摘要
通过用ＮａＯＨ预处理剑麻纤维，再浸泡ＺｎＣｌ＿２溶液，然后在Ｎ＿２保护下热处理，制备出较高纤维得率和Ａｇ￣＋还原吸附能力的活性碳纤维（ＺＣＳＡＣＦ）。借助于ＩＲ，ＴＧ，ＷＡＸＤ，元素分析和比表面积测定，研究了纤维的碳化—活化机理。实验结果表明：纤维在低温区脱水的同时形成醛、酮基团和Ｃ＝Ｃ结构。当温度升到２５０℃以上时，纤维表面开始形成大量的微孔。提高ＺｎＣｌ＿２溶液的浸泡浓度可显著增加ＺＣＳＡＣＦ的表面积。当温度升至５５０℃时，纤维开始芳构化。
Activated carbon fiber ZCSACF with higher reductive absorption of Ag￣+ were prepared in high yields by heat-ing sisal fibers pretreated with NaOH and immersed in ZnCl_2 solution in a flow of N_2. The carbonizing-activat-ing process of the fiber in this case was studied by means of IR,TG,WAXD,elemental analysis and specificsurface area determination.The results showed that the fiber eliminated H_O and formed aldehyde,ketonegroups and C=C bond.A great deal of micropores were formed in the fiber when heated to higher tempera-ture than 250℃. The specific surface area can be increased significantly by increasing the immersing concen-tration of ZnCl_2 solution,When the temperature raised to 550℃,the aromatization of fiber began to takeplace.
出处
《合成纤维工业》
CAS
CSCD
1995年第4期31-36,共6页
China Synthetic Fiber Industry
基金
国家自然科学基金
国家教委博士点基金
广东省自然科学基金
关键词
活性碳纤维
碳化-活化机理
剑麻纤维
碳纤维
activated carbon fiber
carbonizing-activating mechanism
ZnCl_2
sisal fiber
