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MnO2 fiber/CNT-coated polybenzoxazine aerogel and preparation method thereof

A technology of benzoxazine and airgel, which is applied in the field of MnO2 fiber/CNT@polybenzoxazine airgel and its preparation, can solve problems such as difficulty in universality, reduce shrinkage and collapse rate, improve Effects of porosity, increased specific capacitance, etc.

Active Publication Date: 2021-03-16
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many studies have combined carbon nanotubes with manganese dioxide (MnO 2 ) combined (J.Phys.Chem.C 2014,118) to prepare electrode materials with higher specific capacitance (when 1A g -1 , specific capacitance 201F g -1 ), but in some special application environments, it is difficult for them to have the versatility to meet other functional requirements

Method used

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  • MnO2 fiber/CNT-coated polybenzoxazine aerogel and preparation method thereof
  • MnO2 fiber/CNT-coated polybenzoxazine aerogel and preparation method thereof
  • MnO2 fiber/CNT-coated polybenzoxazine aerogel and preparation method thereof

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Embodiment 1

[0040] In this embodiment, a kind of MnO 2 The preparation method of fiber / CNT@polybenzoxazine airgel comprises the following steps:

[0041] 1) Preparation of MnO 2 Fiber / CNT:

[0042] Ultrasonic disperse CNT in 50mL water, add sodium dodecylbenzenesulfonate (SDS) as a surfactant and stir evenly, add MnSO 4 、CH 3 COOK, KClO 3 and acetic acid, stir well. Then transferred to a 100mL polytetrafluoroethylene reactor, reacted at 150-180°C for 12-24 hours, cooled naturally, filtered and washed to obtain MnO 2 fiber / CNT;

[0043] Wherein, the quality of the CNT is 100mg, c CNT :c MnSO4 :c CH3COOK :c KClO3 =1~3:5~15:5~15:10~20, 1.2~4mL of acetic acid.

[0044] 2) Preparation of benzoxazine monomer:

[0045] Phloroglucinol (MTB), aniline (An), and paraformaldehyde were dissolved in toluene and refluxed at 110° C. for 12 hours under nitrogen protection. After rotary evaporation, extract with chloroform and 1M sodium hydroxide aqueous solution, take the organic phase and rota...

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Abstract

The invention discloses MnO2 fiber / CNT-coated polybenzoxazine aerogel and a preparation method thereof. The preparation method comprises the following steps: preparing a benzoxazine monomer by takingcarbon nanotube modified manganese dioxide fiber with good conductivity as a skeleton and phloroglucinol, aniline and paraformaldehyde as raw materials, forming MnO2 fiber / CNT-coated polybenzoxazine wet gel by adopting an acid catalyzed ring-opening polymerization hydrothermal reaction, carrying out solvent replacement for three days, and carrying out freeze drying to maintain the original gel space structure, and eventually obtaining the aerogel. The prepared aerogel is small in stacking effect, large in porosity, low in density and large in specific surface area, and has good mechanical strength and electrical and thermal insulation properties.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to MnO 2 Fiber / CNT@polybenzoxazine airgel and its preparation method. Background technique [0002] Carbon airgel is initially made of resorcinol and formaldehyde as raw materials. After forming a gel under acidic or alkaline conditions, the airgel is obtained by supercritical drying or freeze-drying, and then carbonized. Carbon airgel is a current research hotspot as a catalyst, filter material, thermal insulation material or electrode material. [0003] Due to its low price, high strength, high temperature resistance, flame retardancy, low shrinkage rate, high carbon residue rate and other advantages, benzoxazine is more and more widely used in electronic packaging, aerospace and other industrial fields. However, polybenzoxazine airgel has not been reported as a heat-insulating and conducting material. [0004] As a transition metal oxide, manganese dioxide has a wide range ...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L61/34C08K7/08C08K3/04
CPCC08J9/286C08J2205/026C08J2361/34C08K7/08C08K2201/001C08K2201/011C08K3/041
Inventor 戴李宗刘晓惠杨春英何柳许一婷罗伟昂陈国荣
Owner XIAMEN UNIV
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