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Language: korean

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received April 9, 2010
Accepted April 29, 2010

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Colloidal Silica를 이용한 Silylated Waterborne Polyurethane/Silica Nanocomposite의 제조

Preparation of Silylated Waterborne Polyurethane/Silica Nanocomposites Using Colloidal Silica

홍민기 신용탁 최진주 이원기¹ 이경배¹ 유병원¹ 이명구² 송기창^†

Min Gi Hong Yong Tak Shin Jin Joo Choi Won Ki Lee¹ Gyoung Bae Lee¹ Byung Won Yoo¹ Myung Goo Lee² Ki Chang Song^†

건양대학교 화공생명학과, 320-711 충남 논산시 내동 26 ¹한진화학주식회사 기술연구소, 437-801 경기도 의왕시 고천동 333 ²나노스피어(주) 95-3 Jongsongri, Sonsanmyeon, Hwaseong, Gyeonggi, Korea, 경기도 화성시 송산면 중송리 95-3

Department of Chemical and Biochemical Engineering, Konyang University, 26 Nae-dong, Nonsan, Chungnam 320-711, Korea ¹Technical Research Institute, Hanjin Chemical Co., LTD, 333 Gocheon-dong, Uiwang, Gyeonggi 437-801, Korea ²Nanosphere Co., LTD, Korea

Korean Chemical Engineering Research, October 2010, 48(5), 561-567(7), NONE Epub 14 November 2011

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Abstract

Isophrone diisocyanate, poly(tetramethylene glycol)과 dimethylol propionic acid로부터 제조된, polyurethane 부분중 합체의 미반응 NCO기를 aminopropyl triethoxysilane으로 capping시켜 silylated waterborne polyurethane을 합성하였다. 연이어 이것을 colloidal silica와 혼합하여 silylated waterborne polyurethane/silica nanocomposite를 제조하였다. 동적 빛 산란법에 의해 측정된 nanocomposite 입자의 평균 크기는 silica 함유량과 무관하게 거의 일정한 수치를 나타내었다. 그러나 제조된 nanocomposite의 열적안정성은 순수한 waterborne polyurethane보다 우수하였다.

Silylated waterborne polyurethane was synthesized by capping the NCO groups of polyurethane prepolymer, prepared from isophrone diisocyanate, poly(tetramethylene glycol) and dimethylol propionic acid, with aminopropyl triethoxysilane. Subsequently, it was mixed with colloidal silica to prepare silylated waterborne polyurethane/silica nanocomposites. The average sizes of nanocomposite particles, measured by dynamic light scattering, showed almost the same value, irrespective of increasing silica content. However, the prepared nanocomposites showed better thermal stability than pure waterborne polyurethane.

Keywords

Silylated Waterborne Polyurethane Aminopropyl Triethoxysilane Colloidal Silica Nanocomposite

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