Zhang Hailong, Quan Ling, Xu Lianghua
School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
Key Laboratory of Carbon Fiber and Functional Polymers Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China.
Polymers (Basel). 2017 Aug 2;9(8):332. doi: 10.3390/polym9080332.
Amino-functionalized multi-walled carbon nanotube (amino-CNT)/polyacrylonitrile (PAN) microspheres with diameter of about 300⁻400 nm were prepared by in situ polymerization under aqueous solution. The morphology, crystal structure, and thermal properties of amino-CNTs on a PAN homopolymer were investigated by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectra, X-ray diffraction, and differential scanning calorimetry. The results showed that the amino-CNTs had a significant influence on the morphology of microspheres, and the PAN matrix were grafted onto the surface of amino-CNTs with interfacial bonding between them. The XRD studies showed that the crystal size of amino-CNT/PAN microspheres with lower crystallinity was bigger than in the control PAN homopolymer. The analysis of thermal properties indicated that the amino-CNT/PAN microspheres with lower glass transition temperature had a lower initial temperature and velocity of evolving heat during the exothermic processing as compared with the PAN homopolymer. These results suggested that the incorporation of amino-CNTs into the PAN homopolymer matrix was beneficial for controlling the heat released during the stabilization processing.
通过水溶液中的原位聚合制备了直径约为300⁻400 nm的氨基功能化多壁碳纳米管（氨基-CNT）/聚丙烯腈（PAN）微球。通过扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱、X射线衍射和差示扫描量热法研究了PAN均聚物上氨基-CNT的形态、晶体结构和热性能。结果表明，氨基-CNT对微球的形态有显著影响，PAN基体通过它们之间的界面键合接枝到氨基-CNT的表面。XRD研究表明，结晶度较低的氨基-CNT/PAN微球的晶体尺寸比对照PAN均聚物的大。热性能分析表明，与PAN均聚物相比，玻璃化转变温度较低的氨基-CNT/PAN微球在放热过程中的初始温度和放热速度较低。这些结果表明，将氨基-CNT掺入PAN均聚物基体中有利于控制稳定化过程中释放的热量。
