Gu Shunchao, Onishi Junya, Mine Eiichi, Kobayashi Yoshio, Konno Mikio
Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, Aoba, Aramaki-aza, Aoba-ku, Sendai 980-8579, Japan.
J Colloid Interface Sci. 2004 Nov 1;279(1):284-7. doi: 10.1016/j.jcis.2004.06.065.
A preparation method for multilayered gold-silica-polystyrene core-shell composite particles is proposed. The gold-silica core-shell particles of 192-nm-sized, synthesized by coating the 18-nm-sized gold particles with silica by a seeded growth technique, were used as cores for succeeding polystyrene coating. After surface modification of gold-silica composite particles by methacryloxypropyltrimethoxysilane (MPTMS), polymerizations of styrene (0.16-0.4 M) were conducted with 8 x 10(-3) M of potassium persulfate initiator in the presence of 1 x 10(-3) M of sodium p-styrenesulfonate anionic monomer. Multilayered core-shell gold-silica-polystyrene particles that contained a single core could be obtained. The coefficient of variation of size distribution (CV) of the composite particles was less than 7%, and polystyrene shell thickness was in a range of 193 to 281 nm.
提出了一种多层金-二氧化硅-聚苯乙烯核壳复合粒子的制备方法。通过种子生长技术用二氧化硅包覆18纳米大小的金粒子合成的192纳米大小的金-二氧化硅核壳粒子，用作后续聚苯乙烯包覆的核。在用甲基丙烯酰氧基丙基三甲氧基硅烷（MPTMS）对金-二氧化硅复合粒子进行表面改性后，在1×10⁻³M对苯乙烯磺酸钠阴离子单体存在下，用8×10⁻³M过硫酸钾引发剂进行苯乙烯（0.16 - 0.4M）的聚合反应。可以得到含有单个核的多层核壳金-二氧化硅-聚苯乙烯粒子。复合粒子尺寸分布的变异系数（CV）小于7%，聚苯乙烯壳厚度在193至281纳米范围内。
