Highly microporous bio-based activated carbon fibers (ACFs) were prepared through a simple reactivation method. Sawdust, as the starting material, was liquefied and melt-spun to produce the precursor fibers. Then, the precursor fibers were activated by KOH and reactivated by steam. By varying the conditions of the two activation processes, the formation mechanism of the pore structure was studied, and the result showed that steam reactivation has a positive effect on the development of microporosity. The sample with the optimal condition exhibited the highest specific surface area of 2578 m 2 ·g ?1 as well as the largest pore volume of 1.425 cm 3 ·g ?1 , where micropores contributed 70.3%. Due to its excellent texture properties, the ACF exhibited a high adsorption capacity of 1934 mg/g for iodine.
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机译：通过简单的活化方法制备了高微孔生物基活性炭纤维（ACF）。锯末作为原料被液化并熔融纺丝以生产前体纤维。然后，将前体纤维通过KOH活化并通过蒸汽再活化。通过改变两个活化过程的条件，研究了孔结构的形成机理，结果表明水蒸气再活化对微孔的发展具有积极作用。处于最佳条件的样品的最高比表面积为2578 m 2·g？1，最大孔体积为1.425 cm 3·g？1，其中微孔占70.3％。由于其优异的质地特性，ACF对碘的吸附容量高达1934 mg / g。
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