超支化聚合物修饰碳纳米管的研究进展

碳纳米管( CNTs)具有极高的杨氏模量、硬度和韧性、良好的导电性和导热性,但由于其分散性差,限制了其应用范围.超支化聚合物( HBP)具有低粘度、高流变性和良好的溶解性,特别是末端含有大量的活性官能团.用HBP修饰CNTs,不仅可以提高CNTs在聚合物基体中的分散性,改善CNTs与基体之间的相容性和界面粘接性能,还可以赋予CNTs新的功能.因此,综述了超支化聚合物改性CNTs的方法,包括直接改性法,表面引发聚合法等方法,并指出了每种改性方法的优缺点及其发展前景.

Research Progress of Carbon Nanotubes Modified by Hyperbranched Polymer

Although carbon nanotubes(CNTs) have many good properties,such as high Young modulus,hardness and toughness,good electrical conductivity and thermal conductivity,its poor dispersibility have imposed great limitations to its applications and development.Hyperbranched polymer(HBP) has low viscosity,high rheological behaviour and good solubility,especially its terminal end with lots of active functional groups.So CNTs modified by HBP can not only improve dispersibility of CNTs,enhance the compatibility and interface adhesion between polymer matrix and CNTs,but also endow CNTs with new properties.So in this article,methods of hyperbranched-polymer-modified CNTs are summarized,including direct modification and surface-initiated polymerization and so on.The merit and demerit of each method and its prospects in the future are also pointed out.