高分子网络凝胶法制备纳米α-Fe_2O_3粉体  

Preparation of Nanometer-sized α-Fe_2O_3 by Polyacrylamide Gel Method

作　　者：陈雪冰[1] 邵忠宝[1] 杨雪[1] 

机构地区：[1]东北大学化学系,辽宁沈阳110004

出　　处：《化学与生物工程》2005年第12期34-36,共3页Chemistry & Bioengineering

摘　　要：以丙烯酰胺为聚合单体,N,N′-亚甲基双丙烯酰胺为网络剂,用高分子网络凝胶法在低温下制备了α-Fe2O3纳米粉体.用XRD、TEM等对所制备的α-Fe2O3纳米粉体进行了表征,考察了制备条件对产物平均粒径、形貌的影响.结果表明:利用丙烯酰胺自由基聚合反应,同时利用网络剂有两个活化双键的双功能团效应,将高分子链联结起来而获得的凝胶具有极小且均匀的网络,限制了α-Fe2O3晶粒之间的团聚,制备出了平均粒径在25～40 nm之间的均分散球形α-Fe2O3纳米粒子;干凝胶分解温度、单体与网络剂质量配比、烧结温度和烧结时间均对粉体的形貌﹑团聚状态和平均粒径大小有一定的影响.The acrylamide and N, N＇-methylenediacrylamide were used to make a polyacrylamide gel from an aqueous solution of iron nitrate. The characterization of powders of nanometer-sized α-Fe2O3 was studied by XRD and TEM. The experimental results showed that because of polyacrylamide network the particle of α-Fe2O3 crystalline was global,the average particle diameter size of nanometer-sized α-Fe2O3 was about 25 to 40 nm,and the temperature calcined and the time calcined of dry gel,the ratio of acrylamide and N, N＇-methyl- enediacrylamide had a certain effect on the appearance and size of nanometer-sized α-Fe2O3.

关 键 词：纳米粉体 Α-FE2O3 高分子凝胶 平均粒径 

分 类 号：O614[理学—无机化学]