Monopolymer composite material based on planar silkworm cocoons and preparation method of monopolymer composite material

A composite material and polymer technology, applied in the field of composite materials, can solve the problems of difficult separation of fibers and polymers, incompatibility of the fiber-matrix interface, and degradation of composite material properties, and achieve excellent mechanical properties, good mechanical properties and acceptable performance. Biodegradable, easy to handle effect

Active Publication Date: 2022-05-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the difference in properties between the reinforcement phase material and the matrix material, the problems of this type of composite material are: 1) the fiber-matrix interface is incompatible, which easily leads to a decrease in the performance of the composite material; 2) it is difficult to separate the fiber and the polymer after use Difficult to recycle and easy to cause environmental pollution

Method used

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  • Monopolymer composite material based on planar silkworm cocoons and preparation method of monopolymer composite material
  • Monopolymer composite material based on planar silkworm cocoons and preparation method of monopolymer composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Place cooked silkworms on a flat plate and spin silk to obtain a planar cocoon with a thickness of 1mm. The SEM photos of its surface morphology are as follows: figure 1 shown;

[0029] (2) Degumming the obtained planar cocoons in 0.5% (mass volume fraction) anhydrous sodium carbonate aqueous solution for 30 minutes, fully dissolved in 9.3M lithium bromide aqueous solution after drying, and then dialyzed in deionized water for 3 days , and then place the aqueous solution of silk protein obtained by dialysis in a -20°C refrigerator to freeze completely, and then use a freeze dryer to dry it in a low-temperature vacuum to finally obtain a solid silk protein;

[0030] (3) dissolving the silk protein solid obtained in step (2) with hexafluoroisopropanol to obtain a 15% (mass volume fraction) silk solution;

[0031] (4) Pour the silk solution obtained in step (3) into the flat silk cocoons, and make the solution submerge the flat silk cocoons, and then place the composi...

Embodiment 2

[0034] (1) placing the cooked silkworm on a flat plate to spin silk to obtain a planar cocoon with a thickness of 2mm;

[0035] (2) Degumming the obtained planar cocoons in 0.5% (mass volume fraction) anhydrous sodium carbonate aqueous solution for 30 minutes, fully dissolved in 9.3M lithium bromide aqueous solution after drying, and then dialyzed in deionized water for 3 days , and then place the aqueous solution of silk protein obtained by dialysis in a -20°C refrigerator to freeze completely, and then use a freeze dryer to dry it in a low-temperature vacuum to finally obtain a solid silk protein;

[0036] (3) dissolving the silk protein solid obtained in step (2) with hexafluoroisopropanol to obtain a 10% (mass volume fraction) silk solution;

[0037] (4) Pour the silk solution obtained in step (3) into the flat silk cocoons, and make the solution submerge the flat silk cocoons, and then place the composite system at room temperature to dry naturally;

[0038] (5) The mate...

Embodiment 3

[0040] (1) placing the cooked silkworm on a flat plate to spin silk to obtain a planar cocoon with a thickness of 0.5mm;

[0041] (2) Degumming the obtained planar cocoons in 0.5% (mass volume fraction) anhydrous sodium carbonate aqueous solution for 30 minutes, fully dissolved in 9.3M lithium bromide aqueous solution after drying, and then dialyzed in deionized water for 3 days , and then place the aqueous solution of silk protein obtained by dialysis in a -20°C refrigerator to freeze completely, and then use a freeze dryer to dry it in a low-temperature vacuum to finally obtain a solid silk protein;

[0042] (3) dissolving the silk protein solid obtained in step (2) with hexafluoroisopropanol to obtain a 20% (mass volume fraction) silk solution;

[0043] (4) Pour the silk solution obtained in step (3) into the flat silk cocoons, and make the solution submerge the flat silk cocoons, and then place the composite system at room temperature to dry naturally;

[0044] (5) The ma...

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Abstract

The invention discloses a preparation method of a monopolymer composite material based on planar silkworm cocoons and a composite material thereof. Mature silkworms are placed on a flat plate to spin to obtain planar silkworm cocoons, on one hand, the planar silkworm cocoons serve as a reinforcement phase of the composite material, and on the other hand, fibroin obtained by dissolving and regenerating the planar silkworm cocoons serves as a matrix of the composite material. The monopolymer composite material based on the planar silkworm cocoons is finally obtained by infiltrating a silk solution into the planar silkworm cocoons, naturally drying a composite system at normal temperature, curing the composite system in methanol, and naturally drying the cured composite system at normal temperature. The method disclosed by the invention is simple to operate, good interface bonding of the matrix and the reinforced phase in the composite material is realized by using the same natural polymer, the mechanical property of the material is improved, and the material has biodegradability.

Description

technical field [0001] The invention relates to a method for preparing a single-polymer composite material in the field of composite materials, in particular to a method for preparing a single-polymer composite material by using plane cocoons. Background technique [0002] Polymer composites have important applications in aerospace, automobile manufacturing, medical devices and other fields. Traditional polymer composite materials generally use metal fibers, ceramic fibers, glass fibers, etc. as reinforcing phases, and synthetic polymers as matrix to prepare composite materials. However, due to the difference in properties between the reinforcement phase material and the matrix material, the problems of this type of composite material are: 1) the fiber-matrix interface is incompatible, which easily leads to a decrease in the performance of the composite material; 2) it is difficult to separate the fiber and the polymer after use Lead to difficult recycling, easy to cause en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/04C08L89/00D01F4/02
CPCC08J5/045D01F4/02C08J2389/00C08J2489/00
Inventor 许宗溥廖荣杨明英王捷帅亚俊
Owner ZHEJIANG UNIV
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