重氮盐电化学还原接枝法制备碳纳米管/碳纤维杂化增强体  

Anchoring carbon nanotubes onto carbon fibers via electrochemical reduction of diazonium salts

作　　者：刘玉婷[1,2] 吴刚平[1] 吕春祥[1] 

机构地区：[1]碳纤维制备技术国家工程实验室,中国科学院山西煤炭化学研究所,太原030001 [2]中国科学院大学,北京100049

出　　处：《化工新型材料》2015年第5期25-27,37,共4页New Chemical Materials

基　　金：国家自然科学基金(51002165);山西省自然科学基金(2010011033-3);中国科学院山西煤炭化学研究所杰出青年人才培养计划(2011SJCRC09)

摘　　要：为改善碳纤维/环氧树脂复合材料界面性能,采用重氮化电接枝法制备碳纳米管/碳纤维杂化增强体。首先采用混酸处理碳纳米管,得到微纳米级长度、端帽切除、具有更多悬挂键和活性反应位点的碳纳米管;再以重氮盐的非质子溶剂溶液为电解液,通过重氮盐电化学接枝将处理的碳纳米管均匀接枝到碳纤维表面,成功制备了碳纳米管/碳纤维杂化增强体。所制备增强体与环氧树脂的浸润性明显改善,有望改善界面载荷传递性能,提高复合材料界面剪切强度。A novel strategy involving electrochemical reduction of diazonium salts to attach carbon nanotubes （CNTs） on carbon fibers （CFs） was suggested. The CNTs were treated in mixed acid to shorten the length, to cut the end caps, and to afford more dangling bonds and active reaction sites. The hybridized CNT/CF reinforcements were achieved via stepwise electrochemical grafting of diazonium salts in aprotic solvents. The hybridized reinforcements possessed signif- icant decrease in contact angles, which was potentially contributed to a better stress dissipation, and to a better CF/epoxy resin interfaces.

关 键 词：碳纤维 碳纳米管 电化学接枝 浸润性 界面 

分 类 号：TQ327.3[化学工程—合成树脂塑料工业] TB332[一般工业技术—材料科学与工程]