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Preparation method of photocrosslinking dynamic reversible supramolecular polymer binder based on lipoic acid-based small molecular compounds

A technology of small molecular compounds and supramolecular polymers, applied in adhesives, etc., can solve problems such as difficult to achieve debonding and recycling, and limitations on permanent changes in reversible adhesion, achieving excellent optical transparency, low production costs, and wide sources Effect

Active Publication Date: 2021-12-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adhesion reversibility is limited by permanent changes in the internal polymer structure
Therefore, high molecular weight polymer binders are often difficult to achieve complete debonding and recycling due to their high viscosity

Method used

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  • Preparation method of photocrosslinking dynamic reversible supramolecular polymer binder based on lipoic acid-based small molecular compounds
  • Preparation method of photocrosslinking dynamic reversible supramolecular polymer binder based on lipoic acid-based small molecular compounds
  • Preparation method of photocrosslinking dynamic reversible supramolecular polymer binder based on lipoic acid-based small molecular compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The structure of the lipoic acid powder used in the present embodiment is shown in formula I:

[0041]

[0042] In formula I, R 1 for hydrogen, R 2 is hydrogen, n is 3.

[0043] Put 10g of lipoic acid powder in a reactor with stirring device, heat the oil bath to 120°C and stir for 10min until the lipoic acid powder melts, then add 6g of 1,3-di(1-methylvinyl)benzene (DIB) To the reactor, continue heating and stirring for 5 minutes. Then add 1 mL of 0.1 g / mL ferric chloride in acetone to the reactor, the mol ratio of lipoic acid or lipoic acid derivatives, cross-linking agent, metal ion source is 1:0.78:0.01, the ratio of metal ion source The number of moles is calculated as the number of moles of metal ions. Continue heating and stirring for 3 minutes, stop heating, pipette 50 μL of molten liquid to a glass with a size of 1 cm × 1 cm while it is hot, and use another glass of the same size to obtain Yellow transparent lipoic acid thermal polymer with a thickness o...

Embodiment 2～8

[0048] Except changing the kind of monomer lipoic acid or lipoic acid derivative and cross-linking agent, and the mol ratio of metal-inorganic salt in monomer lipoic acid or lipoic acid derivative, cross-linking agent and metal ion source, all the other steps and conditions are the same as Same as Example 1, different supramolecular polymers were obtained respectively, see Table 1 for details.

Embodiment 2

[0049] In Example 2, the molar ratio of the lipoic acid or lipoic acid derivatives, the cross-linking agent, and the metal ion source is 1:0.65:0.04, and the moles of the metal ion source are calculated by the moles of metal ions. The concentration of the metal ion source is 0.1 g / mL.

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Abstract

The invention discloses a preparation method of a photocrosslinked dynamic reversible supramolecular polymer adhesive based on lipoic acid small molecule compounds: heating lipoic acid or lipoic acid derivatives with stirring and melting, then adding a crosslinking agent and stirring, and finally Add a metal ion source and stir, stop heating after the reaction is complete, pipette the molten liquid onto the substrate while it is hot, heat press with another substrate to obtain a yellow transparent supramolecular polymer, and irradiate with an ultraviolet-visible light source to obtain the sulfur-based The photocrosslinking dynamic reversible supramolecular polymer adhesive of octanoic acid small molecular compound; the supramolecular polymer adhesive prepared by the present invention mainly carries out crosslinking self-assembly with dynamic disulfide bond, hydrogen bond and metal coordination bond; It has good biocompatibility, high stability, good uniformity, optical transparency and excellent mechanical properties, adhesion properties and reversible recovery.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to a preparation method of a photocrosslinked dynamic reversible supramolecular polymer adhesive based on lipoic acid small molecule compounds. Background technique [0002] The development of high-performance adhesive materials is not only suitable for industrial and social needs, but also has great significance for understanding the chemical factors of bioadhesion. Traditional polymer adhesives often rely on covalent polymer backbones, making it difficult to achieve dynamic properties such as on-demand adhesion and reversible adhesion. Due to the extensive development of supramolecular chemistry, many supramolecular tools have been developed, and reversible non-covalent or dynamic covalent materials are expected to replace traditional covalent materials. Utilizing the existing supramolecular toolbox, supramolecular smart adhesive materials are emerging, who...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G83/00C09J187/00
CPCC08G83/008C09J187/00
Inventor 曲大辉施晨宇张琦王邦森何丹丹
Owner EAST CHINA UNIV OF SCI & TECH