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Preparation method of tannin grafted draping double bonds

A technique of pendant and tannin, which is applied in the field of preparation of tannin grafted pendant double bonds, can solve the problems of difficult separation, large molecular weight, complex products, etc., and achieve simple and easy preparation methods, mild implementation conditions and pure products Effect

Inactive Publication Date: 2020-12-25
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Tannin has a large relative molecular weight and many active functional groups, and it is easy to chemically react with modifiers. However, the modified product is complex and difficult to separate, and its poor solubility limits its wide application in the biomedical field.

Method used

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  • Preparation method of tannin grafted draping double bonds

Examples

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Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: Synthesis of tannin grafted allyl glycidyl ether with a molar ratio of 1:15:

[0013] Weigh a certain amount of 2 g of tannin, place it in a vacuum drying oven, and dry it at 50° C. for 6 hours. Add to the flask, add 2.8g allyl glycidyl ether and 0.14g triphenylphosphine respectively, and react at 95°C for 4h. Naturally cool to room temperature, add 1.5 times the total amount of tannin and allyl glycidyl ether in ethanol to dissolve for 12 hours, then settle for 20 minutes under magnetic stirring with petroleum ether, use a vacuum pump to dry the circulating water type, and let it dry naturally for 12 hours. Dry in a vacuum oven at 35°C for 24 hours.

Embodiment 2

[0014] Embodiment 2: Synthesis of tannin grafted allyl glycidyl ether with a molar ratio of 1:25:

[0015] Weigh a certain amount of 2 g of tannin, place it in a vacuum drying oven, and dry it at 50° C. for 6 hours. Add to the flask, add 4.65g allyl glycidyl ether and 0.14g triphenylphosphine respectively, and react at 95°C for 4h. Naturally cool to room temperature, add 1.5 times the total amount of tannin and allyl glycidyl ether in ethanol to dissolve for 12 hours, then settle for 20 minutes under magnetic stirring with petroleum ether, use a vacuum pump to dry the circulating water type, and let it dry naturally for 12 hours. Dry in a vacuum oven at 35°C for 24 hours.

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Abstract

The invention relates to a preparation method of tannin grafted draping double bonds. According to the preparation method, allyl glycidyl ether (AGE) is initiated to be subjected to ring opening grafting to tannin (TA) under the condition of taking triphenylphosphine as a catalyst, so that the tannin is endowed with hyperbranched draping double bonds with reaction activity, and a graft modification product is pure and is easily to separat. The preparation method disclosed by the invention is simple and feasible, the implementation conditions are mild, and no pollution is generated in the production and use processes.

Description

technical field [0001] The invention belongs to the technical field of ecological environment materials, and relates to a preparation method of tannin grafted pendant double bonds. Background technique [0002] As a natural plant polyphenol, tannin (TA) is rich in natural resources and can be recycled. It is an environmentally friendly natural material. The average functionality of the hydroxyl group in the molecular structure of TA is 15, and similar to the hyperbranched polyester, there are 5 branched chains, 25 hydroxyl groups and 10 ester chains connected to the pyran heterocycle, and the phenol functional group can be used as a hydrogen donor , can also participate in various chemical reactions as a hydrogen acceptor, so that tannic acid has corresponding chemical and physiological activities, and has a wide range of applications in food, medicine, leather, daily chemical products and other fields. [0003] Tannin has a large relative molecular weight and many active f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C07G99/00
CPCC08H6/00C07G99/00
Inventor 宋晓峰王艳贺夏文龙魏君格沈月石陈兴
Owner CHANGCHUN UNIV OF TECH
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