碳纤维的电解电位法表面处理  

Surface treatment of carbon fibers by an electrolytic potential method

作　　者：崔迪 李双 王宇[1] 高爱君 童元建[1] CUI Di;LI Shuang;WANG Yu;GAO AiJun;TONG YuanJian(College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《北京化工大学学报(自然科学版)》2025年第2期47-53,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家重点研发计划(2022YFB3706500)。

摘　　要：以自制高强中模碳纤维(CF)为原材料,采用电解电位法探究了电流强度对碳纤维表面处理的影响。采用XPS、动态接触角、层间剪切强度等测试表征研究了电流强度对碳纤维表面化学组成、润湿性能和界面性能的影响。通过电解电位法对碳纤维处理前后结果进行分析发现:电流电压非线性关系表明了碳纤维表面发生氧化反应;随着处理电流的增大,碳纤维表面氧元素含量和氧碳比增加,碳元素含量减小,极性官能团C—OH和O—C=O相对含量在0.3 A以上时提升明显;当处理电流达到0.5 A时,碳纤维与水的动态接触角从90.2°降低到62.4°,处理后碳纤维润湿性得到明显改善,表面活性增加;当处理电流为0.3、0.5 A时,碳纤维与环氧树脂的层间剪切强度为90.35 MPa和99.41 MPa,比未处理时提高了42%和56%;电解电位法表面处理后碳纤维拉伸强度均小幅度提高。An electrolytic potential method has been employed for surface treatment of high-strength medium-modulus carbon fibers(CF).The effect of current intensity on the chemical composition on the surface,wettability of the CF,and the interlayer shear strength(ILSS)was investigated using XPS,dynamic contact angle measurements and ILSS tests.Analysis of the results before and after treatment of CF using the electrolytic poten-tial method showed a deviation of the linear relationship between current and voltage intensity during surface treat-ment.This indicates the occurrence of oxidation reactions on the surface of CF.With increasing current intensity,the oxygen content and the O/C ratio on the surface of CF increased and the carbon content decreased.The main functional groups on the surface of CF were C—OH and O—C=O,and their amount increased markedly for current intensities above 0.3 A.The dynamic contact angle of CF decreased from 90.2°to 62.4°after treatment at 0.5 A,and the wettability of CF significantly improved after treatment,with an increase in surface activity.The ILSS values of epoxy resin and the CF after treatment at current intensities of 0.3 A and 0.5 A and were 90.35 MPa and 99.41 MPa,respectively,which are 42%and 56%higher than the values for untreated CF.A slight increase in the tensile strength of the treated CF was observed after electrolytic potential treatment.

关 键 词：碳纤维 电解电位法 表面处理 化学结构 层间剪切强度 

分 类 号：TB332[一般工业技术—材料科学与工程]