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Method of preparation of stubborn boundary bonding type bamboo fiber/poly lactic acid biodegradable material

A degradable material and combined technology, which is applied in the field of environmental protection material preparation, can solve the problems of poor mechanical properties of composite materials, poor interface bonding, and difficulty in meeting practical application requirements, and achieves low cost, excellent mechanical properties, and easy operation in the preparation process. Effect

Inactive Publication Date: 2017-08-11
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is to provide a composite degradable material that is difficult to meet the requirements of practical applications due to the poor interface bonding between the filler and the resin matrix, resulting in poor mechanical properties of the composite material that is currently common. Alkali-soaked bamboo strips, liquid nitrogen freezing and grinding to obtain bamboo fiber bundles, obtaining mycelial suspension from moldy fermented bean curd, fermenting and modifying bamboo fiber bundles and peach gum under the action of mycelial suspension, and finally compounding with polylactic acid Methods for degradable materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Weigh 800g of bamboo strips, cut them into 3cm-long sections with a chopping knife, immerse the obtained bamboo strips in 8L of 10% sodium hydroxide solution for 1 hour with shaking, take out the bamboo strips after the dipping, and immediately Spray and freeze with liquid nitrogen for 3 minutes, then put the frozen bamboo strips into a mortar and grind for 10 minutes, collect bamboo fiber bundles, and set aside; take 200g fermented bean curd and put it in a stainless steel tray, put the tray at a temperature of 30°C, The relative air humidity is 60% in a greenhouse where the mold is left to stand for 10 days. When the length of the mycelia on the surface of the fermented bean curd reaches 3mm, the mycelium on the surface of the bean curd is rinsed with 2L of sterile water, and the eluate is collected to obtain the mycelium suspension. Standby; weigh 200g of peach gum and pour it into a beaker filled with 1L of water, move the beaker into an oil bath, heat up to 90°C, an...

example 2

[0021]Weigh 850g of bamboo strips, cut them into 4cm-long sections with a chopping knife, immerse the resulting bamboo strips in 9L of 10% sodium hydroxide solution for 2 hours with shaking, take out the bamboo strips after the dipping, and immediately Spray and freeze with liquid nitrogen for 4 minutes, then put the frozen bamboo strips into a mortar and grind for 13 minutes, collect the bamboo fiber bundles, and set aside; take 250g fermented bean curd and put it in a stainless steel tray, put the tray at a temperature of 35°C, The relative air humidity is 65% in a greenhouse where the mold is left to stand for 11 days. When the length of mycelia on the surface of the fermented bean curd reaches 4mm, the mycelium on the surface of the bean curd is rinsed with 2L of sterile water, and the eluate is collected to obtain a suspension of mycelia. Standby; weigh 250g of peach gum and pour it into a beaker filled with 2L of water, move the beaker into an oil bath, heat up to 95°C, a...

example 3

[0024] Weigh 900g of bamboo strips, cut them into 5cm-long sections with a chopper, immerse the obtained bamboo strips in 10L of 10% sodium hydroxide solution for 3 hours with shaking, take out the bamboo strips after the immersion, and immediately Spray and freeze with liquid nitrogen for 5 minutes, then put the frozen bamboo strips into a mortar and grind for 15 minutes, collect bamboo fiber bundles, and set aside; take 300g fermented bean curd and put it in a stainless steel tray, put the tray at 40°C, The relative air humidity is 70% in a greenhouse where the mold is left to stand for 12 days. When the length of mycelium on the surface of fermented bean curd reaches 5mm, the mycelium on the surface of fermented bean curd is rinsed with 3L of sterile water, and the eluate is collected to obtain a mycelium suspension. Standby; weigh 300g of peach gum and pour it into a beaker filled with 2L of water, move the beaker into an oil bath, heat up to 100°C, stir with a glass rod un...

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Abstract

The invention relates to a method of preparation of stubborn boundary bonding type bamboo fiber / poly lactic acid biodegradable material, belongs to the field of environmental protection materials. By the method, bamboo skin is firstly leached by alkali, portion of fibrin and pectin are dissolved, the surface polarity of bamboo skin is fallen, polyhydroxy property is provided by the reutilization of bamboo fiber beam, then mingled with natural resin peach gum, by the addition of bean curd microorganism, on the one hand minute rot treatment is conducted on the surface of the fiber beam by the utilization of microorganism, microcellular structure is formed on the surface of the fiber beam, the specific surface area is enlarged, the boundary bonding strength of fiber beam and poly lactic acid is reinforced, on the other hand in the presence of microorganisms, reaction is taken place between peach gum and surface hydroxyl group of fiber beam, resin grain is grafted on the surface of fiber beam, and the boundary bonding force of fiber beam and poly lactic acid is further enhanced, the physical property and the chemical property of fiber beam are transformed, the compatibility between the padding and resin matrix is improved, the bonding is more solid, the mechanical property of biodegradable materials is greatly boosted, and broad application prospect is provided.

Description

technical field [0001] The invention relates to a preparation method of a strong interface bonded bamboo fiber / polylactic acid degradable material, which belongs to the field of preparation of environment-friendly materials. Background technique [0002] Lack of resources, energy crisis and environmental deterioration make people gradually realize that the effective use of resources and environmental protection are of great significance to the realization of social and economic sustainable development. Composite materials occupy a place in the field of material science due to their advantages of energy saving and high strength. However, many composite materials have caused increasingly serious environmental problems due to recycling and regeneration. Therefore, solving the regeneration and recycling of composite materials and making them develop in the direction of environmental coordination are currently hot research areas for scholars studying composite materials at home a...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08L93/00C08L71/02C08K5/12C08J5/18
CPCC08L67/04C08J5/18C08J2367/04C08J2497/02C08L2201/06C08L2203/16C08L2205/035C08L97/02C08L93/00C08L71/02C08K5/12
Inventor 郭迎庆林晨
Owner CHANGZHOU UNIV