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Preparation of Highly Dispersed Aqueous Carbon Fibers
Received:September 22, 2023  
DOI：10.11980/j.issn.0254-508X.2024.04.005
Key Words:BMH3 carbon fiber  carbon fiber paper  surface modification  dispersant  dispersibility
Fund Project:北京市科技计划（Z211100004521001）。
Author NameAffiliationPostcode
CAO Hongshuo State Key Lab of Organic-Inorganic Composite， Beijing University of Chemical Technology， Beijing， 100029 100029
ZHOU Mingzheng State Power Investment Hydrogen Energy Technology Development Co.， Ltd.， Beijing， 100162 100162
AO Jing State Power Investment Hydrogen Energy Technology Development Co.， Ltd.， Beijing， 100162 100162
QIAO Weijing State Power Investment Hydrogen Energy Technology Development Co.， Ltd.， Beijing， 100162 100162
CHEN Yujiao State Power Investment Hydrogen Energy Technology Development Co.， Ltd.， Beijing， 100162 100162
ZHANG Shuimu State Power Investment Hydrogen Energy Technology Development Co.， Ltd.， Beijing， 100162 100162
TIAN Yanhong State Key Lab of Organic-Inorganic Composite， Beijing University of Chemical Technology， Beijing， 100029 100029
ZHANG Xuejun* State Key Lab of Organic-Inorganic Composite， Beijing University of Chemical Technology， Beijing， 100029 100029
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Abstract:In this study， chitosan hydrochloride （CHI） and sodium dodecyl sulfate （SDS） were used to prepare modifier （CHI&SDS） that used to impregnate and modify the surface of BMH3 carbon fibers， in order to enhance the dispersing ability of the BMH3 carbon fibers in water. The effects of CHI/SDS mass ratio， mass concentration of CHI&SDS modifier， and fiber length on the dispersibility of modified BMH3 carbon fibers in water were systematically investigated， and the chemical structure and surface wettability of the modified BMH3 carbon fibers were characterized and tested by X-ray photoelectron spectroscopy and dynamic contact angle test. The results showed that the dispersion rate of modified BMH3 carbon fibers with fiber length of 5 mm in water could reach 96.2%， which was 87.5 percentage points higher compared with that of unmodified BMH3 carbon fibers， after modified with a solution of CHI/SDS mass ratio =25∶1 at CHI&SDS modifier mass concentration of 0.15%. The number of oxygen-containing functional groups on the surface of the modified carbon fiber was significantly increased， and the water contact angle was significantly reduced， which was the reason for the improved dispersion of the carbon fiber and the basis for the successful preparation of highly dispersed aqueous carbon fiber.
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