Journal Textile Coloration and Finishing Year / Vol., Issue, Month 2015 / V.27,no.2,Jun Title Fabrication of Silica-Containing Breathable Waterproof Polyurethane Dispersion Film Authors Hyun-Ki Shin, Man-Woo Huh1 and Nam-Sik Yoon† Institution/Affiliations Kyungpook National University, Kyungil University Pages/Total page pp.126 ~ 131 / 6 Language Korean Abstract Abstract: Silica-polyurethane hybrid breathable films were prepared and their breathabilities were assessed. Appropriately aggregated silica was prepared through sol-gel reaction of water glass and its particle size ranged 360∼500nm. The polyurethane dispersion was prepared by the reaction of isophorone diisocyanate(IPDI) as diisocyanate and polytetramethylene glycol(PTMG) and dimethylol propionic acid(DMPA) as polyol, particle size ranging 30∼120nm. The reaction between isocyanate and hydroxyl group to form urethane bonding was checked by the intensity of the stretch peak of isocyanate at 2270cm-1 in the FT-IR. The silica was incorporated into polyurethane dispersion and casted into film. It was shown that the incorporated silica(1∼5wt.%) increased water vapour permeability of the films by 30∼100%, and decreased the hydrostatic pressure by 10∼40%. From the results, it could be concluded that the appropriate hybridization of silica can increase the breathability of polyurethane dispersion film, while minimizing the loss of hydrostatic pressure. Keywords Keywords: breathable, polyurethane, silica, hybrid membrane, water vapor premeability, hydrostatic pressure Download   Reference http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2015_v27n2_126&ordernum=4