摘要
以D201型苯乙烯系强碱性Cl−型阴离子交换树脂和醋酸纤维素(CA)为原料,采用相转化法制备了成型的季铵化变湿吸附剂薄膜(QAM),通过不同含氟聚合物掺杂进行疏水性调控,制备了含氟聚合物季铵化变湿吸附剂薄膜(QAM-氟聚合物)。采用SEM、FTIR、全自动比表面和孔径分布分析仪和基础性动静态接触角仪对QAM和QAM-氟聚合物进行了表征。通过CO_(2)吸附和动力学实验、疏水性及干燥性能测试,考察了4-氟苯乙烯(4FS)掺杂量(x%,4FS质量占CA与4FS总质量的百分数,下同)对QAM-氟聚合物(QAM-x%4FS)的CO_(2)吸附性能及其薄膜性能的影响。对最佳性能的吸附剂进行了相对湿度CO_(2)吸附响应及循环利用性能测试。结果表明,4FS的掺杂能够显著改善QAM吸附剂的孔隙结构和疏水性,提高CO_(2)吸附性能。QAM-20%4FS性能最佳,在相对湿度22.5%~90.0%的条件下,CO_(2)吸附容量保持在1.03~1.25 mmol/g,半吸附时间在4.15~7.30 min。在相对湿度为90.0%的条件下,QAM-20%4FS吸附容量和峰值吸附速率比QAM提高了37.86%和79.75%。QAM-20%4FS经过8次循环后,吸附容量仍稳定在1.15~1.20 mmol/g,再生程度>90%。
Quaternized hygroscopic adsorbent film(QAM)was prepared by phase conversion using D201 styrene strong basic Cl−type anion exchange resin and cellulose acetate(CA)as raw materials,and further doped with different fluoropolymers for hydrophobicity regulation to obtain quaternary ammonium hygroscopic fluoropolymer-containing adsorbent films(QAM-fluoropolymers).QAM and QAM-fluoropolymers were characterized by SEM,FTIR,automatic specific surface and aperture distribution analyzer and basic static and dynamic contact angle instrument.The effects of doping amount of 4-fluorophene(4FS)(x%,the percentage of 4FS mass in the total mass of CA and 4FS,the same below)on CO_(2)adsorption and film properties of QAM-fluoropolymers(QAM-x%4FS)were evaluated through CO_(2)adsorption and kinetic experiments,hydrophobicity and drying performance tests.The CO_(2)adsorption response to relative humidity and the recycling performance of the best adsorbent were analyzed.The results showed that the doping of 4FS could significantly improve the pore structure and hydrophobicity of QAM adsorbent,as well as the CO_(2)adsorption performance.QAM-20%4FS displayed the best performance,maintaining the CO_(2)adsorption capacity at 1.03~1.25 mmol/g and the half adsorption time at 4.15~7.30 min at relative humidity of 22.5%~90.0%.Under the relative humidity of 90.0%,QAM-20%4FS increased the adsorption capacity and peak adsorption rate by 37.86%and 79.75%,respectively,in comparison to QAM.After 8 cycles,the adsorption capacity of QAM-20%4FS was still stable at 1.15~1.20 mmol/g,and the regeneration degree was more than 90%.
作者
高云芳
宋新山
GAO Yunfang;SONG Xinshan(College of Environmental Science and Engineering,Donghua University,Shanghai 201600,China)
出处
《精细化工》
北大核心
2025年第10期2124-2131,2149,共9页
Fine Chemicals
基金
国家自然科学基金项目(52170152)
上海市科技攻关项目(21DZ1202402)。
