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Preparation method of ionic conductive polyurethane

A polyurethane, ionic technology, applied in the field of preparation of conductive polyurethane, can solve the problems of complicated preparation process, poor solubility, poor film-forming performance, etc., and achieve the effects of simple equipment process, good conductivity and high yield

Inactive Publication Date: 2012-05-09
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of this method are poor film-forming performance and poor solubility in the preparation process of conductive composite materials, poor compatibility with other materials, cumbersome preparation process, and low yield

Method used

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  • Preparation method of ionic conductive polyurethane
  • Preparation method of ionic conductive polyurethane
  • Preparation method of ionic conductive polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Dissolve 0.05 mol of imidazole in 50 ml of acetonitrile, stir until it is completely dissolved and then heat up to 50°C, then add 50 ml of acetonitrile solution containing 0.11 mol of chloroethanol with a dropping funnel, and heat up to 80°C after the addition is complete. Reflux at ~81°C for 24 hours;

[0014] When the reaction is over, cool to room temperature, use a rotary evaporator to distill off acetonitrile under reduced pressure, wash with ethyl acetate three times to remove unreacted chloroethanol, and then dry in vacuum at 80°C for 5 hours to obtain yellow 1,3 -Dihydroxyethylimidazolium chloride salt ionic liquid, standby.

[0015] (2) After dissolving 0.02 mol of toluene diisocyanate (TDI) in 100 ml of N,N-dimethylformamide (DMFA), add a slight excess of 0.021 mol of 1,3-dihydroxyethylimidazolium chloride, and heat up Reaction at a constant temperature of 90~95°C for 12 hours;

[0016] After the reaction, cool to room temperature, pour the reaction mixt...

Embodiment 2

[0018] (1) Dissolve 0.05 mol of imidazole in 50 ml of acetonitrile, stir until it is completely dissolved and then heat up to 50°C, add 50 ml of acetonitrile solution containing 0.13 mol of chloroethanol with a dropping funnel, and heat up to 80°C after the dropwise addition Reflux at ~81°C for 24 hours;

[0019] When the reaction is over, cool to room temperature, use a rotary evaporator to distill off acetonitrile under reduced pressure, wash with ethyl acetate three times to remove unreacted chloroethanol, and then dry in vacuum at 80°C for 5 hours to obtain yellow 1,3 -Dihydroxyethylimidazolium chloride salt ionic liquid, standby.

[0020] (2) After dissolving 0.02 mol of toluene diisocyanate (TDI) in 100 ml of N,N-dimethylformamide (DMFA), add a slight excess of 0.025 mol of 1,3-dihydroxyethylimidazolium chloride, and heat up Reaction at a constant temperature of 90~95°C for 12 hours;

[0021] After the reaction, cool to room temperature, pour the reaction mixture solut...

Embodiment 3

[0023] (1) Take 0.05 mol of imidazole and dissolve it in 50 ml of acetonitrile, stir until it is completely dissolved and heat up to 50°C, add 50 ml of acetonitrile solution containing 0.15 mol of chloroethanol with a dropping funnel, and heat up to 80°C after the dropwise addition Reflux at ~81°C for 24 hours;

[0024] When the reaction is over, cool to room temperature, distill off the solvent acetonitrile with a rotary evaporator under reduced pressure, wash with ethyl acetate three times to remove unreacted chloroethanol, and then vacuum dry at 80°C for 5 hours to obtain yellow 1,3 -Dihydroxyethylimidazolium chloride salt ionic liquid, for subsequent use.

[0025] (2) After dissolving 0.02 mol of toluene diisocyanate (TDI) in 100 ml of N,N-dimethylformamide (DMFA), add a slight excess of 0.03 mol of 1,3-dihydroxyethylimidazolium chloride, and heat up Reaction at a constant temperature of 90~95°C for 12 hours;

[0026] After the reaction, cool down to room temperature, po...

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Abstract

The invention relates to a preparation method of ionic conductive polyurethane, which comprises: dissolving imidazole in acetonitrile, heating to 50 DEG C, adding chloroethanol, wherein the molar ratio of the imidazole to the chloroethanol is 1: (2.1-3), heating to 80-81 DEG C, and carrying out constant-temperature backflow for 24 hours; carrying out vacuum distillation to remove the solvent acetonitrile, washing for three times with ethyl acetate, placing the mixture into a vacuum drying oven, and keeping the temperature of 80 DEG C for 5 hours to prepare 1, 3-dihydroxyethyl imidazolium chloride ionic liquid; adding N, N-dimethylformamide into another container, adding the 1, 3-dihydroxyethyl imidazolium chloride ionic liquid and toluene diisocynate, wherein the molar ratio of the toluene diisocynate to the 1, 3-dihydroxyethyl imidazolium chloride ionic liquid is 1: (1.1-1.5), heating to 90-95 DEG C, and keeping the temperature 12 hours for reaction; and pouring reaction mixture solution into acetone with the amount being twice the amount of the N, N-dimethylformamide in the previous step, keeping the mixture overnight, collecting yellow viscous substances, drying in vacuum, and thus obtaining the ionic conductive polyurethane.

Description

technical field [0001] The invention relates to a preparation method of conductive polyurethane. Background technique [0002] The Chinese invention patent application "Preparation of Soft Conductive Polyurethane Foam" (application number: 200810045009.9) discloses the preparation method of soft conductive polyurethane foam. In this method, a strong oxidant is used to modify the surface of carbon nanotubes, and the surface-modified carbon nanotubes are uniformly dispersed in polyether polyol through a certain dispersion process to obtain a mixture of carbon nanotubes and polyether polyol. Solution, add foaming agent and other various additives into the mixed solution of carbon nanotubes and polyether polyol according to a certain ratio, stir vigorously and mix evenly, then add a certain amount of diisocyanate to fully mix and react, pour into In the mold, the mold cover is closed, and finally the post-curing is carried out to obtain the finished product. [0003] The disad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/32
Inventor 张定军陈玉仙吴有智王晓康赵强王爱芳
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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