Modifying method of nonthermoplastic cellulose derivative material

A cellulose derivative, non-thermoplastic technology, applied in the field of cellulose material processing and modification, can solve the problems of complex solvent recovery process, high production cost, environmental pollution, etc. The effect of high reaction efficiency

Active Publication Date: 2008-12-17
SICHUAN UNIV
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cellulose derivatives obtained by the chemical reaction method, except for several thermoplastic cellulose derivatives such as cellulose acetate, can be directly melt-processed and modified, and the modification of other cellulose derivatives needs to be carried out in organic solvents or water at present. The solvent recovery process used for modification is complicated and pollutes the environment, and the production cost is high and the efficiency is low, which limits the expanded application of non-thermoplastic cellulose derivative materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 60 g of hydroxyethyl cellulose, 60 g of N,N-dimethylformamide, and 5 g of maleic anhydride were stirred uniformly and reacted in an open mill at 90° C. for 5 minutes. The product was extracted with acetone for 48 hours, and the carbonyl peak can be clearly seen by the infrared test. The system without maleic anhydride has no carbonyl absorption peak, indicating that the esterification reaction between maleic anhydride and hydroxyethyl cellulose is successful. After testing, the esterification rate is 5.56%, the crystallinity decreases from 23% to 9%, and the maximum decomposition temperature increases from 269°C to 293°C.

Embodiment 2

[0024] 60 g of hydroxyethyl cellulose, 60 g of N, N-dimethylformamide, and 10 g of maleic anhydride were stirred uniformly and reacted in an open mill at 90° C. for 5 minutes. After extraction with acetone for 48 hours, it was dried to constant weight. After testing, the esterification rate is 9.76%, and the maximum decomposition temperature increases from 269°C to 301°C. Crystallinity can be reduced by 16%.

Embodiment 3

[0026] 60 g of hydroxyethyl cellulose, 60 g of N,N-dimethylformamide, and 5 g of maleic anhydride were stirred uniformly and reacted in an open mill at 80° C. for 5 minutes. The esterification rate is about 5%, and the maximum decomposition temperature increases from 269°C to 300°C.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
boiling pointaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for modifying nonthermoplastic cellulose derivative material, including the main content that 40 wt-80wt percent of matrices of nonthermoplastic cellulose derivative material, 1wt-50wt percent of a reaction monomer and 10 wt-59 wt percent of a plasticizer are evenly mixed and then arranged into a processing and mixing device. The mixing reaction is carried out for 1 minute to 20 minutes at 60 DEG C to 140 DEG C on the condition of the operation of the mixing device. The substance discharged is the nonthermoplastic cellulose derivative material with the modified performance. The method for modifying the nonthermoplastic cellulose derivative material, provided in the invention, does not require completing in a solvent with the addition of an initiating agent, thereby fully avoiding side reactions caused by the initiating agent remaining in the material when the modifying method of the prior art is adopted, such as degradation, oxidation, etc., as well as the environmental pollution caused by the use of the solvent. The method of the invention has simple realization technology and high reaction efficiency, and can obviously improve the heat resistance and processing performance of the nonthermoplastic cellulose derivative material.

Description

technical field [0001] The invention relates to a technology for processing and modifying cellulose materials, more specifically, to a method for processing and modifying non-thermoplastic cellulose derivative materials. Background technique [0002] Cellulose is a natural and fully degradable polymer material, which has the advantages of environmental friendliness, renewable, large quantity and low price. In recent years, with the increasing shortage of petroleum and coal resources, synthetic polymer materials such as plastics are difficult to degrade, and the environmental pollution is becoming more and more serious. The development and research of biodegradable materials, especially the development and research of cellulose-based materials, have received more and more attention. It is particularly important to functionally modify cellulose materials to expand their application range. At present, the modification methods of cellulose and its derivative materials mainly in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08B13/00C08B15/00
Inventor 郭少云陈蓉吴宏易传斌
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap