Silica-g-Poly[2-(N,N-dimethyl amino) ethyl methacrylate] Hybrid Nanospheres as Stabilizer for Metallic Nanocolloids
作者：Bin Liu, Shuxuan Sun, Zhenbo Gao, Guomin Bian, Yonglin Qi, Xinlin Yang* and Chenxi Li
關(guān)鍵字：Silica-g-PDMAEMA hybrid microspheres; Functional polymer brush; Stabilized-metallic nanocolloids.
論文來源：期刊
具體來源：Colloid Surf A 456 (1), 195-202 (2014). DOI: 10.1016/j.colsurfa.2014.05.037
發(fā)表時(shí)間：2014年
The silica-g-poly[2-(N,N-dimethyl amino)ethyl methacrylate] (SiO2-g-PDMAEMA) hybrid microspheres with
polymer brushes were synthesized by the surface-grafted atom transfer radical
polymerization (ATRP) from the surface alkyl bromide functionalized silica nanospheres.
The inorganic nanosphere as surface-initiating polymerization site was prepared
by the amide reaction of 2-bromoisobutyryl bromide with the surface amino group
of silica via modification with (3-aminopropyl) trimethoxysilane (APS). The
grafted PDMEMA brushes stabilized metallic nanocolloids (silver, and palladium)
were prepared by the in-situ reduction of the inorganic salt precursors (AgNO3, and PdCl2)
through the coordination effect of the amino groups to the metallic atom (Au,
Ag). The catalytic properties of PDMAEMA brush-stabilized silver and palladium
metallic nanocolloids were investigated via the reduction of 4-nitrophenol
(4-NP) to 4-aminophenol (4-AnP) by sodium borohydride (NaBH4) as a
model reaction. The resultant hybrid microspheres were characterized by transmission
electron microscopy (TEM), thermal gravimetric analyzer (TGA).