College of Material, Chemistry and Chemical Engineering , Hangzhou Normal University , No. 16 Xuelin Rd. , Hangzhou 310036 , People's Republic of China.
ACS Appl Mater Interfaces. 2018 Mar 14;10(10):8411-8416. doi: 10.1021/acsami.8b01704. Epub 2018 Mar 2.
Physically anchoring carbon nanotubes (CNTs) onto the interface of immiscible polymer blends has been extensively reported; however, enhancement of physical properties of the blends has seldom been achieved. Herein, we used CNTs with reactive epoxide groups and long poly(methyl methacrylate) (PMMA) tails as a thermodynamic compatibilizer for immiscible poly vinylidene fluoride/poly l-lactide (PVDF/PLLA) blends. The CNTs acted as an efficient compatibilizer and bridged the two phases through physical entanglement and chemical reaction. The sea-island structure of the blend transformed into a bicontinuous structure for CNT contents greater than 3 wt %. The mechanical properties, including ductility and tensile strength, thermal properties, and electrical conductivities were all enhanced by the CNTs compatibilizer. This strategy thermodynamically compatibilized by reactive nanofillers paves the way for advanced blend nanocomposites.
将碳纳米管 (CNTs) 物理锚定在不混溶的聚合物共混物的界面上已经有广泛的报道；然而，共混物的物理性能的增强很少被实现。在此，我们使用具有反应性环氧基团和长聚甲基丙烯酸甲酯 (PMMA) 尾的 CNTs 作为不混溶的聚偏二氟乙烯/聚 L-乳酸 (PVDF/PLLA) 共混物的热力学增容剂。CNTs 作为一种有效的增容剂，通过物理缠结和化学反应桥接两相。当 CNT 含量大于 3wt%时，共混物的海-岛结构转变为双连续结构。力学性能，包括延展性和拉伸强度、热性能和电导率都通过 CNTs 增容剂得到了增强。这种通过反应性纳米填料热力学增容的策略为先进的共混纳米复合材料铺平了道路。
