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High-strength ionic liquid gel and preparation method thereof

An ionic liquid and ionic liquid solvent technology, applied in the field of high-strength ionic liquid gel and its preparation, can solve the problem of insignificant improvement of mechanical properties of ionic liquid gel, achieve excellent self-healing performance, broad application prospects, and improve mechanical properties. performance effect

Active Publication Date: 2021-04-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to solve the technical problem that the mechanical properties of the existing ionic liquid gel are not significantly improved, and provide a high-strength ionic liquid gel and its preparation method

Method used

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  • High-strength ionic liquid gel and preparation method thereof
  • High-strength ionic liquid gel and preparation method thereof
  • High-strength ionic liquid gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-16

[0062] Add physical cross-linking monomer, ionic liquid monomer, dispersing monomer, initiator and ionic liquid solvent into the flask, fully stir and dissolve at room temperature. The mixed solution was deoxygenated and injected into a pre-prepared glass mold through a syringe, and cured under ultraviolet light (365nm wavelength, 8W) for 2h to obtain an ionic liquid gel. The specific substances and amounts used in the physical crosslinking monomer, ionic liquid monomer, dispersing monomer and ionic liquid solvent are shown in Table 1. The initiators are all 2-hydroxy-4-(2-hydroxyethoxy)-2-methylpropiophenone, and the concentration of the initiator in the ionic liquid solvent is 0.00625g / mL.

[0063] Raw materials and proportioning of table 1 embodiment 1-16

[0064]

[0065]

[0066] Performance tests were performed on the ionic liquid gels of Examples 1-16.

[0067] 1.1 Gel mechanical properties test

[0068] Test method: Use a 2mm thick mold to prepare the ionic li...

Embodiment 3

[0074] With embodiment 3 ( figure 1 )AAm / [VBIm][BF 4 ] / DMAA / [BMIm][BF 4 ] system as an example, dissolved in deuterated DMSO after polymerization at different times, and monitored the monomer conversion process by Bruker 400MHz DRX spectrometer. where [VBIm][BF 4 ], the double bond characteristic peak is located at 7.2-7.4ppm, the double bond characteristic peak of DMAA is located at 6.7-6.9ppm, and the characteristic peak of AAm is located at 5.55-5.7ppm, which can be obtained by referring to the ionic liquid [BMIm][BF 4 ] The methyl peak area on the alkyl chain was calculated to obtain the conversion data. Such as figure 1 As shown, in the initial stage of polymerization, the conversion rates of DMAA and AAm are higher than that of [VBIm][BF 4 ], forming polymer chains with higher crosslink density. As the polymerization proceeds, the proportion of unreacted DMAA and AAm in the system decreases, [VBIm][BF 4 ] The proportion of monomers increases instead, so polymer ch...

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Abstract

A high-strength ionic liquid gel and a preparation method thereof belong to the technical field of liquid gel. The technical problem that the mechanical properties of the existing ionic liquid gel are not significantly improved is solved. The ionic liquid gel of the present invention is prepared by in-situ free radical polymerization of physical crosslinking monomers, ionic liquid monomers and dispersing monomers in ionic liquid solvents by initiators; wherein, the physical crosslinking monomers can form after polymerization The monomer of the physical crosslinking site; the ionic liquid monomer is an ionic liquid grafted with a double bond polymerization site; the dispersing monomer is a monomer with a non-polar group; the anionic structure of the ionic liquid solvent and the ionic liquid The anion structure of the monomer is the same, the cationic structure of the ionic liquid solvent removes the double bond from the cationic structure of the ionic liquid monomer, and the non-polar alkyl chain lengths on the cations of the ionic liquid monomer and the ionic liquid solvent are the same or different. The ionic liquid gel has excellent mechanical properties and self-healing properties, and its ion conductivity can be adjusted for long-term use.

Description

technical field [0001] The invention belongs to the technical field of liquid gel, and in particular relates to a high-strength ionic liquid gel and a preparation method thereof. Background technique [0002] With the rapid development of the modern electronics industry, flexible electrolytes with excellent tensile properties, compressive properties, and ion transport properties are required in some fields, such as flexible and wearable devices and soft robots. [0003] Gel materials have excellent mechanical properties and can be used as solid electrolytes in supercapacitors and solid-state lithium-ion batteries, enabling the devices to obtain advantages such as high energy density, fast charge and discharge, and long cycle life, which has attracted extensive attention from researchers. With the vigorous development of the gel field, many special solvents have also been developed for the preparation of gel materials with special functions. Ionic liquids are organic salts w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/06C08F220/56C08F220/44C08F220/54C08F220/14
CPCC08F226/06C08F220/56C08F220/54C08F220/14C08F220/44
Inventor 杨小牛俞晓峰吕红英秦泽昭吴海洋袁黎光屈宝留
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI