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Comb-shaped water-based polyurethane material imitating mussel mucin structure and preparation method thereof

A water-based polyurethane and mucin technology, applied in the field of functional material production, can solve problems such as high price and difficult preparation

Active Publication Date: 2021-05-18
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a comb-shaped water-based polyurethane material imitating the structure of mussel mucin and a preparation method thereof. Catechol is quantitatively and positionedly introduced into the water-based polyurethane chain to overcome the difficulty in preparing mussel mucin as an adhesive material and the cost. expensive problem

Method used

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  • Comb-shaped water-based polyurethane material imitating mussel mucin structure and preparation method thereof
  • Comb-shaped water-based polyurethane material imitating mussel mucin structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: a kind of preparation method of the comb-shaped water-based polyurethane material imitating mussel mucin structure, comprises the following steps:

[0025] Step 1: Preparation of comb-shaped polyurethane prepolymer containing mercapto groups:

[0026] Mix 12.5mol isophorone diisocyanate (IPDI), 6.25mol polyethylene glycol (PEG600), 2~3 drops of dibutyltin dilaurate (DBTDL), 1.45mol small molecule chain extender 1,4-butanediol Add (BDO) into a three-neck flask equipped with a stirrer and a glass bottle stopper, mix well, heat with a collector type constant temperature heating magnetic stirrer (oil bath), and prepare a polyurethane prepolymer through multiple heating reactions; then add 4.22mol carboxylic acid-type hydrophilic chain extender bismethylol propionic acid (DMPA) was subjected to temperature-raising chain extension reaction at 80°C, and the reaction was continued for 2.5h to obtain PPU, followed by 1.164mol 1,1-diaminoethylsulfur Alcohols underg...

Embodiment 2

[0029] Example 2: see figure 1 A method for preparing a comb-shaped water-based polyurethane material imitating mussel mucin structure, comprising the steps of:

[0030] Step 1: Preparation of mercapto-containing polyurethane prepolymer

[0031] Add 12.5mol toluene-2,4-diisocyanate (MDI), 6.25mol polypropylene glycol (PPG600), 2~3 drops of dibutyltin dilaurate (DBTDL), 1.45mol small molecule chain extender 1,4-butanediol Add (BDO) into a three-neck flask equipped with a stirrer and a glass bottle stopper, mix well, heat with a collector type constant temperature heating magnetic stirrer (oil bath), and prepare a polyurethane prepolymer through multiple heating reactions; then add 3.93mol carboxylic acid-type hydrophilic chain extender dimethylol propionic acid (DMPA) was subjected to a temperature-raising chain extension reaction at 80°C, and the reaction was continued for 2.5h, and finally 1.74mol of sulfhydryl-containing chain extender 1-thioglycerol was added (MON) conduc...

Embodiment 3

[0035] Embodiment 3: a kind of preparation method of the comb-shaped water-based polyurethane material imitating mussel mucin structure, comprises the following steps:

[0036] Step 1: Preparation of mercapto-containing polyurethane prepolymer

[0037] Mix 12.5mol 4,4'-dicyclohexylmethane diisocyanate (HMDI), 6.25mol polyethylene glycol (PEG400), 2~3 drops of dibutyltin dilaurate (DBTDL), 1.45mol small molecule chain extender 1, Add 4-butanediol (BDO) into a three-necked flask equipped with a stirrer and a glass bottle stopper, mix well, heat with a collector-type constant temperature heating magnetic stirrer (oil bath), and prepare polyurethane pre- polymer; then add 3.57mol carboxylic acid type hydrophilic chain extender dimethylolpropionic acid (DMPA) to carry out temperature rise chain extension reaction at 80°C, continue the reaction for 2.5h, and finally add 2.47mol 1,2-dimercapto -1,2-Ethylene glycol undergoes a chain extension reaction to obtain a mercapto-containing ...

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Abstract

The invention relates to a comb-shaped water-based polyurethane material imitating the mussel mucin structure and a preparation method thereof. The present invention aims to solve the problem that the existing mussel mucin is difficult and expensive to prepare as an adhesive material. In order to achieve the purpose, the technical scheme is as follows: first, add a chain extender containing a sulfhydryl group to PPU for reaction to obtain a comb containing a sulfhydryl group. Polyurethane prepolymer, then disperse the dopamine methacrylamide monomer, add it to the prepolymer, then add photoinitiator, react under the irradiation of ultraviolet light, and then neutralize and emulsify the reaction product to obtain the imitation mole A comb-like aqueous polyurethane emulsion with a shell mucin structure. The invention has simple operation route, high reaction efficiency and environmental protection, and the prepared emulsion has good properties, and can be used in fields such as antibacterial coatings, functional adhesive materials, and medical adhesives.

Description

technical field [0001] The invention belongs to the technical field of production of functional materials, in particular to a comb-shaped water-based polyurethane material imitating mussel mucin structure and a preparation method thereof. Background technique [0002] From the membranes formed by bacteria secreting mucus to the adhesion proteins secreted by marine organisms, the expression of adhesion using natural materials is ubiquitous in nature. Especially the mussel adhesion protein with fast curing speed, high bonding strength, and adaptability to harsh environments, mussels can adhere themselves very firmly to the surface of most substrates, even the extremely difficult-to-adhesive polytetrafluoroethylene surface. [0003] Studies have shown that the superior adhesion performance of mussels is mainly due to the presence of an amino acid containing catechol groups in the mussel adhesion protein, known as dopamine (DOPA). Catechol compounds are widely distributed, not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/83C08G18/66C08G18/48C08G18/34C08G18/32C08G18/12
Inventor 任龙芳雷平川强涛涛
Owner SHAANXI UNIV OF SCI & TECH
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