PS-b-PAA模板制备金纳米颗粒  

PREPARATION OF GOLD NANOPARTILCES WITH POLY(STYRENE)-b-POLY(ACRYLIC ACID)

作　　者：王勇[1] 彭英春[1] 姬相玲[1] 姜炳政[1] 

机构地区：[1]高分子化学与物理国家重点实验室中国科学院长春应用化学研究所,吉林长春130022

出　　处：《高分子材料科学与工程》2004年第2期195-197,共3页Polymer Materials Science & Engineering

基　　金：国家自然科学基金委专项基金(20023003)

摘　　要：以两亲性嵌段共聚物苯乙烯-丙烯酸两嵌段共聚物(PS-b-PAA)在选择性溶剂甲苯中形成的胶束为模板,制得了尺寸均匀的金纳米颗粒,使用透射电镜和紫外吸收光谱对制得的纳米颗粒进行了表征。实验发现PS-b-PAA羧酸基团与HAuCl4有弱的相互作用;改变HAuCl4与羧酸基团的摩尔比可以得到不同尺寸的纳米颗粒;当体系中HAuCl4与羧酸基团摩尔比大于0.3时,过量的HAuCl4不能进入胶束核内,而是在溶剂中析出,纳米颗粒尺寸也不再随之增大。Amphiphilic diblock copolymer poly (styrene)-block-poly (acrylic acid) associated to form micelles in toluene and the solution was employed as a template to prepare gold nanoparticles. Nanoparticles of narrow size distributions were obtained and characterized with TEM and UV-Vis absorption spectra. It was found that changing the mole ration of HAuCl_4 to acrylic acid monomer could control the size of the particles. Because of the weak interaction between acid radical and inorganic salt, the excessive HAuCl_4 could not enter the core of the micelles and the size of the nanoparticles could not increase further when the ratio of HAuCl_4 to acrylic acid was higher than (0.3).

关 键 词：苯乙烯-丙烯酸两嵌段共聚物 PS-b-PAA模板 金纳米颗粒 胶束 甲苯 透射电镜 紫外吸收光谱 

分 类 号：TB383[一般工业技术—材料科学与工程]