フェノール樹脂/シリカ系ナノコンポジットのモルフォロジーと材料特性

抄録

Very uniform nanocomposite materials (PHS-NCs) were prepared by in-situ polymerization of silicon alkoxide in a phenolic resin matrix. The transparency and morphology of the PHS-NCs could be varied by controlling the resulting silica size. SEM and TEM observations reveal that the PHS-NC shows a distinct fine morpholgy which is very different from that of conventional phenolic resin/silica glass composite. The PHS-NC exhibits excellent mechanical improvements in modulus, strength, strain at break and impact strength. It was found that the PHS-NC did not show noticeable hysteresis nor acoustic emission before the fracture in the flexural test, which is different from that of the conventional glass fiber reinforced composite. The PHS-NC also exhibit high surface hardness and smooth fracture surface. Furthermore, the tribological properties such as friction and wear characteristics are improved in the PHS-NC by incorporation of in-situ polymerized silica in phenolic resin matrix.