화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터)
권호 42권 1호
발표분야 고분자구조 및 물성
제목 Phase transition and structure of laponite in dilute polymer solution
초록 Anisotropic disk-shaped laponite structure makes it possible to interact with themselves; negatively charged face interact with positively charged rim that makes colloidal gel or glass. This structural arresting phenomenon called aging is occurred by increasing time and the concentration of the laponite solution. Laponite interaction in poly(ethylene oxide) (PEO) or poly(vinyl alcohol) (PVA) solution is changed by polymer adsorption on laponite clay. This colloid-polymer interaction changes the phase transition concentration of laponite suspension. Here, Light Scattering (LS) and Small Angle X-ray Scattering (SAXS) were performed to probe the influence of polymer in laponite suspension. Scattering data show that when polymer chains are added to the colloidal system, the microstructural changes are found to depend on (i) colloid-polymer size ratio, (ii) laponite and polymer concentration (iii) hydrogen bonding strength.
저자 김정인, 손대원
소속 한양대
키워드 Laponite; Phase transition; PEO
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