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A kind of water-based adhesive and preparation method thereof

A technology of water-based adhesives and polyphenolic compounds, applied in the direction of adhesive additives, non-polymer adhesive additives, etc., can solve the problems of complex preparation process of polymer raw materials, difficult to degrade small molecules, and incapable of mass production, etc. Achieve good self-healing ability, easy to degrade, and easy to form

Active Publication Date: 2021-06-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, the raw materials that make up these water-based adhesives still rely on covalently synthesized polymer materials, which have a large molecular weight and are difficult to degrade into small molecules, and have not fundamentally solved the problem that water-based adhesives are not easy to degrade.
What is even more unfavorable is that the preparation of this water-based adhesive puts forward higher requirements for the design and synthesis of polymer materials, resulting in complex preparation processes, low yields, high costs and high prices for the polymer materials used. At present, it is limited to a small amount of preparation in the laboratory and cannot be mass-produced

Method used

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  • A kind of water-based adhesive and preparation method thereof
  • A kind of water-based adhesive and preparation method thereof
  • A kind of water-based adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] The present invention provides the preparation method of the water-based adhesive described in the above technical scheme, comprising the following steps:

[0042] Dissolving polyphenolic compounds and amino acids in water respectively to obtain a polyphenolic compound solution and an amino acid solution;

[0043] adjusting the pH value of the polyphenolic compound solution to 5.5-7.5 to obtain a polyphenolic compound precursor;

[0044] adjusting the pH of the amino acid solution to 5.5-7.5 to obtain an amino acid precursor;

[0045] The polyphenolic compound precursor solution and the amino acid precursor solution are mixed for cross-linking to obtain a water-based adhesive.

[0046] The invention dissolves polyphenol compound and amino acid respectively in water to obtain polyphenol compound solution and amino acid solution. In the present invention, when the polyphenolic compound is tannic acid, the concentration of the polyphenolic compound solution is preferably...

Embodiment 1

[0057] 8.50g tannic acid (molecular weight is 1701g / mol) is dissolved in 50mL twice distilled water, the pH value of adjusting gained tannic acid solution with NaOH (0.1mol / L) is 7.5, and the aqueous solution changes from light yellow to Brown, to obtain the tannic acid precursor;

[0058] Dissolve 0.85g of lysine (molecular weight: 146.19g / mol) in 50mL of double-distilled water, and adjust the pH value of the resulting lysine solution to 7.5 with HCl (0.1mol / L) to obtain a lysine precursor;

[0059] Under the condition of stirring at 25°C, the lysine precursor solution was added dropwise to the tannic acid precursor solution, and the transparent solution gradually turned into a turbid state, and the resulting mixed solution was allowed to stand for 3 minutes for cross-linking, and the solution changed from turbid to To be transparent, a water-based adhesive was formed at the bottom of the solution with a pH of 7.5.

[0060] Performance Testing

[0061] 1) figure 1 It is a ...

Embodiment 2

[0089] The difference between this example and Example 1 is that the pH value of the preparation process is adjusted to pH=5.5 to prepare a water-based adhesive (the pH value of the water-based adhesive is 5.5), and the others are the same as in Example 1.

[0090] The bonding performance and tensile shear strength of the water-based adhesive were detected according to the method of Example 1. The results show that the tensile shear strength of the water-based adhesive to titanium, glass and polyether ether ketone in water environment is 67±3.1kPa, 35±2.4kPa, 30±1.8kPa respectively; after drying and curing in air The tensile and shear strengths of titanium, glass, and polyetheretherketone are 684±23kPa, 251±11kPa, and 111±9kPa, respectively. This shows that the prepared water-based adhesive has better bonding performance.

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Abstract

The invention provides a water-based adhesive and a preparation method thereof, belonging to the technical field of adhesives. The water-based adhesive provided by the invention comprises the following preparation materials: 1-3 parts of polyphenol compounds, 0.1-4 parts of amino acid, and 1-4 parts of water; the pH value of the water-based adhesive is 5.5-7.5. The water-based adhesive of the present invention uses polyphenolic compounds and amino acids as raw materials, wherein polyphenolic compounds are widely present in various edible plants, have good biocompatibility, and polyphenolic compounds contain ester bonds , can be hydrolyzed, which is beneficial to the degradation of water-based adhesives; amino acids have good biocompatibility, a wide range of sources, and are necessary for the human body, without organic solvents, non-toxic and green. The water-based adhesive provided by the invention has excellent biocompatibility, is easy to degrade, and has good mechanical strength and bonding ability, which solves the problems of poor biocompatibility, high toxicity and refractory degradation of existing water-based adhesives .

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to a water-based adhesive and a preparation method thereof. Background technique [0002] Water-based adhesives or adhesives have the advantages of green, environmental protection, and less pollution. They are considered to be a new generation of adhesive materials and can be used in many fields such as textiles, packaging, decoration, daily life, and medical care, especially in surgical hemostasis and wound healing. , instead of local suturing of special organs in surgery, complete ligation of blocked fallopian tubes, tooth repair, bone and joint bonding, surface treatment and fixation of implanted devices, and cosmetics will play an irreplaceable important role (“cyanoacrylic acid Research progress of ester medical adhesives" Cai Dazhen et al., Military Medicine, 2012, 36(3), 238). [0003] At present, the vast majority of common medical adhesives are water-based adhesives form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/06
CPCC09J11/06
Inventor 李文郑婷婷吴立新
Owner JILIN UNIV