以棉纤维为前驱体,经聚磷酸铵(APP)浸泡,预氧化和碳化制备棉纤维基活性碳纤维。研究APP浓度、预氧化温度和时间等条件对活性碳纤维形貌、孔径和得碳率的影响。热重结果表明:经APP浸泡后,棉纤维的热裂解温度向低温方向移动,失重率大大降低。扫描电镜结果表明:经预氧化和碳化处理后,纤维未发生粘连和严重断裂,纤维形貌并无发生改变。活性碳纤维大部分为微孔结构、孔径分布较宽。预处理温度为400℃、时间为60min、APP浓度为15%(质量分数)时,活性碳纤维得碳率最高达49.2%,比表面积为280.13m2/g。
Cotton fibers based activated carbon fibers were fabricated by cotton fibers as precursor and immersion in ammonium polyphosphate (APP) solution,pre-oxidation and carbonation.The effect of APP concentration,pre-oxidation temperature and time on the morphology,pore size and carbon yield were investigated.The thermogravimetry results showed that the pyrolysis temperature decreased,and the weight loss greatly reduced after immersion APP solution.The scanning electron microscopy results showed that adhesion and greatly breakage will not occur after immersion APP solution.Most of pores of activated carbon fibers were micropore and pore size distribution was widen.The highest of yield carbon reached to 49.2% and surface area was 280.13m2/g with pre-oxidation temperature 400℃,pre-oxidation time 60min and APP concentration 15%.
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基金资助
国家自然科学基金(51406141);福建省自然科学基金(2018J05092);福建省高校产学研合作(2018Y4011);福建省教育厅项目(JAT170595和JAT170596);武夷学院项目(XD201501)
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