Preparation method of high-strength double-network adhesive gel for seawater

A high-strength, double-network technology, applied in the direction of alginic acid adhesives, adhesives, etc., can solve the problem that underwater adhesives cannot meet long-term stable adhesion biocompatibility at the same time, and achieve slow storage modulus and mechanical properties. The performance and preparation process are simple and fast, and the effect of slowing down the rapid decline

Active Publication Date: 2019-10-25
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem: In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a preparation method for high-strength double-network adhesive gel used in seawater, so as to solve the problem that the existing underwater adhesives cannot meet the requirements of long-term stability at the same time. Adhesion, good biocompatibility, and efficient loading and release of active substances are issues

Method used

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  • Preparation method of high-strength double-network adhesive gel for seawater
  • Preparation method of high-strength double-network adhesive gel for seawater
  • Preparation method of high-strength double-network adhesive gel for seawater

Examples

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Effect test

Embodiment 1

[0034] (1) Dissolve 2.7mL triethanolamine in 100mL deionized water, and adjust the pH of the solution to 9.8 with 1mol / L hydrochloric acid;

[0035] ⑵Add 12g of acrylamide and 96mg of N′,N-methylenebisacrylamide to 100mL of the solution in step ⑴ in sequence, and stir well to form a precursor solution of adhesive gel;

[0036] (3) Dissolve 0.6g of ammonium persulfate in 1mL of the solution in step (1) to prepare an initiator solution;

[0037] (4) Add 0.1mL of the solution in step (3) dropwise to 5mL of the solution in step (2), stir quickly and evenly, pour it into the mold, and let it stand naturally until gelling;

[0038] (5) Take out the reacted gel material in step (4), and wash the surface repeatedly with deionized water at least three times to remove unreacted monomers, or completely soak the reacted gel material in a sufficient amount of artificial seawater for three days. After the above treatment procedures, the polyacrylamide adhesive gel is obtained.

Embodiment 2

[0040] (1) Dissolve 2.7mL triethanolamine in 100mL deionized water, and adjust the pH of the solution to 9.8 with 1mol / L hydrochloric acid;

[0041] ⑵Dissolve 72mg of dopamine hydrochloride monomer in 100mL of the solution in step ⑴, stir well and evenly, and keep it under stirring in natural environment for 20min until dopamine self-polymerizes to form polydopamine / triethanolamine aqueous solution;

[0042] (3) Add 12g of acrylamide and 96mg of N′,N-methylenebisacrylamide to 100mL of the solution in step (2) in sequence, and stir well to form a precursor solution for the adhesive gel;

[0043] (4) Dissolve 0.6g of ammonium persulfate in 1mL of step (1) solution to prepare an initiator solution;

[0044] (5) Add 0.1mL of the solution in step (4) dropwise to 5mL of the solution in step (3), stir quickly and evenly, pour it into the mold, and let it stand for a natural reaction until gelling;

[0045] (6) Take out the reacted gel material in step (5), wash the surface repeatedly ...

Embodiment 3

[0047] (1) Dissolve 2.7mL triethanolamine in 100mL deionized water, and adjust the pH of the solution to 9.8 with 1mol / L hydrochloric acid;

[0048] (2) Dissolve 0.5g of sodium alginate in 100mL of the solution of step (1), stir well, and prepare a 0.5wt.% sodium alginate / triethanolamine aqueous solution;

[0049] (3) Dissolve 72mg of dopamine hydrochloride monomer in 100mL of the solution in step (2), stir well, and keep stirring in a natural environment for 20 minutes until dopamine self-polymerizes to form polydopamine / sodium alginate / triethanolamine aqueous solution;

[0050] (4) Add 12 g of acrylamide and 96 mg of N', N-methylenebisacrylamide to 100 mL of the solution in step (3) in sequence, and stir well to form a precursor solution of high-strength underwater adhesive gel;

[0051] (5) Dissolve 0.6g of ammonium persulfate in 1mL of the solution in step (1) to prepare an initiator solution;

[0052] ⑹Take 0.1mL of the solution in step ⑸ and add dropwise to 5mL of the s...

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Abstract

The invention discloses a preparation method of high-strength double-network adhesive gel for seawater. According to the preparation method, monomer-dopamine hydrochloride containing a catechol groupis auto-polymerized and then mutually and physically wound with an acrylamide monomer, and a first network structure is constructed through a typical preparation method of polyacrylamide hydrogel; andsodium alginate serves as a natural polymer extracted from an ocean, and a second network structure is further formed under chelating action of calcium ions in the seawater. All raw materials adoptedin the preparation process are easy to obtain and low in cost, a preparation technique is simple and convenient, and operation, control and large-scale industrial production are easy. Through the prepared adhesive gel, in the seawater environment, the process that the glued face is infiltrated by an adhesive and the process that water is dispersed towards the adhesive and bonded can be synchronously completed, and under the premise of maintaining mechanical strength of the gel, stable adhering of the adhesive and stable releasing of active factors in the interface dynamic process are ensuredwhile durable adhesive power is provided for an interface.

Description

technical field [0001] The invention belongs to the field of underwater adhesive preparations, and in particular relates to a preparation method of a high-strength double-network adhesive gel material suitable for use in seawater. Background technique [0002] Adhesives are a class of substances that can bond two separate materials together by virtue of their own stickiness. There are many kinds of adhesives, which can be divided into natural adhesives and chemically synthesized adhesives according to the source, and can be divided into thermosetting, thermoplastic, viscoelastic and hybrid adhesives according to the properties of the polymer. They play different roles in different application fields. specific effect. Among them, hydrogel, as a polymer swelling body formed by cross-linking polymer chains to form a three-dimensional network structure, has special rheological properties, good ductility, compressibility and strong toughness, and is a typical Viscoelastic adhes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J135/00C09J105/04C09J179/04C08F220/56C08F222/38
CPCC08F220/56C09J135/00C08L5/04C08L79/04C08F222/385
Inventor 张天柱梁敏陆祖宏何春鹏
Owner SOUTHEAST UNIV
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