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Nutgall acylation modified fibre an dits synthetic method

A technology of gallocylation modification and synthesis method, which is applied in the field of gallocylation modified cellulose and its synthesis, can solve the problems of unfavorable stability, large steric hindrance, etc., and achieve the effect of low cost and easy purification

Inactive Publication Date: 2007-05-02
JIANGSU QIANGLIN BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Since this structure determines a large steric hindrance and is combined with an ester bond, it is unfavorable for its stability in acid and alkali media.

Method used

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  • Nutgall acylation modified fibre an dits synthetic method
  • Nutgall acylation modified fibre an dits synthetic method
  • Nutgall acylation modified fibre an dits synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 A gallocylated modified cellulose capable of adsorbing and binding proteins and complexing metal ions,

[0042] The structural formula is:

[0043] Wherein, Cell-OH represents cellulose, which may be wood pulp cellulose in this embodiment, and the mass fraction of α-cellulose in the wood pulp cellulose is greater than 80%, and the degree of polymerization is 700-1000.

Embodiment 2

[0044] Embodiment 2 A kind of synthetic method of galloacylated modified cellulose, comprises the following steps:

[0045] Step 1, disperse the pretreated cellulose powder in a sodium hydroxide solution with a mass concentration of 4% to 8%, add epichlorohydrin and emulsifier Span 80, and stir and react at a temperature of 20 to 60°C 2 ~6h, the ratio of materials is: cellulose powder: epichlorohydrin: sodium hydroxide solution: Span 80 = 1: (5 ~ 8): (35 ~ 45): (0.05 ~ 0.1), wherein the cellulose powder Hespan 80 is measured in mass unit g, and epichlorohydrin and sodium hydroxide aqueous solution are measured in volume unit mL. After the reaction is completed, vacuum filtration is performed to elute epichlorohydrin and its viscous homopolymer to obtain Glycidyl cellulose with about 75% water:

[0046]

[0047] Step 2, stirring and reacting the above-mentioned glycidyl cellulose and hexamethylenediamine aqueous solution with a mass concentration of 1 to 2% at a temperature...

Embodiment 3

[0054] Embodiment 3 A method for synthesizing gallocylated modified cellulose, comprising the following steps:

[0055] Step 1: First, the wood pulp cellulose is crushed into powder, sieved through a 1-2mm sieve plate, purified with alkali, then acidified with acetic acid to remove alkali, washed with water, and dried to obtain cellulose powder, which is then Dispersed in sodium hydroxide solution with a mass concentration of 4% to 8%, the mass concentration of sodium hydroxide solution can be selected as 4.5%, 5%, 5.2%, 5.8%, 6%, 7%, 7.5%, 7.7% , add epichlorohydrin and emulsifier Span 80 (code name: Span 80, i.e. oleic acid herbal tea alcohol), the ratio of materials (ratio with dimension) is: cellulose powder: epichlorohydrin: sodium hydroxide Solution: Span 80 = 1: (5-8): (35-45): (0.05-0.1), for example, 1:5:36:0.05, 1:5:37:0.05, 1:5 :38.5:0.05, 1:5:39.5:0.05, 1:5:40:0.05, 1:5:42:0.05, 1:5:44:0.05, 1:5:43.5:0.05, 1:6:39.5 :0.05, 1:7:39.5:0.05, 1:7.5:39.5:0.05, 1:5:39.5...

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Abstract

The aim of this invention is composing a Smyrna gall acylation modified cellulose which is a new functional polymer material that is not easy to hydrolyze and conjugate protein and complex many metal ion with powerful capability: galloyl-1,6- hexa- di-imino-hydroxypropyl-cellulose. The other aim of this invention is providing its composing method: Cellulose first reacts with epichlorohydrin in alkaline medium, connect propyl lateral chain that has epoxy end group, then react with hexa-diamine, at lateral chain connect bridge chain with flexibility that has NH2 end group; then it and tri-acetyl Smyrna gall acyl chloride reacts by pyridinium catalyzing to connect galloyl; At last remove acetyl group that is on galloyl, obtain objective product. In the composing method of this invention, galloyl is as acid amide pattern to directly connect with lateral chain of cellulose giant molecule, it is not easy to hydrolyze, so the objective product can be used in many situations.

Description

technical field [0001] The present invention relates to a functional polymer material and a synthesis method thereof, in particular to a functional polymer material—gallocyl, which uses cellulose as a molecular skeleton, galloyl as a functional group, and is capable of adsorbing and binding proteins and complexing various metal ions Acylated modified cellulose (galloyl-1,6-hexamethylenediimide-hydroxypropyl-cellulose) and its synthesis method. technical background [0002] In the late 1970s, T.Watanabe et al. published a study on the preparation of cellulose-solidified gallic tannic acid to eliminate protein turbidity in sake. At the end of the 1980s, Gu Tiancheng and others in my country published papers following the method of T.Watanabe et al. Since then, "Plant Polyphenols" edited by Shi Bi has also reviewed the research situation of solidified tannins at home and abroad since the 1970s, and introduced substrates other than cellulose (such as agarose, chitin, and synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/14
Inventor 陈笳鸿汪咏梅吴冬梅吴在嵩
Owner JIANGSU QIANGLIN BIO ENERGY
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