羟基化SBS嵌段聚合物模板制备银纳米粒子

Preparation of silver nanoparticles using hydroxylated SBS block copolymer as template

针对嵌段聚合物合成过程复杂且成本高的问题,以国产SBS(苯乙烯丁二烯苯乙烯嵌段聚合物)为基本原料,通过大分子化学反应,制备得到了羟基化SBS.以羟基化SBS为模板,N,N二甲基甲酰胺(DMF)为溶剂,硝酸银为原料,在一定反应条件下制备得到了银纳米粒子.采用紫外可见吸收光谱及透射电子显微镜对银纳米粒子的尺寸和形貌进行了表征.研究结果表明:所合成的银纳米粒子可以产生纳米银所具有的表面等离子态的特征吸收峰,羟基化SBS可以为银纳米粒子的成核及晶体长大起到较好的模板作用,实验过程中所得到的银纳米粒子具有球状形貌特征,且具有较窄的尺寸分布.

Aiming at the high cost and complicated process for synthesizing block copolymers, the hydroxylated SBS （styrene-b-butadiene-b-stryene） was synthesized using home-made SBS through the macromolecular reaction route. The silver nanoparticles were prepared using the hydroxylated SBS （SBS-OH） as template, DMF （N, N-dimethylformamide） as solvent and AgNO3 as raw material under certain reaction conditions. The size and morphology of the silver nanoparticles were characterized using ultraviolet-visible absorption spectra and transmission electron microscope. The results show that the synthesized silver nanoparticles can offer the surface plasma characteristic absorption peaks possessed by nano-silver. The SBS-OH can act as a better template for the nucleation and growth of silver nanoparticles. And the synthesized silver nanoparticles have the spherical morphology and narrow size distribution.