Preparation method of graft copolymer of nano cellulose and aliphatic polyester

A technology of nano-cellulose and aliphatic polyester, which is applied in the field of polymer materials, can solve the problems of poor compatibility of blending systems, and achieve the effects of good compatibility, plasticity and processability, and alkali and water resistance

Active Publication Date: 2010-06-16
JILIN COFCO BIOCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the research has achieved certain results, the problem of poor compatibility of the two components in the blend system has not been fundamentally resolved, and the performance of the blend material needs to be further improved

Method used

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  • Preparation method of graft copolymer of nano cellulose and aliphatic polyester
  • Preparation method of graft copolymer of nano cellulose and aliphatic polyester
  • Preparation method of graft copolymer of nano cellulose and aliphatic polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of nanocellulose. Disperse 10 grams of cellulose in 100 grams of 65% sulfuric acid aqueous solution, and stir and acidify at room temperature for 48 hours. Then centrifuge to collect the solid, wash the solid with distilled water until neutral, and freeze-dry to obtain nanocellulose. The size distribution of nanocellulose is 80-200nm.

Embodiment 2

[0025] In embodiment 1, replace sulfuric acid aqueous solution with hydrochloric acid aqueous solution, test procedure and method are identical with embodiment 1. The obtained nanocellulose has a size distribution of 80-200 nm.

Embodiment 3

[0027] In embodiment 1, room temperature is changed into 60 ℃, and test procedure and method are identical with embodiment 1.

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Abstract

The invention relates to a preparation method of a graft copolymer of nano cellulose and aliphatic polyester. The preparation method comprises the following steps of: adding cellulose as a raw material into a certain concentration of acidic solution, acidulating for a certain time under heating and stirring conditions, then centrifugally separating, collecting solids, washing with distilled water till neutralizing, freezing and drying to prepare the nano cellulose; then initiating the ring-opening polymerization of Epsilon-caprolactone and lactide monomer by taking hydroxyls in nano cellulose molecules as an initial active point and stannous octoate as an initiating agent under water-free and oxygen-free conditions to obtain the grate copolymer of the nano cellulose and the aliphatic polyester, wherein the grate copolymer is completely biodegradable. The nano cellulose grafted aliphatic polyester material is even to disperse in a substrate of a polyester material, and has excellent plasticity and machinability, acid resistance, alkali resistance and waterproofness.

Description

Technical field: [0001] The invention provides a preparation method of nano-cellulose and aliphatic polyester graft copolymer, which belongs to the technical field of fully biodegradable polymer materials. technical background: [0002] Aliphatic polyesters, such as polylactide (PLA), polyε-caprolactone (PCL), and polyglycolide (PGA), are currently a class of fully biodegradable materials that are widely used. Aliphatic polyester has low immunity and good biodegradability, biocompatibility and mechanical strength, so it is widely used in biomedical and medical fields, such as: fracture fixation materials, surgical sutures, tissue engineering scaffold materials, drugs Sustained-release carrier materials, etc. But at present, it is expensive and has not been widely used for the time being. [0003] The development and application of natural polymers and degradable synthetic polymer materials will help to solve the environmental crisis and resource crisis faced by human being...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B15/00C08G63/688C08G63/08C08L67/00C08L1/08
Inventor 佟毅陈莉白岚刘勇范春艳
Owner JILIN COFCO BIOCHEM
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