Method for preparing peanut shell fiber modified polylactic acid

A technology of fiber modification and peanut shell, which is applied in the field of preparation of peanut shell fiber modified polylactic acid, can solve the problems of wasting resources, destroying the soil structure, and harming the environment, and achieves the goal of improving high-efficiency utilization, wide sources, and reducing environmental pollution Effect

Inactive Publication Date: 2018-05-15
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It not only causes waste of resources but also has serious environmental hazards and damage to soil structure.

Method used

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  • Method for preparing peanut shell fiber modified polylactic acid
  • Method for preparing peanut shell fiber modified polylactic acid
  • Method for preparing peanut shell fiber modified polylactic acid

Examples

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Embodiment

[0030] The embodiment of the present invention is realized through the following technical scheme: the cellulose is extracted from peanut shells by alkali hydrolysis, acid hydrolysis, decolorization, etc. Solvent evaporation method to prepare peanut shell cellulose / polylactic acid composite film. The specific process is as follows:

[0031] Preparation of cellulose from peanut shells: Alkaline hydrolysis of peanut shells with aqueous sodium hydroxide solution, filtration after alkali hydrolysis, acid hydrolysis of filter residue, decolorization with oxidizing agent after acid hydrolysis.

[0032] Preparation of peanut shell cellulose / polylactic acid film: polylactic acid is dissolved in chloroform to form a solution, and the peanut shell cellulose prepared above is added to obtain a casting film stock solution, and the film is formed by salivation.

[0033] The alkali hydrolysis in the preparation of the peanut shell cellulose is to carry out alkali hydrolysis on peanut shell...

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Abstract

The invention discloses a method for preparing peanut shell fiber modified polylactic acid. The method comprises the following steps: by taking peanut shells as a raw material, extracting cellulose through procedures of alkaline hydrolysis, acidolysis, decoloring and the like, putting the obtained cellulose into a polylactic acid/trichloromethane solution, coating, and preparing a peanut shell cellulose/polylactic acid composite membrane by using a solvent volatilization method. Due to adoption of the peanut cellulose as a reinforcing material in the polylactic acid, the mechanical propertiesof pure polylactic acid are improved; when the content of the peanut shell cellulose is 6%, the tensile strength is improved by 52.1%, and the breakage elongation rate is increased by 30.8%. The peanut shell fiber modified polylactic acid made of the peanut shells for a first time is wide in raw material source, low in price, gentle in reaction condition, simple in process, green and environmental-friendly and free of pollution in the process, and the method is a green and environmental-friendly process for modifying polylactic acid from recyclable resources.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer compound composite materials, and in particular relates to a preparation method of peanut shell fiber modified polylactic acid. Background technique [0002] Polylactic acid is a new type of biodegradable polymer material. Because its raw materials are mainly derived from non-petroleum-based plant resources, it can be completely biodegraded. As an excellent degradable material, polylactic acid is particularly important to increase its development and application to solve the current white pollution. It is currently widely used in packaging, medicine, construction and textiles and other fields. However, due to the large number of hydrogen bonds between polylactic acid molecules, the molded products have large shrinkage rate, poor dimensional stability, brittle and brittle quality, poor processing thermal stability, and poor product durability, which limit its application as enginee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L1/02C08J5/18
CPCC08J5/18C08J2367/04C08J2401/02
Inventor 宫贵贞张烽
Owner XUZHOU UNIV OF TECH
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