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Method for enhancing tear resistance of polymer membrane material by using planar silkworm cocoon and composite membrane material thereof

A polymer film and tear-resistant technology, applied in the field of fiber reinforced composite materials, can solve the problems of pure polymer film being unable to effectively disperse stress concentration, notch sensitive fracture failure of pure polymer film, shortening the service life of materials, etc. Ease of shape and size control, improved tear resistance, long life effect

Active Publication Date: 2021-06-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual use, the notch sensitivity of pure polymer membranes makes it easy for the overall fracture failure to occur due to the appearance of small cracks
When the force is applied, the pure polymer film cannot effectively disperse the stress concentration generated at the gap, resulting in the rapid expansion of the gap, which significantly weakens its mechanical properties and greatly shortens the service life of the material.

Method used

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  • Method for enhancing tear resistance of polymer membrane material by using planar silkworm cocoon and composite membrane material thereof
  • Method for enhancing tear resistance of polymer membrane material by using planar silkworm cocoon and composite membrane material thereof
  • Method for enhancing tear resistance of polymer membrane material by using planar silkworm cocoon and composite membrane material thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of flat silkworm cocoons: 3 cooked silkworms are placed on a circular flat plate with a diameter of 20 cm to spin silk, so that the ratio of the number of cooked silkworms to the area of ​​the flat plate is about 1 (head): 105 (cm 2 ). Finally, a circular planar cocoon with a diameter of 20 cm is obtained, and its fiber network structure is as follows: figure 1 shown.

[0032] (2) Mixed polymer solution: cut the planar cocoon obtained in step (1) into a size with a length*width of 3.5cm*3.5cm, and place it in a groove with a depth of 0.9mm (length*width*depth is 3.5cm *3.5cm*0.9mm), then pour epoxy resin (Epoxy resin, 3016LV, Shenzhen Huasheng Tongchuang Technology Co., Ltd.) into the groove and completely immerse the plane cocoon;

[0033] (3) Remove air bubbles: extract the mixed system obtained in step (2) by a vacuum pump for 5 minutes;

[0034] (4) Curing: The mixed system obtained in step (3) was cured in a constant temperature oven at a curing ...

Embodiment 2

[0038] (1) Preparation of flat silkworm cocoons: 3 cooked silkworms are placed on a circular flat plate with a diameter of 20 cm to spin silk, so that the ratio of the number of cooked silkworms to the area of ​​the flat plate is about 1 (head): 105 (cm 2 ). Finally, a circular plane cocoon with a diameter of 20 cm is obtained.

[0039] (2) Mixed polymer solution: cut the planar cocoon obtained in step (1) into a size with a length*width of 3.5cm*3.5cm, and place it in a groove with a depth of 0.9mm (length*width*depth is 3.5cm *3.5cm*0.9mm), then pour polydimethylsiloxane (PDMS, Sylgard 184, Dow Corning, USA) into the groove and completely immerse the plane cocoons;

[0040] (3) Remove air bubbles: extract the mixed system obtained in step (2) by a vacuum pump for 10 minutes;

[0041] (4) Curing: The mixed system obtained in step (3) was cured in a constant temperature oven, the curing temperature was 60° C., and the curing time was 4 hours.

[0042] (5) Performance charac...

Embodiment 3

[0045](1) Preparation of planar silkworm cocoons: 6 cooked silkworms are placed on a circular plate with a diameter of 20 cm to spin silk, so that the ratio of the number of cooked silkworms to the area of ​​the plate is about 1 (head): 52.5 (cm 2 ). Finally, a circular plane cocoon with a diameter of 20 cm is obtained.

[0046] (2) Mixed polymer solution: cut the planar cocoon obtained in step (1) into a size with a length*width of 3.5cm*3.5cm, and place it in a groove with a depth of 0.9mm (length*width*depth is 3.5cm *3.5cm*0.9mm), then pour epoxy resin (Epoxy resin, 3016LV, Shenzhen Huasheng Tongchuang Technology Co., Ltd.) into the groove and completely immerse the plane cocoon;

[0047] (3) Remove air bubbles: extract the mixed system obtained in step (2) by a vacuum pump for 5 minutes;

[0048] (4) Curing: The mixed system obtained in step (3) was cured in a constant temperature oven at a curing temperature of 55° C. and a curing time of 12 hours.

[0049] (5) Perfor...

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Abstract

The invention discloses a method for enhancing the tear resistance performance of a polymer membrane material by using plane cocoons and a composite membrane material thereof. Place the cooked silkworm on a flat plate to spin silk to obtain a flat cocoon, and place the flat cocoon in the groove; then pour the polymer solution into the groove and completely immerse the flat cocoon, and then remove the air bubbles; finally, put the above mixed system at a certain temperature Under the curing, the fiber-reinforced composite membrane is finally obtained. The method of the invention is simple to operate, and the mechanical property of the polymer membrane material is significantly improved by using the cocoon fiber directly spun by the silkworm on the flat plate, and a high-performance fiber-reinforced composite membrane is obtained.

Description

technical field [0001] The invention relates to a method for enhancing the performance of a polymer membrane material in the field of fiber-reinforced composite materials, in particular to a method for enhancing the tear resistance of a polymer membrane material by using plane cocoons. Background technique [0002] Polymer membrane materials have important applications in chemical, mechanical, medical and electronic sensing fields. In actual use, the notch sensitivity of pure polymer membranes makes it easy for the overall fracture failure to occur due to the appearance of small cracks. When the force is applied, the pure polymer film cannot effectively disperse the stress concentration generated at the gap, resulting in the rapid expansion of the gap, which significantly weakens its mechanical properties and greatly shortens the service life of the material. Therefore, it is of great significance to enhance the mechanical properties of polymer membranes and prolong their s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L83/04C08L75/04C08L29/04C08L89/00C08J5/18
CPCC08J5/18C08J2329/04C08J2363/00C08J2375/04C08J2383/04C08J2489/00
Inventor 柏浩许宗溥吴明瑞高微微
Owner ZHEJIANG UNIV
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