丙烯酸接枝改性丙纶非织造布的吸附与解吸研究  

Adsorption and desorption of acrylic acid-grafted polypropylene nonwovens

作　　者：施颖[1] 朱雪兰[1] 王夕恬 石小丽[2] 朱新生[1,3] 

机构地区：[1]苏州大学纺织与服装工程学院,江苏苏州215021 [2]苏州大学材料与化学化工部,江苏苏州215123 [3]现代丝绸国家工程实验室,江苏苏州215123

出　　处：《合成纤维工业》2015年第1期44-49,共6页China Synthetic Fiber Industry

基　　金：江苏高校优势学科建设工程项目资助;苏州市人民政府项目(SYG201202);江苏省环保厅项目(2012009)资助支持

摘　　要：采用丙烯酸接枝改性聚丙烯非织造布(PP-g-AA)对阳离子红X-GRL染料进行吸附与解吸,探讨了PP-g-AA对染料的吸附动力学机理、解吸过程和解吸动力学机理,以及基于动态吸附的过滤分离操作,分析了PP-g-AA对染料吸附-解吸再生循环利用的可行性。结果表明:不同初始染料浓度下,PP-g-AA的吸附动力学符合Lagergren's准二级动力学模型和双指数模型;解吸液的最佳配比为表面活性剂质量分数5%,乙醇与水的体积比3∶7,解吸率随吸附量的增大呈现先增大后减小的趋势,解吸符合Lagergren's准二级动力学模型;动态吸附-解吸再生循环10次后,染料的去除率达96%以上,再生循环8次时,PP-g-AA的跨膜压力为37.1 k Pa,水通量最大达38.6 L/(m2·h)。The adsorption and desorption of acrylic acid grafted polypropylene （PP-g-AA） nonwovens to cationic red X-GRL dye were studied. The adsorption and desorption process and kinetics of PP-g-AA to cationic dyes were discussed. The feasibility of adsorption-desorption recycling of cationic dyes on PP-g-AA was analyzed based on dynamic adsorptive filtration and separation operation. The results showed that both Lagergren＇s pseudo-second order and double-exponential models were applicable for the fitting of the adsorption kinetic data of PP-g-AA at different dye initial concentration; the optimal ingredient of desorption solution was 5% anionic surfaetant by mass fraction and 3 ： 7 ethanol-to-water volume ratio; the desorption rate was increased and then decreased with the increase of adsorption capacity; the desorption kinetics also followed Lagergren＇s pseudo-second order model; the removal rate of dyes was above 96% after 10-time dynamic adsorption-desorption cycles; and the transmembrane pressure of PP-g-AA was 37.1 kPa and the water flux reached the maximal value of 38.6 L/（ m^2 · h） after 8-time recycling cycles.

关 键 词：聚丙烯纤维 非织造布 丙烯酸 接枝 阳离子染料 吸附分离 解吸 过滤分离膜 

分 类 号：TS176[轻工技术与工程—纺织材料与纺织品设计] O647.3[轻工技术与工程—纺织科学与工程]