical impact and anti-thermal damage, and provides protection for personnel under impact load, high temperature and high heat conditions;

[0016] 3. The anti-impact thermal management material provided by the present application exhibits excellent anti-impact performance, and can reduce the impact peak force by 70.0% and prolong the buffer time during impact by 41.1%. In the same condition of mechanical impact test, compared with steel plate, melamine foam and collagen fiber-based porous aerogel, etc. rigid and soft materials, the anti-impact thermal management material exhibits more excellent anti-impact protection performance;

[0017] 4. The anti-impact thermal management material provided by the present application has low thermal conductivity (0.12 W m -1 k -1 ), low thermal diffusivity (0.09 mm 2 s -1 ) and low infrared emissivity (0.78), which can effectively inhibit heat convection / thermal radiation and other heat exchange modes, and realize thermal insulation management. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The storage modulus-shear frequency curves of the anti-impact material-1 in Example 1, the anti-impact material-2 in Example 2, the anti-impact material-3 in Example 3, the anti-impact material-4 in Example 4, the anti-impact material-5 in Example 5 and the control sample in Comparative Example 1;

[0019] Figure 2 Peak force and cushion time at drop heights of 25 mm, 50 mm, 75 mm, 100 mm, 125 mm, and 150 mm for Impact Resistant Material-1 in Example 1, Impact Resistant Material-2 in Example 2, Impact Resistant Material-3 in Example 3, Impact Resistant Material-4 in Example 4, and Impact Resistant Material-5 in Example 5, and backside light microscope pictures after impact at 150 mm drop height;

[0020] Figure 3 Peak force and cushion time at drop heights of 50 mm, 75 mm, 100 mm, 125 mm, and 150 mm for Impact Resistant Thermal Management Material in Example 6 and Blank Control in Comparative Example 1, and backside light microscope pictures after impact at 50 mm, 75 mm, 100 mm, 125 mm, and 150 mm drop height for Impact Resistant Thermal Management Material in Example 6;

[0021] Figure 4 Peak force and cushion time at drop heights of 50 mm, 75 mm, 100 mm, 125 mm, and 150 mm for Impact Resistant Material-4 in Example 4, Control Sample in Comparative Example 1, and Blank Control;

[0022] Figure 5 Comparison of impact resistance of steel plate, melamine foam, collagen fiber-based porous aerogel in Example 6, and Impact Resistant Thermal Management Material;

[0023] Figure 6 Surface temperature difference (ΔT) when heated with a heating lamp (250 W) for 30 min for Impact Resistant Material-4 in Example 4 and Impact Resistant Thermal Management Material in Example 6. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions, and advantages of the present application clearer, the present application will be described in further detail below with reference to specific embodiments and drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of well-known structures and techniques is omitted to avoid unnecessary confusion of the concept of the present application. The specific conditions not mentioned in the examples are carried out according to the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments not mentioned by the manufacturer are all conventional products that can be purchased on the market.

[0025] Example 1

[0026] (1) Preparation of impact-resistant material-1: 7.5 g of hydrophobic fumed silica was dispersed into 150 mL of hydroxyl silicone oil, then 11.5 g of boric acid was added into the above mixture, which was sheared at 500 rpm, 120 o C for 3.0 h, and then cooled to room temperature to obtain an elastic non-Newtonian gel (ENG). 40 g of the ENG was placed in a torque rheometer at a rotation speed of 120 rpm and a temperature of 80 o C for 2.0 min, then 1.6 g of benzoyl peroxide was added for vulcanization, 1.0 g of collagen fibers was added for mixing after 2.0 min, and the mixture was taken out and left to stand for 24 h at 50 o C and 5.0 MPa for 10 min to obtain the impact-resistant material-1.

[0027] (2) The impact-resistant material-1 prepared in this example was subjected to frequency sweep test using a rotary rheometer (TA-AR2000ex, USA). As shown in FIG. 1, in the frequency range of 0.1-100 Hz, the storage modulus of the impact-resistant material-1 showed a significant upward trend, from 193 Pa to 0.066 MPa, exhibiting shear hardening characteristics. Figure 1

[0028] (3) The impact-resistant material-1 prepared in this example was subjected to impact resistance test: the impact-resistant material-1 was placed on the impact platform of a drop hammer impact testing machine CLC-AI (Beijing Guanmei Jingdian Instrument and Equipment Co., Ltd.), and a hammer head (Φ20 mm, 2.36 kg) was used to perform drop hammer impact test at a height of 25 mm, 50 mm, 75 mm, 100 mm, 125 mm and 150 mm. As shown in FIG. 2a and FIG. 2b, the peak force was 85 N, 110 N, 161 N, 270 N, 363 N and 485 N, respectively, and the buffer time was 3.897 ms, 3.653 ms, 3.438 ms, 3.067 ms, 2.933 ms and 2.564 ms, respectively. Figure 2 a、 Figure 2 b.

[0029] (4) The back surface of the impact-resistant material-1 in Example (3) after being impacted at a drop hammer height of 150 mm was subjected to stereomicroscope shooting (FIG. 3c). Figure 2 c.

[0030] Example 2

[0031] ​(1) Preparation of impact-resistant material-2: 7.5 g of hydrophobic fumed silica was dispersed into 150 mL of hydroxyl silicone oil, then 11.5 g of boric acid was added into the above mixture, sheared at 500 rpm, 120 o C for 3.0 h, and then cooled to room temperature to obtain an elastic non-Newtonian gel (ENG). 40 g of the ENG was placed in a torque rheometer at a rotation speed of 120 rpm and a temperature of 80 o C for 2.0 min, then 1.6 g of benzoyl peroxide was added for vulcanization, 2.0 g of collagen fibers was added for mixing after 2.0 min, and the mixture was taken out and left to stand for 24 h at 50 o C and 5.0 MPa for 10 min to obtain the impact-resistant material-2.

[0032] (2) The impact-resistant material-2 prepared in this example was subjected to frequency sweep test using a rotary rheometer (TA-AR2000ex, USA). As shown in FIG. 1, in the frequency range of 0.1-100 Hz, the storage modulus of the impact-resistant material-2 showed a significant upward trend, from 1093 Pa to 0.13 MPa, exhibiting shear hardening characteristics. Figure 1

[0033] (3) The impact-resistant material-2 prepared in this example was subjected to impact resistance test: the impact-resistant material-2 was placed on the impact platform of a drop hammer impact testing machine CLC-AI (Beijing Guanmei Jingdian Instrument and Equipment Co., Ltd.), and a hammer head (Φ20 mm, 2.36 kg) was used to perform drop hammer impact test at a height of 25 mm, 50 mm, 75 mm, 100 mm, 125 mm and 150 mm. As shown in FIG. 2a and FIG. 2b, the peak force was 94 N, 121 N, 157 N, 232 N, 310 N and 407 N, respectively, and the buffer time was 3.551 ms, 3.483 ms, 3.321 ms, 3.150 ms, 3.005 ms and 2.678 ms, respectively. Figure 2 a、 Figure 2 b.

[0034] (4) The back surface of the impact-resistant material-2 subjected to impact at a height of 150 mm in (3) of this example was subjected to stereomicroscope shooting (FIG. 3c). Figure 2 c.

[0035] Example 3

[0036] ​(1) Preparation of impact-resistant material-3: 7.5 g of hydrophobic fumed silica was dispersed into 150 mL of hydroxyl silicone oil, then 11.5 g of boric acid was added into the above mixture, which was sheared at 500 rpm, 120 o C for 3.0 h, and then cooled to room temperature to obtain an elastic non-Newtonian gel (ENG). 40 g of the ENG was placed in a torque rheometer at a rotation speed of 120 rpm, a temperature of 80 o C for 2.0 min, then 1.6 g of benzoyl peroxide was added for vulcanization, 3.0 g of collagen fibers was added for mixing after 2.0 min, and the mixture was taken out and left to stand for 24 h at 50 o C and 5.0 MPa for 10 min to obtain the impact-resistant material-3.

[0037] (2) The impact-resistant material-3 prepared in this example was subjected to frequency sweep test by using a rotary rheometer (TA-AR2000ex, USA). As shown in FIG. 2, in the frequency range of 0.1-100 Hz, the storage modulus of the impact-resistant material-3 showed a significant upward trend, from 1260 Pa to 0.16 MPa, exhibiting shear hardening characteristics. Figure 1

[0038] (3) The impact-resistant material-3 prepared in this example was subjected to impact resistance test: the impact-resistant material-3 was placed on the impact platform of a drop hammer impact testing machine CLC-AI (Beijing Guanmei Jingdian Instrument and Equipment Co., Ltd.), and a hammer head (Φ20 mm, 2.36 kg) was used to perform drop hammer impact test at a height of 25 mm, 50 mm, 75 mm, 100 mm, 125 mm and 150 mm. As shown in FIG. 3a and FIG. 3b, the peak force was 96 N, 119 N, 156 N, 217 N, 271 N and 354 N, respectively, and the buffer time was 3.383 ms, 3.397 ms, 3.367 ms, 3.295 ms, 3.171 ms and 2.749 ms, respectively. Figure 2 Figure 2

[0039] (4) The back surface of the impact-resistant material-3 in Example (3) after being impacted at a drop hammer height of 150 mm was subjected to stereomicroscope shooting (FIG. 3c). Figure 2

[0040] Example 4

[0041] ​​​​(1) Preparation of impact-resistant material-4: 7.5 g of hydrophobic fumed silica was dispersed into 150 mL of hydroxyl silicone oil, then 11.5 g of boric acid was added into the above mixture, sheared at 500 rpm, 120 o C for 3.0 h, and then cooled to room temperature to obtain an elastic non-Newtonian gel (ENG). 40 g of the ENG was placed in a torque rheometer at a rotation speed of 120 rpm and a temperature of 80 o C for 2.0 min, then 1.6 g of benzoyl peroxide was added for vulcanization, 4.0 g of collagen fibers was added for mixing after 2.0 min, and the mixture was taken out and left to stand for 24 h at 50 o C and 5.0 MPa for 10 min to obtain the impact-resistant material-4.

[0042] (2) The impact-resistant material-4 prepared in this example was subjected to frequency sweep test using a rotary rheometer (TA-AR2000ex, USA). As shown in FIG. 1, within the frequency range of 0.1-100 Hz, the storage modulus of the impact-resistant material-4 showed a significant upward trend, from 3814 Pa to 0.29 MPa, exhibiting shear hardening characteristics. Figure 1

[0043] (3) The impact-resistant material-4 prepared in this example was subjected to impact resistance performance test: the impact-resistant material-4 was placed on the impact platform of a drop hammer impact testing machine CLC-AI (Beijing Guanmei Jingdian Instrument and Equipment Co., Ltd.), and a hammer head (Φ20 mm, 2.36 kg) was used to perform drop hammer impact test at heights of 25 mm, 50 mm, 75 mm, 100 mm, 125 mm and 150 mm. As shown in FIG. 2a and FIG. 2b, the peak forces were 98 N, 119 N, 160 N, 210 N, 252 N and 297 N, respectively, and the buffer times were 3.533 ms, 3.442 ms, 3.320 ms, 3.339 ms, 3.119 ms and 3.071 ms, respectively. Figure 2 a、 Figure 2 b.

[0044] (4) The back surface of the impact-resistant material-4 subjected to impact at a height of 150 mm in (3) of this example was subjected to stereomicroscope shooting (FIG. 3c). Figure 2

[0045] (5) The impact-resistant material-4 prepared in this example was subjected to thermal performance test, and the thermal conductivity of the impact-resistant material-4 was 0.16 W m -1 k -1 , and the thermal diffusivity was 0.10 mm 2 s.​​-1 .

[0046] (6) The infrared emissivity of the impact-resistant material-4 prepared in this embodiment was tested, and the infrared emissivity of the impact-resistant material-4 was 0.92.

[0047] (7) Heat the impact-resistant material-4 prepared in this embodiment with a heating lamp (250 W) for 30 min. Figure 6 As shown, after 30 minutes, the surface temperature of the impact-resistant material-4 increased by 16.3°C. o C. Further linear fitting of the temperature change curve of impact-resistant material-4 within 30 minutes shows that the slope of the fitted straight line for impact-resistant material-4 is 2.52.

[0048] Example 5

[0049] (1) Preparation of impact-resistant material-5: 7.5 g of hydrophobic fumed silica was dispersed in 150 mL of hydroxyl silicone oil, and then 11.5 g of boric acid was added to the mixture. The mixture was then subjected to a reaction at 500 rpm and 120 rpm. o After reacting at C for 3.0 h, the gel was cooled to room temperature to obtain the elastic non-Newtonian gel (ENG). 40 g of ENG was placed in a torque rheometer and subjected to a rotation speed of 120 rpm and a temperature of 80 °C. o Shear dispersion was performed at C for 2.0 min, followed by the addition of 1.6 g of benzoyl peroxide for vulcanization. After 2.0 min, 5.0 g of collagen fiber was added and kneaded. After 2.0 min, the mixture was removed and allowed to stand for 24 h. Then, it was subjected to a process at 50 °C. o The above mixture was hot-pressed for 10 min under C and 5.0 MPa conditions to obtain impact-resistant material-5.

[0050] (2) Frequency scanning tests were performed on the impact-resistant material-5 prepared in this embodiment using a rotational rheometer (TA-AR2000ex, USA). For example... Figure 1 As shown, in the frequency range of 0.1-100 Hz, the storage modulus of the impact-resistant material-5 shows a significant upward trend, increasing from 8439 Pa to 0.32 MPa, exhibiting shear hardening characteristics.

[0051] (3) Impact resistance performance test of the impact-resistant material-5 prepared in this embodiment: The impact-resistant material-5 was placed on the impact table of the CLC-AI drop hammer impact testing machine (Beijing Guance Precision Instrument Equipment Co., Ltd.) and fixed. Drop hammer impact tests were conducted using a hammer head (Φ20 mm, 2.36 kg) at heights of 25 mm, 50 mm, 75 mm, 100 mm, 125 mm and 150 mm. Figure 2 a, Figure 2The peak forces were 105 N, 138 N, 154 N, 200 N, 250 N and 297 N, and the cushioning times were 3.415 ms, 3.265 ms, 3.489 ms, 3.397 ms, 3.221 ms and 3.104 ms, respectively.

[0052] (4) The back of the impact-resistant material-5 in Example (3) after being impacted at a drop hammer height of 150 mm was taken by a stereomicroscope (Fig. 6c). Figure 2 c}.

[0053] Example 6

[0054] (1) Preparation of the impact-resistant thermal management material: 1.5 g of collagen fibers were added to 30 mL of an ethanol-water (1:1 v / v) mixed solution, and then 3.9 g of tetraethyl orthosilicate was added. The reaction was carried out at 25 °C for 4.0 h, followed by dropwise addition of ammonia water to adjust the pH to 9.0, and the reaction was continued at 35 °C for 4.0 h. After the reaction was completed, the nano-silica modified collagen fibers were obtained after drying. 0.3 g of sodium alginate was added to 30 mL of deionized water, and stirred at 30 °C for 0.5 h, followed by adding 1.5 g of nano-silica modified collagen fibers to the above sodium alginate aqueous solution and stirring for 2.0 h. The above mixture was freeze-dried to prepare a collagen fiber-based porous aerogel. The impact-resistant material-4 prepared in Example 4 was used as the core material, and the collagen fiber-based porous aerogel was used as the shell layer. The impact-resistant thermal management material was prepared by hot pressing at 50 °C and 5.0 MPa for 10 min. o o C for 4.0 h. After the reaction was completed, the nano-silica modified collagen fibers were obtained after drying. 0.3 g of sodium alginate was added to 30 mL of deionized water, and stirred at 30 °C for 0.5 h, followed by adding 1.5 g of nano-silica modified collagen fibers to the above sodium alginate aqueous solution and stirring for 2.0 h. The above mixture was freeze-dried to prepare a collagen fiber-based porous aerogel. The impact-resistant material-4 prepared in Example 4 was used as the core material, and the collagen fiber-based porous aerogel was used as the shell layer. The impact-resistant thermal management material was prepared by hot pressing at 50 °C and 5.0 MPa for 10 min. o

[0055] (2) The collagen fiber-based porous aerogel prepared in this example was placed above the glass for impact protection experiment. As shown in Fig. 6b, the peak force after impact was 118.28 N, the cushioning time was 2.32 ms, and the glass was broken after impact. Figure 5

[0056] (3) The infrared emissivity of the collagen fiber-based porous aerogel prepared in this example was tested, and the infrared emissivity of the collagen fiber-based porous aerogel was 0.84.

[0057] (4) The impact-resistant thermal management material prepared in this example was tested for impact resistance: The impact-resistant thermal management material was placed on the impact platform of the drop hammer impact testing machine CLC-AI (Beijing Guancheng Jingdian Instrument and Equipment Co., Ltd.), and a hammer head (Φ20 mm, 2.36 kg) was used to drop at a height of 50 mm, 75 mm, 100 mm, 125 mm and 150 mm for drop hammer impact test. As shown in Fig. 6a, Figure 3 a、 Figure 3 ​​​As shown in FIG. b, the peak forces are 156 N, 223 N, 236 N, 269 N and 361 N, respectively, and the cushioning times are 2.779 ms, 2.730 ms, 2.633 ms, 2.652 ms and 2.707 ms, respectively.

[0058] (5) The back surface of the impact-resistant thermal management material in Example (2) after being subjected to impact was photographed by a stereomicroscope. Figure 3 c).

[0059] (6) The impact-resistant thermal management material prepared in this example was placed above the glass for impact-resistant protection experiment. As shown in FIG. Figure 5 , the peak force after being subjected to impact was 63.78 N, and the cushioning time was 3.99 ms, and the glass was intact after impact.

[0060] (7) The thermal performance of the impact-resistant thermal management material prepared in this example was tested, and the thermal conductivity of the impact-resistant thermal management material was 0.12 W m -1 k -1 , and the thermal diffusivity was 0.09 mm 2 s -1 .

[0061] (8) The infrared emissivity of the impact-resistant thermal management material prepared in this example was tested, and the infrared emissivity of the impact-resistant thermal management material was 0.78.

[0062] (9) The impact-resistant thermal management material prepared in this example was heated by a heating lamp (250 W) for 30 min. As shown in FIG. Figure 6 , after 30 min, the surface temperature of the impact-resistant thermal management material increased by 12.3 o C. Further linear fitting the temperature change curve of the impact-resistant thermal management material within 30 min, the slope of the fitted straight line of the impact-resistant thermal management material was 1.45.

[0063] Comparative Example 1

[0064] (1) Preparation of the control sample: 7.5 g of hydrophobic fumed silica was dispersed into 150 mL of hydroxyl silicone oil, then 11.5 g of boric acid was added to the above mixture, and after reaction at 500 rpm, 120 o C for 3.0 h, it was cooled to room temperature to obtain an elastic non-Newtonian gel (ENG). 40 g of ENG was placed in a torque rheometer and sheared and dispersed at a speed of 120 rpm and a temperature of 80 o C for 2.0 min, then 1.6 g of benzoyl peroxide was added for vulcanization, and after 4.0 min, the mixture was taken out and left to stand for 24 h at 50 oThe control sample was prepared by hot-pressing the mixture described above at 5.0 MPa for 10 min.

[0065] (2) The control sample prepared in this example was subjected to frequency sweep test using a rotational rheometer (TA-AR2000ex, USA). As shown in FIG. 2, the storage modulus of the control sample showed a significant upward trend from 22.62 Pa to 0.034 MPa in the frequency range of 0.1-100 Hz, exhibiting shear hardening characteristics. Figure 1

[0066] (3) The control sample prepared in this example was subjected to impact resistance test: the control sample was placed on the impact platform of a falling weight impact tester CLC-AI (Beijing Guanmei Jingdian Instrument and Equipment Co., Ltd.) and fixed, and a hammer head (Φ20 mm, 2.36 kg) was used to perform falling weight impact test at a height of 50 mm, 75 mm, 100 mm, 125 mm and 150 mm. As shown in FIG. 3a and FIG. 3b, the peak force was 154 N, 265 N, 406 N, 527 N and 629 N, respectively, and the buffer time was 3.406 ms, 3.139 ms, 3.037 ms, 2.813 ms and 2.721 ms, respectively. When no test sample was placed on the impact platform, the peak force was 571 N, 743 N, 875 N, 1076 N and 1203 N, respectively, and the buffer time was 1.142 ms, 1.608 ms, 2.057 ms, 1.874 ms and 1.918 ms, respectively. Figure 4 a、 Figure 4 b

[0067] Comparative Example 2

[0068] The steel plate was placed above the glass to perform impact resistance protection experiment. As shown in FIG. 4a and FIG. 4b, the peak force after impact was 258.54 N, and the buffer time was 1.06 ms, and the glass was broken after impact. When no buffer material was placed on the glass, the peak force after impact was 256.07 N, and the buffer time was 0.69 ms, and the glass was severely broken after impact. Figure 5

[0069] Comparative Example 3

[0070] The commercial melamine foam was placed above the glass to perform impact resistance protection experiment. As shown in FIG. 5a and FIG. 5b, the peak force after impact was 231.29 N, and the buffer time was 1.86 ms, and the glass was broken after impact. Figure 5

[0071] ​​​The above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An impact-resistant thermal management material, characterized in that, This material is a sandwich structure material made of impact-resistant material as core material and collagen fiber-based porous aerogel as shell layer; The impact-resistant material is a collagen fiber-reinforced non-Newtonian gel prepared by a compounding process of collagen fibers and non-Newtonian gel. The non-Newtonian gel was prepared from hydroxyl silicone oil, hydrophobic fumed silica and boric acid. The mixing process uses benzoyl peroxide as a vulcanizing agent. The collagen fiber-based porous aerogel was prepared by reacting nano-silica-modified collagen fibers with sodium alginate solution and then freeze-drying.

2. The impact-resistant thermal management material as described in claim 1, characterized in that, The mass ratio of collagen fibers to non-Newtonian gel is 1:(8-40).

3. The impact-resistant thermal management material as described in claim 1, characterized in that, The nano-silica modified collagen fibers are prepared by in-situ hydrolysis of tetraethyl orthosilicate on the surface of collagen fibers.

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