期刊論文

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
ISSN 1876-1070
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