聚对苯二甲酸乙二醇酯共价接枝多壁碳纳米管及其表征

Surface Covalent Grafting of Multiwalled Carbon Nanotubes with Poly(Ethylene Terephthalate)

通过两步法将聚对苯二甲酸乙二醇酯(PET)分子链共价接枝到多壁碳纳米管(MWCNTs)表面,成功地制备了PET/MWCNTs复合材料。聚丙烯酰氯共价接枝MWCNTs的表面具有多个可反应的酰氯基团,通过与PET端羟基间的反应,以聚丙烯酰氯为中间聚合物层,成功将PET分子链接枝到了碳纳米管表面。采用傅立叶变化红外光谱(FT-IR)、透射电镜(TEM)、核磁(1H-NMR)和热失重分析(TGA)对接枝产物进行了表征,结果表明,PET分子已通过共价接枝的方式接枝到碳纳米管表面,被接枝聚合物的量约为MWCNTs的96%,该接枝聚合物层的存在将有利于多壁碳纳米管与PET树脂间相容性的提高,从而使PET/MWCNTs复合材料的性能得到提高。

The surface covalent grafting of multiwalled carbon nanotubes with poly（ethylene terephthalate） （PET） by poly （acryloyl chloride） interlayer was prepared by two step method. The multiple acryloyl chloride groups generated on the surface of poly（acryloyl chloride） grafted MWCNTs were reacted with the hydroxyl groups of PET molecular chains, and the PET grafted MWCNTs were obtained. The products thus obtained were characterized by Fourier transform infrared （FT-IR） spectroscopy, transmission electron microscopy （TEM）, nuclear magnetic resonance spectroscopy （NMR） and thermogravimetry （TGA）. The results show that the PET molecular chains are covalent grafting onto the surface of MWCNTs, and the total amount of grafted polymer is about 96 %. The polymer layer around the surface of MWCNTs may improve the eompatibilization of PET/MWCNTs composites.