聚四氟乙烯纤维的改性及其对胆红素的吸附

PTFE

摘　要:以聚四氟乙烯（PTFE）纤维为基质，以甲基丙烯酸缩水甘油酯（GMA）为单体，通过辐照接枝聚合制备了门FE-g-GMA纤维，用聚乙烯亚胺（PEI）与PTFE-g-GMA纤维进行开环反应制得新型吸附剂PTFE-g-GMA-PEI．考察了PTFE-g-GMA-PEI吸附剂对溶液中胆红素的吸附动力学、吸附量及pH、离子强度及温度等因素对胆红素吸附的影响．实验结果表明，该吸附剂对胆红素有较高的吸附容量及良好的选择吸附性能，其吸附行为遵循Langmuir吸附模式．
关键词:聚四氟乙烯纤维 辐照接枝 胆红素吸附

Modification of PTFE Fiber and Its Adsorption Property for BilirubinHAN Xiao-Yan,ZHANG Zheng-Pu1. Key Laboratory of Function Polymeric Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China; 2. Institute of Chinese Medica, Tianjin Key Laboratory of Chemistry and Analysis of Chinese Materia Medica, Tianjin University of Traditional Chinese Medicine, Tianjin 300193, ChinaAbstract:The adsorbent of bilirubin based on radiation-induced graft polymerization with GMA polytetrafluoroethylene （PTFE） fiber was prepared by ^60Co and by subsequent chemical modification of the epoxy group of PTFE-g-GMA fiber with PEI. The highest amino content on the PTFE-g-GMA-PEI fiber is 1.87 mmol/g. The effect of pH, ionic strength, temperature, BSA, initial bilirubin concentration and adsorption dynamics on the adsorption capacity of PTFE-g-GMA-PEI fiber for bilirubin were investigated in a batch system. Experi- mental data indicate that the adsorption capacity of the urn, and in near neutral solution of pH = 6.5, the grafted fiber is greatly affected by the pH of the medi- grafted fiber have the highest adsorption capacity（9.6 mg/ g）. The bilirubin adsorption on the PTFE-g-GMA-PEI fiber obeyed the Langmuir model. Besides, the PTFE- g-GMA-PEI fiber has the considerablely competitive ability to combine bilirubin with BSA.
Key wordsolytetrafluoroethylene (PTFE)fiber ; Irradiation grafting ; Bilirubin adsorption