出版日期：2016-12-01 00:00:00

著者：Chao-Ching Chang; Jo-Hui Lin; Liao-Ping Cheng

著錄名稱、卷期、頁數：Journal of applied science and engineering 19(4), p.401-408

摘要：Solvent dispersible nano-silica powder was prepared by a dual-step sol-gel process: first, SiO_2nanoparticles were synthesized through acid-catalyzed hydrolysis and condensation of tetraethyl orthosilicate in 2-propanol aqueous solution. Then, the particles were surface-modified by means of the capping agent trimethylethoxysilane (TMES). The formed product, termed TSiO_2 nanopowder, was dispersible in many organic solvents, and the dispersibility was found to depend on the amounts of TMES bounded to the SiO_2 nanoparticles. FTIR spectra of TSiO_2 samples confirm Si-O-Si linkage being formed between TMES and SiO_2 through the capping reaction. The sizes of TSiO_2 dispersed in various solvents, as determined by dynamic light scattering (DLS), fell largely over the range 2-20 nm for solvents with solubility parameters of 16-29.6 MPa^(1/2). TEM imaging of the nanoparticles indicated that they were well separated with the largest identifiable size of ~10 nm, agreeing with the results obtained from DLS.

關鍵字：Nanoparticles;Dispersible;Sol-gel;Silica

語言：en

期刊性質：國外

收錄於：EI

審稿制度：否

國別：TWN

出版型式：紙本