纳米尺寸的聚丙烯酸银对体系pH值的响应行为  

The Response of PAA-Ag in Nanometer-size on the pH Value in Reaction System

作　　者：郑雪琳[1] 翁家宝[1] 颜志森[2] 刘成峰[1] 孙萃玉[1] 

机构地区：[1]福建师范大学化学与材料学院,福建福州350007 [2]韶关学院学报编辑部,广东韶关512005

出　　处：《韶关学院学报》2003年第3期93-98,共6页Journal of Shaoguan University

基　　金：福建省自然科学基金资助项目 (B970 10 )

摘　　要：以低分子量聚丙烯酸 (PAA)和硝酸银为主要原料 ,通过控制体系的pH值合成聚丙烯酸银纳米微球和纳米柱状物 .实验结果表明 ,PAA -Ag在该体系中 ,具有较好的分散性 .通过TEM观察 ,pH =2 0时产物为纳米柱状物 ,尺寸为 15 0nm× 4 5nm ;pH =3 1时为纳米微球 ,直径为 2 5nm .用IR、UV -Vis、荧光和电导率法研究了Ag与PAA间的配位作用、配位聚合物的组成和结构 ,确认了Ag与PAA分子间以配位键相结合形成Ag -PAA配聚物 ,配聚物的配位单元由 2个Ag与 2个PAA单体单元的羧基 (—COO)Silver(Ⅰ)complex of polyacrylic acid in nanometer size particle/and column were synthesized by controlling the system pH value with low molecular PAA and AgNO 3.TEM reveals that the complex possesses good dispersibility in the system and the statue varies reversibility with the pH value,150 nm×45 nm microcolumn for pH=2 0 and about 25 nm microsphere for pH=3 1.The complex was characterized by FT-IR,UV-Vis and electrical conductivity method.The results confirm that the coordinated building-units are constructed by two Ag(Ⅰ)ions and two carboxylate groups from acrylic acid in bridging bidentate fashion.

关 键 词：银 聚丙烯酸 纳米材料 配合物 

分 类 号：O643.2[理学—物理化学]