抄録
The effects of SiO2 nanoparticle concentration on the mechanical properties of SiO2/silicone nanocomposite sheets prepared from reactive silicone oligomers with methyl- and methoxy- side groups were investigated. It was shown that a transparent and rollable silicone sheet can be prepared at all tested condition where SiO2 concentration was 4.2-8.1 vol%. While a silicone sheet with a tensile strength of 10.3 MPa and Weibul modulus of 6.01 was prepared when the concentration of SiO2 was 6.6%, the tensile strength and Weibul modulus have reduced to 8.23 MPa and 1.63, respectively, when the SiO2 nanoparticle concentration has reduced to 4.2%. It was also shown that the contact angle of the sheet reduced as the SiO2 concentration in the silicone sheet increases. The changes of these macroscopic properties of the SiO2/silicone sheet which were induced by the difference of SiO2 loading content were discussed with the changes of surface structures of SiO2 nanoparticles.
