수용성 블록공중합물에서 산화티탄 분말의 흡착 안정화

• 영문명: Adsorption Stabilization of TiO₂ Particles in Water Soluble Block Copolymers
• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: 권순일(Soun Il Kwan) 정환경(Hwan Kyeong Jeong) 최성옥(Seung Ok Choi) 남기대(Ki Dae Nam)
• 간행물 정보: 『한국응용과학기술학회지』한국유화학회지 제18권 제2호, 118~126쪽, 전체 9쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2001.06.30

영문 초록

Micelle formation and adsorption at the TiO₂ interface of a series of polystyrene-polythylene oxide(PS-PEO) block copolymer in aqueous solution was studied using fluorescence probing and small-angle X-ray methods. Further, the stability of aqueous TiO₂ dispersion in the presence of copolymer was investigated by microelectrophoresis, optical density and sedimentation measurements. The dissolution of pyrene as fluorescent probe in aqueous surfactant solution leads to a slow decrease of the I₁/I₃ ratio, as the copolymer concentration increase; I₁ and I₃ are respectively the intensities of the first and third vibrionic peaks in the pyrene fluorescence emission. The behaviour was due to the characteristics of the copolymers and/or to the copolymer association efficiency in water. Moreover, the adsorption at the plateau level increases with decreasing PEO until chain length. The zeta potential of TiO₂ particles decreases with increasing copolymer concentration and reaches a plateau value. Finally, stabilization using block copolymers was more effective with samples having higher weight fractions of PS block.

목차

Abstract

1. 서론

2. 실험

3. 결과 및 고찰

4. 결론

참고문헌

키워드

micelle formation block copolymer adsorption stabilization