摘要
采用浸渍磷酸氢二铵及化学活化法制备了3种木棉基活性炭纤维,其中AK-1没有经过预氧化处理,AK-2先浸渍再经预氧化处理,AK-3先经预氧化处理再浸渍;表征了3种活性炭纤维的表面物理化学结构及吸附性能。结果表明:3种活性炭纤维的平均孔径均约为2nm;预氧化处理提高了纤维的比表面积和纤维表面的含氧基团含量。AK-1具有最大的苯酚吸附量为65.8mg/g;AK-3具有最大的亚甲基蓝吸附量为156.7mg/g;AK-2具有最大的比表面积为1518m2/g和最多的表面含氧基团,对苯酚和亚甲基蓝的吸附量均不高,说明表面含氧基团降低了纤维对苯酚和亚甲基蓝的吸附量。吸附动力学研究表明,木棉基活性炭纤维吸附苯酚和亚甲基蓝符合拟二级动力学方程。
Three kinds of activated carbon fiber were prepared by immersing diammonium hydrogen phosphate via chemical activation method, in which AK-1 was not exposed to preoxidization, AK-2 to immersion prior to preoxidization, and AK-3 to preoxidization prior to immersion. The surface physico-chemical structure and adsorptive property of these three kinds of activated carbon fiber were characterized. The results showed that the average pore size of these three kinds of activated carbon fiber was about 2nm, and the preoxidization process improved the specific surface area and the content of oxygen-containing group on the fiber surface. AK-1 had the highest phenol adsorption capacity of 65.8 mg/g, AK-3 had the highest adsorption capacity of 156.7 mg/ g for methylene blue, and AK-2 had the highest specific surface area 1 518 m^2/g and the highest surface oxygen-containing group content, but did not have a high adsorption capacity for phenol and methylene blue, which indicated that the surface oxygen-containing group depressed the adsorption capacity for phenol and methylene blue. The adsorption kinetic study showed that the adsorption behavior of activated carbon fiber for phenol and methylene blue fitted the pseudo-second order kinetic equations.
出处
《合成纤维工业》
CAS
CSCD
北大核心
2009年第3期11-14,共4页
China Synthetic Fiber Industry
基金
纤维材料改性国家重点实验室基金项目(0601)
关键词
木棉
活性炭纤维
比表面积
吸附性能
结构
kapok
activated carbon fiber
specific surface area
adsorptive property
structure
