高模量碳纤维表面双金属MOFs结构的构筑  

Construction of bimetallic MOFs structures on surface of high modulus carbon fibers

作　　者：李淑君 钱鑫 张永刚 朱雪 张振江 吴昊男 蔡晨阳 朱小龙 LI Shujun;QIAN Xin;ZHANG Yonggang;ZHU Xue;ZHANG Zhenjiang;WU Haonan;CAI Chenyang;ZHU Xiaolong(School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China;National Engineering Laboratory for Carbon Fiber Preparation Technology,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China;National Measurement and Testing Center for Magnetic Materials Industry,Ningbo Inspection and Testing Center for New Materials,Ningbo Institute of Measurement and Testing,Ningbo 315048,China)

机构地区：[1]宁波大学材料科学与化学工程学院,宁波315211 [2]中国科学院宁波材料技术与工程研究所碳纤维制备技术国家工程实验室,宁波315201 [3]宁波市计量测试研究院宁波新材料检验检测中心国家磁性材料产业计量测试中心,宁波315048

出　　处：《中国有色金属学报》2024年第5期1636-1651,共16页The Chinese Journal of Nonferrous Metals

基　　金：浙江省“尖兵”“领雁”研发攻关计划资助项目(2021C01004);宁波市自然科学基金重点资助项目(202003N4027)。

摘　　要：经高温热处理制备得到的碳纤维具有高惰性表面结构,导致其与基体之间的润湿性较差。为了改善碳纤维与基体间的界面性能,本研究通过采用阴极电沉积法在高模量碳纤维表面原位生长金属有机框架(MOFs)材料,在纤维表面同时引入两种不同金属元素,研究双金属MOFs的引入机制、形貌及其对性能的影响。结果表明:双金属MOFs材料呈一定取向的绣球状形貌,经退火后演变成疏松多孔结构,该结构可显著提高高模量碳纤维表面粗糙度及界面黏结性;双金属MOFs的成核与生长取决于金属还原性,还原性越强、MOF生长速率更快,且沉积量更高;双金属MOFs结构的引入使得纤维电阻率下降至0.05×10^(−5)Ω∙cm,导电性能提升,独特的三维多孔结构也赋予高模量碳纤维高温环境下优异的热稳定性。The carbon fiber obtained by high-temperature heat treatment has a highly inert surface structure,which leads to poor wettability between the carbon fiber and the matrix.In order to improve the interface properties between carbon fiber and the matrix,this study used cathodic electrodeposition to in-situ grow metal-organic framework(MOF)materials with two different metal elements on the surface of high modulus carbon fiber.The introduction mechanism,morphology and their effects on performance of the bimetallic MOFs were investigated.The results show that the bimetallic MOF material exhibits a certain orientation and spherical shape,which evolves into a loose and porous structure after annealing.This structure significantly improves the surface roughness and interface adhesion of high modulus carbon fiber.The nucleation and growth of bimetallic MOFs depend on the metal reducibility,higher metal reducibility leading to faster growth rates and higher deposition amounts of MOFs.The introduction of bimetallic MOFs reduces the fiber resistivity to 0.05Ω∙•cm,thereby enhancing the conductivity.The unique three-dimensional porous structure also endows the high modulus carbon fiber with excellent thermal stability in high-temperature environments.

关 键 词：碳纤维 金属有机框架 金属离子 导电性 表面粗糙镀 

分 类 号：TQ342.74[化学工程—化纤工业]