摘要
在紫外辐照法制备Au 聚丙烯酰胺 (PAM)纳米复合物过程中 ,HAuCl4的光还原和丙烯酰胺 (AM)单体的聚合反应同步进行 ,使得生成的胶态Au纳米粒子均匀分散在聚丙烯酰胺基质中 .实验发现金纳米的生成过程可促进AM聚合反应的进行 ,而PAM的生成则可有效地阻止初始形成的Au纳米粒子发生团聚 ,从而控制纳米复合物中Au纳米粒子粒径明显小于同样条件下没有AM存在时得到的Au纳米粒子粒径 .进一步实验还表明 ,在紫外辐照法制备Au PAM纳米复合物过程中的Au纳米粒子形成较快 ,且粒径大小不随紫外辐照时间而发生变化 ,仅受HAuCl4初始浓度的影响 .该方法可广泛应用于各类金属 有机聚合物纳米复合材料的制备 .
The Au Polyacrylamide(PAM) nanocomposites with gold nanoparticles well homogeneously dispersed in the polymer matrix have been prepared via a convenient ultraviolet irradiation technique at room temperature. The mechanism is based on the simultaneous occurrence of photo reduction of HAuCl 4 and the polymerization of acrylamide monomer. It was found that the formation of colloid Au particles was favorable for the polymerization of acrylamide monomer while the polymerization of acrylamide could efficiently protect the growth and aggregation of colloidal Au particles. Further study indicates that the size of Au nanoparticles of Au PAM did not increase according to the UV irradiation time but was affected by the prime concentration of HAuCl 4.This method may find a wide application in the to preparation of other metal polymer nanocomposites.
基金
国家自然科学基金! (5 95 72 0 31
19772 0 49)资助项目
