电化学处理对碳纤维表面加载碳纳米管的影响机理

doi:10.11868/j.issn.1001-4381.2016.001038

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摘要

利用电化学阳极氧化法改性碳纤维表面，开发了在连续碳纤维表面简单、高效、均匀地加载催化剂涂层的工艺。通过系统研究电化学改性强度对碳纤维表面物理与化学特性、催化剂颗粒与CNTs形貌、多尺度增强体拉伸强度及其增强复合材料层间剪切强度的影响，优化了碳纤维表面电化学改性工艺。结果表明：催化剂颗粒的形貌与分布不仅影响碳纤维表面沉积的CNTs的形貌，而且影响最终碳纤维表面生长CNTs多尺度增强体及其复合材料的力学性能。

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	宋磊
	陈纪强
	范汶鑫
	王成国

关键词 ：碳纤维, 碳纳米管, 电化学处理, 拉伸强度

Abstract：

Based on electrochemical anodic oxidation, an innovative technique was developed to efficiently obtain the uniform catalyst coating on continuous carbon fibers. Through systematic investigation on the effect of electrochemical modified strength on the physical and chemical characteristics of carbon fiber surface, catalyst particles and the morphology of CNTs-grafted carbon fibers, tensile strength of multi-scale reinforcement and the interlaminar shear strength of its reinforced composites, the electrochemical modification process on carbon fibre surface was optimized. The results show that the morphology and distribution of catalyst particles not only affect the morphology of CNTs deposited on the surface of carbon fibres, but also affect the mechanical properties of multi-scale reinforcement and its reinforced composites of CNTs-grafted carbon fibers.

Key words： carbon fiber carbon nanotube electrochemical treatment tensile strength

收稿日期: 2015-09-10 出版日期: 2017-11-18

中图分类号:

TB321

基金资助:国家自然科学基金项目(51573087);山东省自然科学基金项目(ZR2014EZ001)

通讯作者: 宋磊 E-mail: sl13869979076@163.com

作者简介: 宋磊(1967-), 女, 副教授, 主要研究建筑材料, 联系地址:临沂大学土木工程与建筑学院(276000), E-mail:sl13869979076@163.com

引用本文:

宋磊, 陈纪强, 范汶鑫, 王成国. 电化学处理对碳纤维表面加载碳纳米管的影响机理[J]. 材料工程, 2017, 45(11): 15-22.
Lei SONG, Ji-qiang CHEN, Wen-xin FAN, Cheng-guo WANG. Influencing Mechanism of Electrochemical Treatment on Preparation of CNTs-grafted on Carbon Fibers. Journal of Materials Engineering, 2017, 45(11): 15-22.

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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001038 或 http://jme.biam.ac.cn/CN/Y2017/V45/I11/15

Fig.1 碳纤维表面原位生长碳纳米管工艺流程图

Fig.2 不同工艺改性后碳纤维表面催化生长CNTs的表面形貌
(a)未改性; (b)浓HNO₃60℃30min; (c)浓HNO₃常温5h;(d)强度为100C/g电化学改性

Fig.3 不同电解质处理前后碳纤维结构与性能变化 (a)比表面积; (b)酸碱滴定; (c)拉曼光谱; (d)拉伸强度

Fig.4 不同电解电流处理前后碳纤维结构与性能变化 (a)比表面积测试; (b)酸碱滴定; (c)拉曼光谱; (d)拉伸强度

Fig.5 Co作为催化剂时碳纤维经不同强度电化学改性后在其表面加载的催化剂颗粒的形貌
(a)50C/g; (b)100C/g; (c)150C/g

Fig.6 碳纤维经不同强度的电化学改性后在其表面沉积的CNTs的表面形貌
(a)50C/g; (b)100C/g; (c)150C/g

Fig.7 电化学处理强度对CF/CNFs增强体拉伸强度的影响

Fig.8 电化学处理强度对CF/CNTs增强复合材料层间剪切强度的影响

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