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Responsive porous ionic liquid crystal and preparation method thereof

A technology of ionic liquid crystals and liquid crystals, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of liquid-phase porous liquid transportation restricting practical industrial applications, affecting adsorption and separation performance, etc., to solve transportation problems, and the preparation method is simple and easy The effect of high operation and thermal stability

Active Publication Date: 2021-04-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The biggest challenge faced in the preparation of porous liquids: (1) the agglomeration of nanoparticles of porous framework materials affects its adsorption and separation properties; (2) selection of suitable sterically hindered solvents to maintain the permanent porosity of porous liquids; (3) liquid phase Difficulties in porous liquid transport limit its practical industrial application

Method used

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  • Responsive porous ionic liquid crystal and preparation method thereof
  • Responsive porous ionic liquid crystal and preparation method thereof
  • Responsive porous ionic liquid crystal and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Weigh 0.3g of ZIF-8 (200nm) and dissolve it in 10mL of methanol solvent, sonicate for 30mms to make it evenly dispersed;

[0044] (2) Weigh 5.7g of 1-hexane-3-propyltrimethylammonium bis-trifluoromethanesulfonimide salt [C 6 ImC 3 N 111 ][NTf 2 ] 2 , added to (1) at 25°C, magnetically stirred for 24 hours, the stirring rate was 400r / min, and the methanol solvent was naturally volatilized in the open;

[0045] (3) Dry in a vacuum oven at 70°C for 48 hours to obtain ZIF-8 (200nm) / [C 6 ImC 3 N 111 ][NTf 2 ] 2 -PLs (5wt%) porous liquid is standby;

[0046] (4) At 25°C, with a shear rate of 5rad / s and a time of 5mins, the porous ionic liquid crystal ZIF-8 (200nm) / [C 6 ImC 3 N 111 ][NTf 2 ] 2 - PLCs (5 wt%).

Embodiment 2

[0048] (1) Weigh 0.2g of ZIF-67 (450nm) and dissolve it in 15mL of methanol solvent, sonicate for 30mms to make it evenly dispersed;

[0049] (2) Weigh 1.8g of 1-decane-3-propyltrimethylammonium bistrifluoromethylsulfonimide salt [C 10 mime 2 ][NTf 2 ] 2 , added to (1) at 35°C, magnetically stirred for 24 hours, the stirring rate was 400r / min, and the methanol solvent was naturally volatilized in the open;

[0050] (3) Dry in a vacuum oven at 70°C for 24 hours to obtain ZIF-67 / [C 10 ImC 3 N 111 ][NTf 2 ] 2 -PLs (10wt%) porous liquid is standby;

[0051] (4) At 25°C, with a shear rate of 10rad / s and a time of 5mins, the porous ionic liquid crystal ZIF-67 / [C 10 ImC 3 N 111 ][NTf 2 ] 2 - PLCs (10 wt%).

Embodiment 3

[0053] (1) Weigh 0.2g of COF-1 and dissolve it in 15mL of ethanol solvent, sonicate for 30mms to make it evenly dispersed;

[0054] (2) Weigh 1.8g of 1-decane-3-propyltrimethylammonium bistrifluoromethylsulfonimide salt [C 10 mime 2 ][NTf 2 ] 2 , added to (1) at 35°C, magnetically stirred for 24 hours, the stirring rate was 500r / min, and the ethanol solvent was naturally volatilized in the open;

[0055] (3) Dry in a vacuum oven at 70°C for 24 hours to obtain COFs-1 / [C 10 ImC 3 N 111 ][NTf 2 ] 2 -PLs (10wt%) porous liquid is standby;

[0056] (4) At 25°C, the shear rate is 5rad / s, the time is 10mins, and the porous ionic liquid crystal COF-1 / [C 10 ImC 3 N 111 ][NTf 2 ] 2 - PLCs (10 wt%).

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Abstract

The invention relates to a responsive porous ionic liquid crystal and a preparation method thereof. The invention provides preparation of the responsive porous ionic liquid crystal through orderly dispersion of an ionic liquid crystal guiding metal-organic framework (MOF) or covalent organic framework (COF) on a liquid crystal texture, and aims to solve the problems of nanoparticle aggregation and difficulty in porous liquid transportation. The preparation method has the characteristics of simplicity, easiness in operation, no vapor pressure, safety, environmental protection, high thermal stability, rapid force response and the like, and provides a solution for realizing industrial application of the porous liquid in the field of gas adsorption and separation. According to the porous liquid crystal disclosed by the invention, ordered dispersion of porous nanoparticles on the liquid crystal texture is realized, and the problems of agglomeration of the nanoparticles in the porous liquid and transportation of the liquid-phase porous liquid are solved.

Description

technical field [0001] The invention belongs to the technical field of ionic liquid crystal materials, and relates to a responsive porous ionic liquid crystal and a preparation method thereof. Background technique [0002] Ionic Liquids Crystals (ILCs) is a type of combination of ionic liquids (Ionic Liquids, ILs) (low vapor pressure, high thermal stability, designability, non-toxic, etc.) and liquid crystals (Liquids Crystals, LCs) (orientation order, position sequence, ionic conductivity, molecular order, etc.) properties of soft functional materials. The unique characteristics of ILCs have attracted much attention in the fields of ion sensing devices, reaction media, memory materials, and proton / ion separation membranes. It is worth noting that compared with traditional ionic liquids, quaternary ammonium salt-type Gemini ionic liquids have low vapor pressure, wide liquid range, green and non-toxic, and have higher thermodynamic stability, adjustable polarity, and adjusta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/34C09K19/54
CPCC09K19/348C09K19/542C09K2019/548
Inventor 郑亚萍李晓倩姚东东何忠杰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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