羟基化碳纳米管/聚己内酯复合材料的结构和力学性能!  

Structure and mechanical properties of polycaprolactone-based materials modified by hydroxyl-functionalized carbon nanotubes

作　　者：谢剑宏 惠忠英[2] 吴渺 

机构地区：[1]武汉三江航天固德生物科技有限公司,湖北武汉430040 [2]武汉理工大学化学工程学院,湖北武汉430070

出　　处：《湖北大学学报（自然科学版）》2012年第4期491-495,共5页Journal of Hubei University：Natural Science

摘　　要：将羟基化多壁碳纳米管在超声波作用下均匀分散于己内酯单体中,通过原位微波辅助开环聚合的方法制备了聚己内酯/羟基化多壁碳纳米管复合材料.羟基化多壁碳纳米管的引入明显提高了聚己内酯材料的强度和模量,但是断裂伸长率却随着羟基化多壁碳纳米管含量的增加而持续降低.羟基化多壁碳纳米管的质量分数为0.5%时,纳米复合材料的拉伸强度和杨氏模量可提高至纯聚己内酯材料的2倍.利用扫描电镜、X线衍射、红外光谱和示差扫描量热分析揭示了纳米复合材料断裂形貌、结晶情况和热性质,进而探讨了羟基化多壁碳纳米管对提高力学性能的作用机制.The hydroxyl-functionalized multi-walled carbon nanotubes(MWCNT-OH)were homogeneously dispersed in the ε-caprolactone(CL) monomer by ultrasonic treatment.Subsequently,the nanocomposites based MWCNT-OH and polycaprolactone(PCL) was prepared by in-situ polymerization under microwave radiation.Meanwhile,the addition of MWCNT-OH resulted in the simultaneous enhancement of strength and Young's modulus,however,it is pitiful that the elongation at break of the nanocomposites continuously decreased with an increase of the MWCNT-OH content.When the content of MWCNT-OH was 0.5%,the tensile strength and Young's modulus were two times than those of neat PCL.Furthermore,the fractured structure,crystalline behavior and thermal properties of the as-prepared nanocomposites were investigated by scanning electron microscope,X-ray diffraction,infrared spectroscopy,and differential scanning calorimetry,respectively,and hence the mechanism of MWCNT-OH on enhancing mechanical performances was discussed.

关 键 词：碳纳米管 聚己内酯 纳米复合材料 力学性能 

分 类 号：TB3[一般工业技术—材料科学与工程]