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Preparation method of photoresponsive anisotropic azo polymer/carbon tube composite film

A technology of azo polymer and carbon tube film, which is applied in the field of preparation of azo polymer/carbon tube composite film, can solve the problems of no self-support, complicated preparation process, etc., and achieves high conductivity, good repeatability, The effect of improving conductivity

Active Publication Date: 2019-03-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photo-electric responsive azo polymers currently studied are usually not self-supporting, usually very thin, and the preparation process is complicated

Method used

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  • Preparation method of photoresponsive anisotropic azo polymer/carbon tube composite film
  • Preparation method of photoresponsive anisotropic azo polymer/carbon tube composite film
  • Preparation method of photoresponsive anisotropic azo polymer/carbon tube composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Synthesis of azo polymers: polycondensation reaction between methyl methacrylate and azobenzene in a molar mass ratio of 1:5, the amount of initiator azobisisobutyronitrile (AIBN) added is methacrylic acid 1wt.% of the amount of methyl ester added. First, add methyl methacrylate and AIBN into a three-necked flask, and blow nitrogen at 25°C to remove the air in the system. Dissolve azobenzene in dichloromethane and slowly add it dropwise to the methyl methacrylate system, and the dropwise addition is completed within half an hour. The temperature was raised to 60° C. for the reaction, and the reaction was completed for 3 hours to obtain an azo polymer.

[0037] (2) Carbon tube membrane modification: Add 0.1mol / L p-phenylenediamine solution dropwise to 0.1mol / L HCl solution at a volume ratio of 1:1 to obtain an acidic p-phenylenediamine solution; at 0°C Under certain conditions, 0.1mol / L sodium nitrite solution is added dropwise into the acidic p-phenylenediamine so...

Embodiment 2

[0040] (1) Synthesis of azo polymers: polycondensation reaction between methyl methacrylate and azobenzene at a molar mass ratio of 1:15, the amount of initiator azobisisobutyronitrile (AIBN) added is methacrylic acid 3wt.% of the amount of methyl ester added. First, add methyl methacrylate and AIBN into a three-necked flask, and blow nitrogen at 25°C to remove the air in the system. Dissolve azobenzene in dichloromethane and slowly add it dropwise to the methyl methacrylate system, and the dropwise addition is completed within half an hour. The temperature was raised to 75° C. for the reaction, and the reaction was completed for 8 hours to obtain an azo polymer.

[0041] (2) Carbon tube membrane modification: Add 0.5mol / L p-phenylenediamine solution dropwise to 0.1mol / L HCl solution at a volume ratio of 1:1 to obtain an acidic p-phenylenediamine solution; at 0°C Under certain conditions, add 0.5 mol / L sodium nitrite dropwise into the acidic p-phenylenediamine solution to re...

Embodiment 3

[0052] (1) Synthesis of azo polymers: polycondensation reaction between methyl methacrylate and azobenzene in a ratio of 1:50 by molar mass ratio, and the addition amount of initiator azobisisobutyronitrile (AIBN) is methacrylic acid 2wt.% of the amount of methyl ester added. First, add methyl methacrylate and AIBN into a three-necked flask, and blow nitrogen at 25°C to remove the air in the system. Dissolve azobenzene in dichloromethane and slowly add it dropwise to the methyl methacrylate system, and the dropwise addition is completed within half an hour. The temperature was raised to 85° C. for reaction, and the reaction was completed in 12 hours to obtain an azo polymer.

[0053] (2) Carbon tube membrane modification: Add 0.8mol / L p-phenylenediamine solution dropwise to 0.1mol / L HCl solution at a volume ratio of 1:1 to obtain an acidic p-phenylenediamine solution; at 5°C Under certain conditions, add 0.8 mol / L sodium nitrite dropwise into the acidic p-phenylenediamine so...

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Abstract

The invention relates to a preparation method of antisotropic azo polymer / carbon tube composite thin film with photo-responsitivity. An azo polymer and a modified carbon tube composite film are prepared into a flexible polymer thin film with in plane anisotropy through synthesis of the azo polymer and modification of a carbon tube film; a flexible thin film with in-plane conducting anisotropy can be obtained through polymer molecular chains are orientated along a carbon tube under the induction of the carbon tube, and the conductivity in the in-plane horizontal direction is higher than that in the direction which is vertical to the carbon tube by one order of magnitude; under UV (Ultraviolet) irradiation, the conductivity of an azo polymer-carbon tube composite film is changed, and since azo molecules are in cis-trans isomerization under the UV irradiation and the molecular distance of a cis structure is reduced, higher conductivity is obtained; the conductivity of the azo polymer-carbon tube composite flexible thin film has good repeatability along with the change of irradiation, and good photo-responsitivity is expressed by the azo polymer-carbon tube composite flexible thin film; the antisotropic azo polymer / carbon tube composite thin film is expected to be applied to many fields of aerospace, organic photoelectric devices and the like.

Description

technical field [0001] The invention relates to a preparation method of a photoresponsive azo polymer / carbon tube composite film. The composite film exhibits good electrical conductivity under the irradiation of ultraviolet light and is used in optical switches, sensors, and organic field effect thin film transistors. , field emission electronic devices and other fields have broad application prospects. The invention belongs to the field of composite material synthesis and preparation. Background technique [0002] Due to the characteristics of tunable electronic properties, easy processing, simple structure, excellent mechanical flexibility, and low production cost, polymer materials have become a new type of research potential that can replace traditional semiconductor materials such as Si, Ge, and GaAs. Materials (Gang Liu et al., "Electrical Conductivity Switching and Memory Effects in poly(N-Vinylcarbazole) Derivatives with Pendant Azobenzene Chromophores and Terminal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L33/12C08L33/14C08F220/34C08F220/14C08K7/00C08K9/04C08K3/04
CPCC08F220/14C08F220/34C08J5/18C08J2333/12C08J2333/14C08K3/04C08K7/00C08K9/04
Inventor 封伟李双雯冯弈钰
Owner TIANJIN UNIV
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