Polyionic liquid adhesive and preparation method thereof

A polyionic liquid, ionic liquid technology, applied in the direction of adhesives, etc., can solve the problems of glass transition temperature, bonding strength and waterproof performance, difficult to prepare special adhesives, non-structural adhesives, single structure of ionic liquid monomers, etc. To achieve the effect of convenient adjustment, strong operability, and wide source of raw materials

Active Publication Date: 2020-01-17
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing polyionic liquids with conventional molecular structures (such as conventional imidazolium salt polyionic liquids) are used as adhesives, it is difficult to meet the requirements of adhesives in terms of performance, including glass transition temperature, bonding strength, waterproof performance, etc. ...

Method used

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  • Polyionic liquid adhesive and preparation method thereof
  • Polyionic liquid adhesive and preparation method thereof
  • Polyionic liquid adhesive and preparation method thereof

Examples

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preparation example Construction

[0065] In addition, the present invention also provides a kind of preparation method of polyionic liquid adhesive, it comprises steps:

[0066] S1: Carry out quaternization reaction with alkoxy-containing halogenated hydrocarbons to N-containing heterocyclic small molecules with polymerizable groups to obtain polymerizable alkoxy-functionalized ionic liquid monomers;

[0067] S2: the ionic liquid monomer is subjected to a free radical polymerization reaction under the condition of an initiator to obtain an alkoxy-functionalized polyionic liquid whose anion is a halogen;

[0068] S3: Perform anion exchange reaction on the polyionic liquid to obtain an alkoxy-functionalized polyionic liquid with target anions, which can be directly used as an adhesive or formulated with other polymer groups to form an adhesive.

[0069] In step S1, halogenated hydrocarbons containing alkoxy groups can be selected or prepared according to needs, and the quaternization reaction is carried out in a...

Embodiment 1

[0080] This embodiment provides a method for preparing an imidazole-type bistrifluoromethylsulfonimide salt polyionic liquid adhesive, which includes the following three steps:

[0081] (1) Quaternization reaction: Weigh 0.1mol 2-chloroethyl ether and 0.1mol N-vinylimidazole and dissolve them in 30mL of DMSO, and continuously stir the reaction at 90°C under the condition of continuously feeding inert gas into the flask 48h. After the reaction was completed and cooled, the mixed solution was precipitated in ethyl acetate and the product was collected, and dried in vacuum to obtain an alkoxy-functionalized ionic liquid monomer with a yield of 72%.

[0082] (2) Radical polymerization reaction: Weigh 0.05 mol of the alkoxy-functionalized ionic liquid monomer obtained above and dissolve it in 50 ml of DMSO, add 0.5 mmol of azobisisobutyronitrile as an initiator, and stir to dissolve. Under the condition of continuously feeding inert gas into the flask, the reaction was continuousl...

Embodiment 2

[0085] This example provides a preparation method of an imidazole-type bistrifluoromethylsulfonimide salt polyionic liquid adhesive, which is based on Example 1 by adding the alkoxy-containing halogenated hydrocarbon in step (1) " 2-Chloroethyl ethyl ether" was replaced by "2-(2-ethoxyethoxy)ethyl chloride". Refer to Example 1 for other operations and conditions, and the product is named PIL-2.

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Abstract

The invention relates to a polyionic liquid adhesive which comprises cations and anions, the cations are formed by polymerizing ionic liquid monomers, and alkoxy side groups are contained on structural chains of the cations. Polyionic liquid formed by polymerizing alkoxy functionalized ionic liquid monomers can form very strong hydrogen bonds with the surfaces of most of adhered substrate materials, so that relatively strong adhesive force is brought; meanwhile, hydrogen-bond interaction between the alkoxy side groups and active protons on an imidazole ring or a pyridine heterocyclic ring possibly exists in the polyion liquid adhesive to form a physical crosslinking structure with certain strength, so that the cohesion of the adhesive is improved to a certain extent. Under the combined action of the two aspects, the polyionic liquid adhesive provided by the invention shows excellent adhesive property.

Description

technical field [0001] The invention relates to the field of polymer adhesives, in particular to polyionic liquid adhesives and a preparation method thereof. Background technique [0002] Ionic liquids refer to molten organic salts that are liquid at or near room temperature. Ionic liquids are generally composed of large, asymmetric organic cations and relatively small inorganic anions, and have low volatility (nearly zero vapor pressure), high conductivity, wide electrochemical window, and high thermal stability. and other characteristics. [0003] Polyionic liquids refer to a class of ionic polymers containing ionic liquid structural units (ionic liquid structural monomers) in their molecular structures. Polyionic liquids can be divided into cationic, anionic and amphoteric according to their main side chain structure and charge; according to their different synthesis methods, they can be divided into: directly polymerized from polymerizable ionic liquid monomers and thr...

Claims

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Application Information

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IPC IPC(8): C09J139/04C08F126/06C08F8/34
CPCC08F8/34C08F126/06C09J139/04
Inventor 张世国张妍张俊
Owner HUNAN UNIV
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