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A kind of preparation method of bulk type high-strength bionic adhesive

A bionic adhesive, high-strength technology, applied in adhesive types, unsaturated alcohol copolymer adhesives, etc., can solve the problems of organic solvents, slow curing speed, long curing time, etc., and achieve low melting temperature , fast curing speed, the effect of breaking through the technical bottleneck

Inactive Publication Date: 2017-04-19
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of rapid curing body-type bionic mussel glue to solve the problems of slow curing speed, long curing time and organic solvent in the existing bionic mussel glue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Add 10 g of polyvinyl alcohol (average molecular weight 5000, degree of hydrolysis 88%) and 100 mL of dimethylformamide into the reaction flask, add 0.1 g of p-toluenesulfonic acid and 15.3 g of 3,4-dihydroxybenzoic acid (approx. 1 / 2 of the hydroxyl content of polyvinyl alcohol (mol), mole fraction), stirred and reacted at 50°C for 10h; the system was cooled to room temperature, precipitated in water, washed repeatedly with water for 3 times, and dried in vacuum to obtain a bionic adhesive (23.1g ).

Embodiment 2

[0018] Add 10 g of polyvinyl alcohol (average molecular weight 110,000, degree of hydrolysis 50%) and 100 mL of dimethyl sulfoxide into the reaction bottle, and add 1-ethyl-3-(3-dimethylaminopropyl) carbonyl 1g of diimine hydrochloride, 1.7g of 3,4-dihydroxybenzoic acid (about 1 / 10 of the hydroxyl content (mol) of polyvinyl alcohol), stirred and reacted at 100°C for 10h; cooled the system to room temperature, precipitated in water, The precipitate was repeatedly washed with water three times, and dried in vacuum to obtain a biomimetic adhesive (10.2 g).

Embodiment 3

[0020] Add 10 g of polyvinyl alcohol (average molecular weight 67,000, degree of hydrolysis 88%) and 100 mL of dimethyl sulfoxide into the reaction flask, add 0.01 g of trifluoromethanesulfonic acid and 9.1 g of 3,4-dihydroxyphenylpropionic acid under the protection of argon (about 1 / 4 of the hydroxyl content (mol) of polyvinyl alcohol), stirred and reacted at 80°C for 10 hours; the system was cooled to room temperature, precipitated in water, washed repeatedly with water for 3 times, and dried in vacuum to obtain a biomimetic adhesive (18.3g) .

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Abstract

The present invention relates to a body-type high-strength bionic adhesive preparation method, which comprises: adding polyvinyl alcohol and a solvent to a reaction kettle, adding a catalyst and a pyrocatechol-containing compound under protection of argon or nitrogen, carrying out a stirring reaction for a certain time at a temperature of 50-100 DEG C, cooling the system to a room temperature, precipitating in water, repeatedly washing the precipitate by using water, and carrying out vacuum drying to obtain the bionic adhesive. According to the present invention, the adhesive is synthesized by using the one-step method, such that the operation scale-up and the industrial production are easily achieved; the adhesive is the body-type adhesive, the curing is rapid, and the strength achieves more than or equal to 6 MPa; the adhesive has the wide substrate universality, and is suitable for adhesion of metals, plastics, glasses, ceramics, bones and the like, and is further suitable for preparation of formaldehyde-free wood-based plates; and the perfect combination of the synthetic polymer and the natural mussel adhesion protein is achieved, the technical bottleneck of the current bionic mussel adhesive is expected to be broken through, and the new approach is provided for the development of the bionic polymer materials based on shellfish.

Description

technical field [0001] The invention relates to a preparation method of a body-type high-strength biomimetic adhesive, in particular to a preparation method of a polyvinyl alcohol-based biomimetic adhesive with high strength and good biocompatibility. Background technique [0002] Mussel protein is known for its high ability to adhere to different substrate surfaces. According to the principle of bionics, by combining mussel adhesion protein functional elements (catechol groups) with synthetic polymers, the purpose of replicating or even surpassing the adhesion effect of natural mussel adhesion protein is achieved, which is currently the field of bionic adhesives. One of the research hotspots. Due to the wide range of polymer synthesis methods and structural design and the adjustable performance, reports on the synthesis of bionic mussel glue have emerged in an endless stream in recent years, and there are many patent reports in this area, such as: US2003087338, US200903661...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J129/04C08F116/06C08F8/14
Inventor 万晓波穆有炳
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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