Micro-crystalline cellulose modified polyester preparation method

A technology of microcrystalline cellulose and modified polyester, applied in the field of polyester, can solve the problems of lack of polar functional groups, difficult water diffusion, poor hygroscopicity, etc. Compatibility effect

Active Publication Date: 2017-03-22
ZHEJIANG HENGYI HIGH TECH MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the polyester structure endows it with excellent properties, it also has disadvantages: the molecular chains are tightly arranged and lack polar functional groups, resulting in poor hygroscopicity and difficult diffusion of water in polyester
However, there is no explanation on how to avoid hydrolysis of cellulose crystallites at high temperature and how to protect the hydroxyl groups on the surface of cellulose crystallites during high temperature polymerization.

Method used

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  • Micro-crystalline cellulose modified polyester preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation and surface modification of cellulose microcrystals:

[0036] Add microcrystalline cellulose to sulfuric acid with a concentration of 10mol / L and mixed acid with phthalic acid to fully decompose microcrystalline cellulose. The molar ratio of sulfuric acid to phthalic acid is 1:0.1; The decomposition reaction was continuously stirred at 100° C. for 10 h, washed with deionized water to obtain a dispersion of cellulose microcrystals, and the dispersion was freeze-dried to obtain surface phthalic acid-modified cellulose microcrystals with a particle size of 100 nm.

[0037] (2) Cellulose microcrystalline / glycol beating:

[0038] The mass fraction ratio of the surface-modified cellulose crystallites in ethylene glycol prepared in step (1) is 20% and beaten, and phthalic anhydride is added at the same time, and the added phthalic anhydride is surface-modified cellulose 5% of the microcrystalline mass, forming a uniform cellulose microcrystalline slurry.

[0...

Embodiment 2

[0043] (1) Preparation and surface modification of cellulose microcrystals:

[0044] Add microcrystalline cellulose to the mixed acid of hydrochloric acid and phthalic acid with a concentration of 5mol / L to fully decompose the microcrystalline cellulose. The molar ratio of hydrochloric acid and phthalic acid in the mixed acid is 1:0.5; Under the condition of constant bath temperature: the constant temperature of the oil bath is controlled at 110°C, the decomposition reaction is continuously stirred for 8 hours, and the cellulose microcrystalline dispersion is obtained by washing with deionized water, and the dispersion is freeze-dried to obtain the surface adjacent Phthalate-modified cellulose microcrystals.

[0045] (2) Cellulose microcrystalline / glycol beating:

[0046] The surface-modified cellulose microcrystals are beaten in propylene glycol, and the surface-modified cellulose microcrystals account for 40% of the mass in propylene glycol; at the same time, phthalic anhyd...

Embodiment 3

[0051] (1) Preparation and surface modification of cellulose microcrystals:

[0052] Add microcrystalline cellulose to the mixed acid of nitric acid and phthalic acid with a concentration of 1mol / L to fully decompose the microcrystalline cellulose. The molar ratio of nitric acid and phthalic acid in the mixed acid is 1:1. Continue to stir and decompose for 5 hours at a constant temperature of 120°C, wash with deionized water to obtain cellulose microcrystals, freeze-dry the dispersion, and obtain surface phthalic acid with a particle size of 200 nm for the cellulose microcrystals. Modified cellulose microcrystals.

[0053] (2) Cellulose microcrystalline / glycol beating:

[0054] Surface-modified cellulose microcrystals are beaten in butanediol, and the mass fraction of cellulose microcrystals in butanediol is 60%; at the same time, phthalic anhydride is added, and the added phthalic anhydride is surface modification 3% of the mass of cellulose crystallites forms a uniform cel...

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Abstract

The invention belongs to the technical field of polyester. In order to solve the hydrophile problem of polyester, the present invention provides a micro-crystalline cellulose modified polyester preparation method. The method comprises in sequential order the steps of preparing the micro-crystalline cellulose and conducting the surface decoration, beating the micro-crystalline cellulose into pulp, and conducting the in-situ addition of the micro-crystalline cellulose. The prepared polyester had a good hydrophile property. Polyhydroxy active site can enable the fiber to be dyed under mild conditions and have an excellent dying property. The polymer can be widely used for preparing fiber with moisture absorbing, sweat dispelling and anti-static properties, and can be used as a close-fitting fabric and a high color fastness fiber product.

Description

technical field [0001] The invention relates to the technical field of polyester, in particular to a preparation method of microcrystalline cellulose modified polyester, which is a preparation method in which cellulose microcrystalline surface is modified and introduced into polyester in the form of slurry. Background technique [0002] Polyester fiber is currently the most widely used variety of synthetic fibers. The molecular structure of polyester is regularly arranged and the degree of crystallinity is high, which endows polyester fiber with good mechanical properties and wrinkle resistance. While the polyester structure endows it with excellent properties, it also has disadvantages: the molecular chains are tightly arranged, and the lack of polar functional groups leads to poor hygroscopicity, and it is difficult for water to diffuse in polyester. Under the standard environment, the moisture regain of polyester fiber is only 0.4%, while there are a large number of polar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/672C08G63/78C08B15/00
CPCC08B15/00C08G63/672C08G63/78
Inventor 纪国营徐锦龙王朝生吉鹏李建武
Owner ZHEJIANG HENGYI HIGH TECH MATERIAL
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