Preparation and application of plant fiber-based reinforced carbon fiber network

A plant fiber and carbon fiber technology, applied in the direction of carbon fiber, fiber treatment, fiber chemical characteristics, etc., can solve the problems of poor compression deformation stability and low mechanical strength of carbon airgel

Active Publication Date: 2021-01-29
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the existing carbon airgel preparation technology and the shortcomings of low mechanical strength and poor compression deformation stability of the carbon airgel prepared by using plant fibers, the present invention proposes to use sodium periodate to selectively oxidize and freeze-dry plant fibers. On the basis of maintaining the morphology of the fiber network after carbonization, the in situ synthesized conductive polymer polydopamine is used to appropriately increase the bonding strength between carbon fibers in the carbon fiber network to prepare a reinforced carbon fiber network

Method used

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  • Preparation and application of plant fiber-based reinforced carbon fiber network
  • Preparation and application of plant fiber-based reinforced carbon fiber network
  • Preparation and application of plant fiber-based reinforced carbon fiber network

Examples

Experimental program
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Effect test

Embodiment 1

[0021] After shredding the commercial coniferous wood pulp board and soaking it with deionized water overnight, use a fiber disintegrator to decompose at 10,000 rpm, dissolve 5 parts of sodium periodate in 95 parts of deionized water, and configure 100 parts of sodium periodate solution; Take 5 parts of coniferous wood pulp and disperse in the above 100 parts of sodium periodate solution. After the dispersion is uniform, the dispersion system is heated to 40 ° C, reacted for 2 hours, dehydrated, centrifugally washed with deionized water for 3 times, filtered to form, and freeze-dried Finally, a cellulose fiber network with a thickness of about 5 mm was obtained. Place the dried cellulose fiber network in a tube furnace, pass nitrogen gas, and drive the air out of the furnace, then raise the temperature to 300°C at a rate of 2°C / min under the protection of nitrogen, keep it warm for 2 hours, and continue to heat at a temperature of 2°C / min. The temperature was raised to 800°C a...

Embodiment 2

[0024] After shredding the commercial coniferous wood pulp board and soaking it overnight with deionized water, use a fiber disintegrator to decompose at 10,000 rpm, dissolve 5 parts of sodium periodate in 95 parts of deionized water, and configure 100 parts of sodium periodate solution; Take 5 parts of coniferous wood pulp and disperse in the above 100 parts of sodium periodate solution. After the dispersion is uniform, heat the dispersion system to 30°C, react for 3 hours, dehydrate, wash with deionized water for 3 times, filter to form, and freeze-dry Finally, a cellulose fiber network with a thickness of about 5 mm was obtained. Place the dried cellulose fiber network in a tube furnace, ventilate nitrogen, and drive the air out of the furnace, then raise the temperature to 300°C at a rate of 3°C / min under the protection of nitrogen, keep it warm for 2 hours, and continue to heat at a temperature of 3°C / min. The temperature was raised to 800°C at a speed of 1 minute, kept f...

Embodiment 3

[0027] After shredding the commercial coniferous wood pulp board and soaking it with deionized water overnight, use a fiber disintegrator to decompose at 10,000 rpm, dissolve 5 parts of sodium periodate in 95 parts of deionized water, and configure 100 parts of sodium periodate solution; Take 5 parts of coniferous wood pulp and disperse in the above 100 parts of sodium periodate solution. After the dispersion is uniform, the dispersion system is heated to 40 ° C, reacted for 2 hours, dehydrated, centrifugally washed with deionized water for 3 times, filtered to form, and freeze-dried Finally, a cellulose fiber network with a thickness of about 5 mm was obtained. Place the dried cellulose fiber network in a tube furnace, pass nitrogen gas, and drive the air out of the furnace, then raise the temperature to 300°C at a rate of 2°C / min under the protection of nitrogen, keep it warm for 2 hours, and continue to heat at a temperature of 2°C / min. The temperature was raised to 800°C a...

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Abstract

The invention provides a plant fiber reinforced carbon fiber network, and belongs to the technical field of flexible pressure sensors. Steps of adding plant fibers into a periodic acid solution to form a paper pulp suspension, and heating to react to obtain a plant fiber network; calcining the dried plant fiber network, and taking out to obtain a carbon fiber network; immersing the carbon fiber network into a dopamine hydrochloride solution, and reacting, washing and drying are carried out to obtain the plant fiber-based reinforced carbon fiber network. The plant fiber reinforced carbon fibernetwork prepared by the invention is applied to a flexible piezoresistive pressure sensor, the compression strength of the carbon fiber network is greatly improved, and the plant fiber reinforced carbon fiber network has the advantages of short response time, large response current, low detection limit, wide working range and good anti-fatigue stability.

Description

technical field [0001] The invention relates to the preparation of a plant fiber-based reinforced carbon fiber network and its application as a piezoresistive pressure sensor, belonging to the technical field of flexible pressure sensors. Background technique [0002] Flexible pressure sensors have gained increasing attention in areas such as wearable electronics, health monitoring, and intelligent robots. Piezoresistive flexible pressure sensors that convert external pressure into resistive signals have been extensively studied due to their advantages of simple structure, low fabrication cost, high sensitivity, and convenient signal collection. A piezoresistive flexible pressure sensor usually consists of flexible sensing components, electrodes and wires. Among them, the flexible sensing part is a key part of the flexible pressure sensor, which is usually composed of flexible, deformable elastic conductive composite materials or conductive aerogels or sponges with deformab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/37D01F9/16G01L1/18D06M101/40
CPCD06M15/37D01F9/16G01L1/18D06M2101/40
Inventor 刘温霞李程龙李国栋于得海王慧丽宋兆萍
Owner QILU UNIV OF TECH
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