教師資料查詢 | 類別: 期刊論文 | 教師: 賴偉淇 Lai,Wei-chi (瀏覽個人網頁)

標題:Size-tunable silica nanowires prepared using reverse microemulsion-gel systems
學年107
學期2
出版(發表)日期2019/06/01
作品名稱Size-tunable silica nanowires prepared using reverse microemulsion-gel systems
作品名稱(其他語言)
著者Wei-Chi Lai; Li-tzuen Hong; Chi-Yuan Hsueh
單位
出版者
著錄名稱、卷期、頁數Journal of the Taiwan Institute of Chemical Engineers 99, p.207-214
摘要Self-assembled hybrid gels were formed by adding amounts of tetraethyl orthosilicate (TEOS) dissolved in water to organic solutions of sodium bis(2-ethylhexyl) sulfosuccinate (Aerosol-OT, AOT). Two kinds of hybrid gels were prepared and discussed in this study. In the first, gels were prepared through chemical hydrolysis-condensation reactions of TEOS. The growth of a one-dimensional silica network in the confinement of the AOT reverse microemulsions led to gel formation. In the other, gels were prepared through reverse hexagonal mesophases due to high concentrations of AOT. Rheological studies demonstrated that the elastic modulus, G', is greater than the viscous modulus, G", at all frequencies, and G' did not depend upon the frequency in either system, implying they can be used as gels. The gels obtained through silica networks had smaller G' values and higher transformation strains than those gels prepared through AOT reverse hexagonal mesophases. Small-angle X-ray scattering (SAXS) results showed that both systems exhibited cylindrical structures with short-range order, and the radii of the cylinders were significantly influenced by the change of AOT, TEOS and water concentrations. Transmission electron microscopy (TEM) confirmed that silica nanowires were found in both gel systems after removing the AOT components. The length of the nanowires for the gels prepared through silica networks was larger than that for the gels prepared through AOT reverse hexagonal mesophases. This was because the silica grew into a one-dimensional network (axial direction) due to the confinement of the cylindrical structures.
關鍵字Self-assembled;Gel;Microemulsion;Silica;Nanowire
語言英文
ISSN1876-1070
期刊性質國外
收錄於SCI;EI;
產學合作
通訊作者
審稿制度
國別荷蘭
公開徵稿
出版型式,電子版
相關連結
Google+ 推薦功能,讓全世界都能看到您的推薦!