Preparation method of supramolecular polymer films with humidity response and recyclability

A supramolecular polymer and film technology, applied in the chemical field, can solve the problems of multi-step preparation process and few polymer networks, and achieve wide application prospects, good humidity responsiveness and recyclability, improved and enriched functions The effect of sexual characteristics

Active Publication Date: 2021-02-12
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above-mentioned materials have unique self-healing and stretching properties, such materials usually need complex precursors as raw materials, and the preparation process requires multiple steps, and the polymers are mainly cross-linked by covalent bonds, and rarely by supramolecular cross-linking. linking to form a polymer network

Method used

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  • Preparation method of supramolecular polymer films with humidity response and recyclability
  • Preparation method of supramolecular polymer films with humidity response and recyclability
  • Preparation method of supramolecular polymer films with humidity response and recyclability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] With 10g lipoic acid (in formula I, n is 3, R 1 for hydrogen, R 2 Hydrogen) powder and 1.94g sodium hydroxide powder (the molar ratio of lipoic acid and sodium hydroxide is 1:1) was dissolved in a mixed solution of 110mL ethanol and water, the volume ratio of ethanol and water was 10:1, and heated to reflux for 1h , filtered and dried to obtain sodium lipoate powder.

[0047] 5g of sodium lipoic acid powder was dissolved in 5mL of water at a temperature of 70°C, and the yellow solution was coated on a glass substrate by spin coating and evaporated for 4 hours, and formed into a film in an air environment at a temperature of 25°C to obtain the described Supramolecular Polymer Films-1.

[0048] The molecular structure and outward appearance diagram of supramolecular polymer and supramolecular polymer film provided by the present invention are as follows: figure 1 as shown, figure 1 It is the molecular structure and appearance diagram of supramolecular polymer and supram...

Embodiment 2～24

[0054] Change the kind of alkali, raw material ratio (molar ratio of lipoic acid and alkali), alcohol-water mixed solution volume ratio, reflux time, film-forming temperature to obtain different supramolecular polymer films respectively, other are the same as embodiment 1, see table 1 for details .

[0055] Table 1

[0056]

Embodiment 25～33

[0058] Change the lipoic acid derivative type, the type of alkali, the raw material ratio (the molar ratio of lipoic acid and alkali), the volume ratio of the alcohol-water mixture, the reflux time, and the film-forming temperature to obtain different supramolecular polymer films respectively, and the others are the same as in the examples 1, see Table 2 for details.

[0059] Table 2

[0060]

[0061] Described lipoic acid derivative is shown in structural formula II:

[0062]

[0063] R 1 for hydrogen or C 1 ~C 4 Straight chain or branched chain alkyl, R 2 Is hydrogen or carboxyl (-COOH), n is an integer from 1 to 5, R 3 C containing carboxyl 1 ~C 15 Straight chain or branched alkylamino group, C containing carboxyl group 1 ~C 15 Straight chain or branched aryl, C containing carboxyl 1 ~C 15 Straight chain or branched chain alkyl.

[0064] The preparation method of the compound shown in the formula II comprises the following steps:

[0065] Mix lipoic acid ...

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Abstract

The invention discloses a preparation method of a supramolecular polymer film, comprising the following steps: dissolving alkali, lipoic acid and its derivatives in a mixed solution of solvent and water, and dissolving lipoic acid and its derivatives in solvent and water The concentration ratio in the mixed solution ranges from 50g / L to 300g / L, the molar ratio of lipoic acid and its derivatives to alkali is 1:2 to 1:0.5, and the volume ratio of solvent to water is 10:1 to 1:1 , heated to reflux for 1-6 hours, and the filtered powder was dissolved in hot water at 45-90°C. The concentration of the powder dissolved in hot water was 10g / L-2000g / L. It was applied to the substrate and evaporated for 1-6 hours. The film is formed at a temperature of 25-70° C. to obtain the supramolecular polymer film. The raw materials used in the preparation method of the invention are beneficial to the human body, biocompatible, widely sourced, cheap and easy to obtain, and have industrial feasibility.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a method for preparing a supramolecular polymer film with humidity response and recyclability. Background technique [0002] Obtaining supramolecular polymers with ideal structures and functions by controlling the dynamic self-assembly process of small molecules has become a current scientific research hotspot, especially from the perspective of structural engineering to design molecular structures to obtain controllable self-assembly of functional materials. Previous research work often included complicated organic synthesis preparation processes, which made it difficult to carry out the research work smoothly. In recent research work, it was found that the synergistic effect of amorphous polymer chains and ordered crystalline phase packing can promote supramolecular polymers based on lipoic acid and its derivatives to form rubber materials with excellent self-healing propert...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L87/00C08J5/18C08J7/04C08L23/06C08L27/18
CPCC08J5/18C08J2323/06C08J2327/18C08J2487/00C08J7/0427
Inventor 曲大辉邓媛昕张琦施晨宇杨舜赵蔡鑫田禾
Owner EAST CHINA UNIV OF SCI & TECH
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