酚醛树脂/混酸处理碳纳米管复合材料的制备与性能

Preparation and Properties of Phenolic/Acid Functionalized Carbon Nanotubes Composites

对碳纳米管进行了酸氧化处理,并对酸氧化处理前后碳纳米管进行了红外光谱和扫描电子显微镜分析。采用溶液聚合法合成了酸氧化碳纳米管改性的酚醛树脂复合材料,并采用红外光谱对其结构进行了表征。结果表明,酸氧化处理后的碳纳米管变疏松了,杂质也被有效地去除,并且在碳纳米管上引入了羧酸基、羟基等基团;复合材料的冲击强度、剪切强度都呈现先增加后降低的趋势,当酸氧化碳纳米管含量为1.5%(质量分数,下同)时,复合材料的冲击强度、剪切强度最大,分别为271kJ/m2、72MPa,比改性前分别提高了41kJ/m2、17MPa。

Carbon nanotubes(CNTs)were treated with acids.FTIR and SEM demonstrated that the acid treatment shortened the CNTs,meanwhile carboxyl and hydroxyl groups were formed on the surface of CNTs.Such CNTs were introduced into a phenolic resin during solution polymerization and the properties of which were compared with those using as-received CNTs.The impact and shear strengths of phenolic resin using modified CNTs increased firstly,and then decreased with increasing CNTs content,with maxima about 271kJ/m2 and 72 MPa,respectively,when the content of CNTs was 1.5wt%.