Kim Kyung-Min, Kim Hoon, Kim Hyun-Joong
Laboratory of Adhesion & Bio-Composites, Department of Agriculture, Forestry and Bioresources, Seoul National University, Seoul 08826, Korea.
Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea.
Polymers (Basel). 2021 Aug 12;13(16):2691. doi: 10.3390/polym13162691.
The objectives of this study are to improve the thermal and mechanical properties of epoxy/fumed silica composite with different surface treatments of fumed silica. The addition of silica nanoparticles improved the thermal stability of the composite and slowed down the pyrolysis process. The crosslinking density and T of the epoxy/fumed silica composites increased because of the interfacial interaction between the PDMS-treated fumed silica particles and the epoxy matrix. The flexural strength of the epoxy nanocomposite was very high even at a low silica content because of the strong interactions between the PDMS-treated fillers and the epoxy matrix. These strong interfacial interactions originate from the attractive forces between the polymer and the filler. Therefore, the polymer nanocomposite containing the PDMS-treated fumed silica is shown to be sufficiently commercially promising.
本研究的目的是通过对气相二氧化硅进行不同的表面处理，来改善环氧/气相二氧化硅复合材料的热性能和力学性能。二氧化硅纳米颗粒的加入提高了复合材料的热稳定性，并减缓了热解过程。由于聚二甲基硅氧烷（PDMS）处理的气相二氧化硅颗粒与环氧基体之间的界面相互作用，环氧/气相二氧化硅复合材料的交联密度和玻璃化转变温度（T）有所提高。由于PDMS处理的填料与环氧基体之间的强相互作用，即使在二氧化硅含量较低时，环氧纳米复合材料的弯曲强度也非常高。这些强界面相互作用源于聚合物与填料之间的吸引力。因此，含有PDMS处理的气相二氧化硅的聚合物纳米复合材料具有足够的商业前景。
