Writer: Wei W u, Manfred H. Wagner, Zhongde Xu
Publication: Colloid &Polymer Science, 2003(281):550-555
Abstract: The effect s of different surface treatments of nano-SiO2 on the microstructure, the particle distribution, interfacial adhesion, and the mechanical properties of PP /nano- SiO2 composite materials were investigated. The mechanism of particle distribution arising from nano- SiO2 surface treatment was analyzed. The results show that, by using only a small amount of nano-SiO2, the strength and the modulus of the composite material can be increased effectively, and increased toughness at room temperature can result. Nano-SiO2was treated by A-1010 liquid phase first, then by PP solution, which acts as a big molecular obstructer layer of PP to assure that the distance between centers of mass is always larger than the vander Waals radius of particles, thus diminishing the tendency of agglomeration of SiO2. This is beneficial to its distribution in PP and to its strong interfacial bonding with the PP matrix. The mechanical properties were superior to those of PP/nano -SiO2 composite materials treated by A-1010 only.
