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Adjusting method of natural vegetable fiber and polylactic acid interface

A technology of natural plant fiber and interface regulation, applied in the field of interface regulation between natural plant fibers and polylactic acid, can solve the problems of inhomogeneous anisotropic materials, complex interface characteristics, affecting the comprehensive performance of composite materials, etc. Effect

Active Publication Date: 2013-03-20
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, natural plant fiber is composed of cellulose, hemicellulose, lignin and various extracts. It is an inhomogeneous anisotropic material with complex interfacial properties.
Its main components, cellulose, hemicellulose, and lignin, contain a large number of polar hydroxyl and phenolic hydroxyl functional groups, making its surface exhibit strong chemical polarity, resulting in the interface between plant fibers, polylactic acid, and other biodegradable plastic substrates. Poor compatibility, microscopically inhomogeneous system, two phases have a very clear interface, poor cohesion, so that the stress cannot be effectively transmitted at the interface, the physical and mechanical properties of the prepared biodegradable composite material are significantly reduced, thus affecting Comprehensive properties of composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Pour 500ml of hexamethyldisiloxane into a round bottom flask with a volume of 1500ml, and connect the mouth of the flask to the reaction chamber of the low temperature plasma processor with a high temperature resistant hose with a valve and a flow meter ( closed before processing).

[0017] 2. Place the round bottom flask filled with hexamethyldisiloxane on the water bath, and set the temperature of the water bath at 100°C.

[0018] 3. Weigh a certain amount of natural plant fiber and put it into the stage in the reaction chamber of the low-temperature plasma processing apparatus.

[0019] 4. Turn on the vacuum pump of the low-temperature plasma processor to pump out the air in the reaction chamber, open the valve on the high-temperature resistant hose while pumping air, fill the gaseous hexamethyldisiloxane into the reaction chamber, and adjust the flow meter to control the reaction. The gaseous hexamethyldisiloxane flow rate in the chamber will reach a dynamic equ...

Embodiment 2

[0023] 1. Pour 500ml of hexamethyldisiloxane into a round bottom flask with a volume of 1500ml, and connect the mouth of the flask to the reaction chamber of the low temperature plasma processor with a high temperature resistant hose with a valve and a flow meter ( closed before processing).

[0024] 2. Place the round bottom flask filled with hexamethyldisiloxane on the water bath, and set the temperature of the water bath at 100°C.

[0025] 3. Weigh a certain amount of natural plant fiber and put it into the stage in the reaction chamber of the low-temperature plasma processing apparatus.

[0026] 4. Turn on the vacuum pump of the low-temperature plasma processor to pump out the air in the reaction chamber, open the valve on the high-temperature resistant hose while pumping air, fill the gaseous hexamethyldisiloxane into the reaction chamber, and adjust the flow meter to control the reaction. The gaseous hexamethyldisiloxane flow rate in the chamber will reach a dynamic equ...

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Abstract

The invention relates to an adjusting method of natural vegetable fiber and polylactic acid interface. The invention is characterized in that thermal volatilization gas of hexamethyl disiloxane is taken as a gas medium, natural vegetable fiber is treated under normal pressure by a low temperature plasma processor, an ultrathin silicon-oxygen-carbon compound nonpolar layer is deposited on the surface of the natural vegetable fiber, so that the surface performance of the natural vegetable fiber can be modified for achieving the purpose of adjusting the compatibility of the natural vegetable fiber and polylactic acid interface. The invention solves the defects of intelligible interface and poor adhesive stress existed in the composition phase, stress can be effectively conveyed in interfacial energy, so that the compatibility of the natural vegetable fiber and polylactic acid can be improved, thereby the comprehensive properties of the composite material can be raised.

Description

technical field [0001] The invention relates to a method for regulating the interface of composite materials, belonging to the field of composite material manufacturing, in particular to a method for regulating the interface between natural plant fibers and polylactic acid. Background technique [0002] Natural plant fibers such as wood fiber, bamboo fiber and hemp fiber have the advantages of large aspect ratio, high specific strength, large specific surface area, low density, low price, renewability and biodegradability. Composite preparation of high-quality raw materials for biodegradable composite materials. However, natural plant fiber is composed of cellulose, hemicellulose, lignin and various extracts. It is an inhomogeneous anisotropic material with complex interfacial properties. Its main components, cellulose, hemicellulose, and lignin, contain a large number of polar hydroxyl and phenolic hydroxyl functional groups, making its surface exhibit strong chemical pola...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/28C08J5/06C08L67/04C08L97/02
Inventor 吴义强李新功郑霞李辉凌启飞陈卫民
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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