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Adhesive that can be used in both water and air and its preparation method

An adhesive and air technology, applied in the direction of adhesives, etc., can solve the problems of easy oxidation of catechol groups, unstable adhesive adhesive performance, and restrictions on wide application, etc., to achieve easy availability of raw materials, good elasticity and viscosity , highly operable effect

Active Publication Date: 2020-03-13
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adhesive has good wet adhesion strength, good biocompatibility and biodegradability, and low production cost, but the catechol group is easily oxidized, resulting in unstable performance of this type of adhesive. At the same time, this kind of adhesive can only be used in aqueous or high humidity environment, which seriously limits its wide application.
At present, there is no adhesive that can be used both underwater and in the air, and the adhesion performance can be controlled and adjusted according to the actual environment.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0021] The present invention provides a method for preparing an adhesive that can be used in water and air, including the following steps:

[0022] (1) Under the action of an initiator, take temperature-sensitive monomers, hydrophobic alkyl ester monomers, and hydrophilic acrylic monomers as raw materials, and conduct free radical polymerization in a reaction medium to obtain copolymers;

[0023] (2) Mix the copolymer obtained in the step (1) with amino acids, and mix it with 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and N-hydroxysuccinimide Under the action of, carry out grafting reaction to obtain amino acid polymer;

[0024] (3) The amino acid polymer obtained in the step (2) is mixed with water and a metal ion salt, and a complexation reaction is performed to obtain an adhesive that can be used in both water and air.

[0025] Under the action of an initiator, the present invention uses temperature-sensitive monomers, hydrophobic alkyl ester monomers, and hydrophi...

Embodiment 1

[0053] Ca 2+ Preparation method of type adhesive

[0054] (1) 0.000537mol AIBN, 0.01431mol NIPAM, 0.0288mol MEA, 0.007155mol AA (Acrylic acid), dissolved in 9mL DMF, N 2 Under protection, react at 85°C for 12h. After the reaction is over, dissolve the resulting product with 5mL of methanol, then settle with 100mL of ether for 12h, remove the supernatant, and put the sediment in a 60°C vacuum drying oven to dry for 24h to obtain a copolymer;

[0055] (2) Dissolve 0.007155 mol of the above copolymer in 15 mL of methanol to obtain a methanol solution of the copolymer; dissolve 0.0080334 mol of sodium aspartate in 10 mL of deionized water to obtain an aqueous solution of sodium aspartate; Add them dropwise to the methanol solution of the copolymer to obtain a mixed solution; then weigh 0.007155mol EDC and 0.007155mol NHS in 5mL deionized water, add them dropwise to the above mixed solution, grafting reaction for 12h; after the reaction is complete, remove by rotary evaporation Methanol...

Embodiment 2

[0058] Mg 2+ Preparation method of type adhesive

[0059] (1) 0.000537mol AIBN, 0.01431mol NIPAM, 0.0288mol MEA, 0.007155mol AA, dissolved in 9mL DMF, N 2 Under protection, react at 85°C for 12h; after the reaction is over, dissolve the resulting product with 5mL methanol, then settle with 100mL ether for 12h, remove the supernatant, and put the sediment in a 60°C vacuum drying oven for 24h to dry to obtain a copolymer;

[0060] (2) Dissolve 0.007155 mol of the above copolymer in 15 mL of methanol to obtain a methanol solution of the copolymer; dissolve 0.0080334 mol of sodium aspartate in 10 mL of deionized water to obtain an aqueous solution of sodium aspartate; Add them dropwise to the methanol solution of the copolymer to obtain a mixed solution; then weigh 0.007155mol EDC and 0.007155mol NHS into 5mL deionized water, add them dropwise to the above mixed solution, grafting reaction for 12h; after the reaction is over, rotary steam Remove the methanol, then use a dialysis bag wi...

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Abstract

The invention provides adhesive capable of being used in water and air and a preparation method of the adhesive, and belongs to the technical field of the adhesive preparation. The copolymer and the amino acid react, the amino acid molecules are imported on the copolymer, and the amino acid can generate complexing action with different metal ions since the amino acid molecules contain a large amount of carboxy groups, and the hydrophily and the hydratability of the original polymer are greatly reduced after the complexing action, so that the prepared adhesive is strong in water resistance andcan be repeatedly used in the water environment; the adhesive can be used in the air; when the water in the adhesive is volatilized, the interface bonding strength can achieve MPa level. The embodiment shows that the adhesion strength of the Ca<2+> adhesive reaches 0.40 MPa in the air; when the metal ion salt mass concentration is 250 mg / mL, the adhesion strength of the Ca<2+> type adhesive in thewater baths of 20 DEG C and 40 DEG C are 2.60 KPa and 4.06 KPa.

Description

Technical field [0001] The invention relates to the technical field of adhesive preparation, in particular to an adhesive that can be used in water and air and a preparation method thereof. Background technique [0002] Adhesive is a kind of substance that can make two or more materials stick together through the adhesion and cohesion of the interface. According to different sources, it can be divided into natural adhesives and synthetic adhesives. At present, adhesives have been used in all walks of life. The structure of natural adhesives is relatively simple, the bonding force is low, and most of them are water-soluble, which cannot achieve mutual bonding between materials in underwater operations. Therefore, its application is subject to certain restrictions. [0003] Synthetic adhesives can improve the bonding strength of the adhesive and achieve specific functions by designing and regulating characteristic functional units. According to the working conditions, synthetic ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J179/08C08G73/10C08F220/28C08F220/54C08F220/06
Inventor 周峰麻拴红徐蓉年吴杨
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI