Cheng Henry Kuo Feng, Sahoo Nanda Gopal, Khin Thanda Hlaing, Li Lin, Chan Siew Hwa, Zhao Jianhong, Juay Yang Kay
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
J Nanosci Nanotechnol. 2010 Aug;10(8):5242-51. doi: 10.1166/jnn.2010.2415.
Multi-walled carbon nanotubes (MWCNTs) were carboxyl-functionalized in order to improve their dispersion in a polymer matrix. The carboxyl-functionalized MWCNTs (i.e., MWCNT-COOH) were added into a blend matrix consisting of polyamide 6 (PA6) and liquid crystalline polymer (LCP) (PA6:LCP = 80:20 in weight) to make ternary composites. The effects of MWCNT-COOH on the rheological, physical, morphological, thermal, mechanical, and electrical properties of the ternary composites have been examined systematically. The dispersion of MWCNTs in the polymer matrix and their interactions with the polymers (i.e., PA6 and LCP) were found to be the most important factors affecting all properties. The functionalization of MWCNTs resulted in the significant improvement in their dispersion in the polymer matrix and largely enhanced the interactions of MWCNTs with the polymer matrix. The functionalized MWCNTs acted not only as reinforcement fillers but also as a compatibilizer that could enhance the interfacial adhesion between PA6 and LCP. Interestingly, the packing density of the polymer matrix was greatly increased by adding MWCNT-COOH.
为了提高多壁碳纳米管（MWCNTs）在聚合物基体中的分散性，对其进行了羧基功能化处理。将羧基功能化的MWCNTs（即MWCNT-COOH）添加到由聚酰胺6（PA6）和液晶聚合物（LCP）组成的共混基体中（PA6:LCP的重量比为80:20），以制备三元复合材料。系统研究了MWCNT-COOH对三元复合材料流变学、物理、形态、热学、力学和电学性能的影响。发现MWCNTs在聚合物基体中的分散及其与聚合物（即PA6和LCP）的相互作用是影响所有性能的最重要因素。MWCNTs的功能化使其在聚合物基体中的分散性显著提高，并大大增强了MWCNTs与聚合物基体的相互作用。功能化的MWCNTs不仅作为增强填料，还作为增容剂，可增强PA6和LCP之间的界面粘附力。有趣的是，添加MWCNT-COOH大大提高了聚合物基体的堆积密度。
