酚醛树脂/混酸处理碳纳米管复合材料的制备与性能

本文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和扫描电镜分析，发现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。采用溶液聚合法合成了酸氧化碳纳米管改性的酚醛树脂，采用FT-IR对树脂结构进行了表征，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 wt.%时，复合材料的冲击强度、剪切强度最大，分别为271KJ•m-2、72MPa，比改性前分别提高了41KJ•m-2、17MPa。

Preparation and Properties of Acid Functionalized Carbon Nanotubes/Phenolic Composites

Carbon nanotubes (CNTs) were functionalized by acid. CNTs treated with or without acid treatment were tested by FT-IR and SEM, which was demonstrated that the acid treatment shorten the CNTs, the impurities were removed from the CNTs, and several groups such carboxyl groups and hydroxy groups were inserted in CNTs. Phenolic resin modified by acid CNTs was synthetized by the solution polymerization and as-received products were then analyzed by FT-IR. The impact strength and shear strength of phenolic resin modified by acid CNTs presented the trend which was increased firstly, and then decreased with CNTs content increased. Their corresponding maximums were about 271kJ•m-2、72MPa, and increased 41kJ•m-2、17MPa respectively when the content of CNTs was 1.5 wt%.