Korean Chemical Engineering Research, Vol.55, No.2, 247-252, April, 2017
아미노실란과 콜로이드 실리카를 이용한 친수성 코팅 도막의 제조
Preparation of Hydrophilic Coating Films by using of Aminosilane and Colloidal Silica
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초록
실란커플링제인 아미노실란을 15~20 nm의 직경을 갖는 콜로이드 실리카와 반응시킴에 의해 친수성 코팅 용액을 제조하였다. 또한 친수성 코팅 용액을 폴리카보네이트 기재 위에 담금 코팅 시킨 후 120 °C에서 열경화 시킴에 의해 친수성 코팅 도막이 제조되었다. 이 과정 중 아미노실란의 종류 변화가 코팅 도막의 물성에 미치는 영향을 연구하였다. 그 결과 아미노실란으로서 3-aminopropyltriethoxysilane (APTES)을 사용하여 제조된 코팅 도막은 25~44°의 접촉각과 B의 좋지 못한 연필경도를 나타내었다. 반면에 아미노실란으로서 3-aminopropyltrimethoxysilane (APTMS)을 사용하여 제조된 코팅 도막은 26~37°의 접촉각과 2H의 우수한 연필경도를 나타내었다.
Hydrophilic coating solutions were prepared by reacting a silane coupling agent, aminosilane with colloidal silica (15~20 nm in diameter). Hydrophilic coating films were also obtained by depositing the hydrophilic coating solutions on polycarbonate substrates by dip-coating and subsequently by thermal curing at 120 °C. During this process, the effect of types of aminosilane was studied on the properties of coating films. As a result, coating films, prepared with 3-aminopropyltriethoxysilane (APTES) as aminosilane, showed contact angles of 25~44° and a poor pencil hardness of B. On the other hand, coating films, prepared with 3-aminopropyltrimethoxysilane (APTMS) as aminosilane, exhibited contact angles of 26~37° and a good pencil hardness of 2H.
Keywords:Hydrophilic coating solutions;Colloidal Silica;3-Aminopropyltriethoxysilane;3-Aminopropyltrimethoxysilane;Hydrophilic coating films;Pencil hardness
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