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Polymeric ionic liquids ordered structure and preparation method thereof

A technology of polyionic liquids and ionic liquids, which is applied in the field of polyionic liquid ordered bodies and their preparations, can solve problems such as the destruction of assembly order, and achieve the effect of enriching surface functional groups, simple methods, and precise molecular structures

Active Publication Date: 2016-05-04
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the polymerization process, the order of the assembly formed by the ionic liquid monomer is easily destroyed.

Method used

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  • Polymeric ionic liquids ordered structure and preparation method thereof
  • Polymeric ionic liquids ordered structure and preparation method thereof
  • Polymeric ionic liquids ordered structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The preparation method of the ionic liquid monomer is as follows, and the synthetic route diagram is shown in figure 2 :

[0051] a) Add 1-vinylimidazole, 1-bromohexadecane (weight ratio 1:1.5), an appropriate amount of absolute ethanol, and 0.1 g of hydroquinone into a three-neck flask equipped with a reflux condenser, a thermometer and a nitrogen conduit. Under the protection of nitrogen gas, the reaction was stirred at 70-75°C for 24 hours to obtain a light yellow solution.

[0052] b) The obtained product was dissolved in ethanol, and the method of ethyl acetate precipitation was repeated 3-5 times to obtain a white precipitate, which was placed in a vacuum oven at 70° C. to remove the solvent to obtain the product.

[0053] c) the above obtained ionic liquid monomer C 16 Br dissolved in deuterated dimethyl sulfoxide DMSO-d 6 In , the ionic liquid monomer was characterized by NMR, and the characterization results were as follows: Figure 5 shown.

Embodiment 2

[0055] Concrete synthetic examples of polyionic liquid (synthetic route such as image 3 ):

[0056] a) Add N-vinyl-N-hexadecyl imidazole monomer (IL-C 16 Br), AIBN (molar ratio 100:1) and mixed with an appropriate amount of absolute ethanol to form a light yellow homogeneous solution, protected by nitrogen gas, stirred and reacted at 75-80°C for 24 hours, and a yellow-brown solution was obtained.

[0057] b) The obtained product is dissolved in ethanol, and the acetone precipitation is repeated 3-5 times to obtain PIL-C 16 Br.

[0058] c) the obtained polyionic liquid PIL-C 16 Br was dissolved in deuterated dimethyl sulfoxide (DMSO-d 6 ), using NMR to characterize polyionic liquids, the characterization results are as follows Image 6 shown.

[0059] d) Take a small amount of PIL-C at room temperature 16 Br is dissolved in an appropriate solvent (mass fraction 5%), and NaBF 4 The aqueous solution is mixed to obtain a precipitate, which is dried to obtain BF 4 - A po...

Embodiment 3

[0061] Preparation of Polyionic Liquid Ordered Body at Low Concentration in Example 3

[0062] The polyionic liquid prepared in Example 2 was dissolved in an organic solvent at a mass concentration of 5 mg / ml;

[0063] a) The polyionic liquid with Br- as anion is dissolved in n-propanol solvent, and under the stirring of a magnet, the two components are fully recombined to realize self-assembly and obtain an ordered body.

[0064] b) The polyionic liquid with BF4- as anion is dissolved in chloroform solvent, and under the stirring of a magnet, the two components are fully recombined to realize self-assembly and obtain an ordered body.

[0065] c) The polyionic liquid with PF6- as anion is dissolved in chloroform solvent, and the two components are fully compounded under the stirring of a magnet to realize self-assembly and obtain an ordered body.

[0066] Characterization of polyionic liquid self-assembly formation by transmission electron microscopy, as Figure 7 shown. Th...

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Abstract

The invention belongs to the field of a functional polymer material, and especially relates to a polymeric ionic liquids ordered structure and a preparation method thereof. The polymeric ionic liquids ordered structure is prepared by the following steps: ionic liquid monomer free radicals are polymerized, polymeric ionic liquids are obtained and dissolved in an organic solvent, and self-assembly is carried out along with volatilization of the solvent. The ordered structure of the polymeric ionic liquids in the organic solvent comprises two different concentration scopes, and one is an ordered structure which is higher than the critical micelle concentration. Compared with the prior art, the method solves the problem of unstable assembly of the ordered structure which is prepared by 'first assembly and second polymerization' of polymeric ionic liquids, so that the prepared polymeric ionic liquids ordered structure has stability and good mechanical strength. The method has important meanings for deeply understanding spontaneous aggregation process and correlated influence factors of polymeric ionic liquids, formation of ordered aggregation with controllable structures, optimization of preparation technology, etc.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to a polyionic liquid ordered body and a preparation method thereof. Background technique [0002] The formation of ordered bodies refers to a method in which small molecules, polymers, nanomaterials, micron substances, etc. spontaneously form ordered and regular structures. In the process of spontaneous aggregation, ordered bodies are combined by intermolecular forces including hydrogen bonds, electrostatic interactions, hydrophilic-hydrophobic interactions, π-π stacking or van der Waals forces, and aggregate into structures with ordered and regular shapes. Since the imidazole ionic liquid has a hydrophobic alkyl side chain, the imidazole ring and the alkyl chain have different hydrophilicity and hydrophobicity, which makes it have amphiphilic characteristics, and can form an ordered body in the solution. [0003] Polyionic liquids (PILs) are polymers obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F126/06G01N21/84
CPCG01N21/84C08F126/06
Inventor 张伟楼丁硕潘传永葛青
Owner ZHEJIANG SCI-TECH UNIV
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