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Modification of PTFE Fiber and Its Adsorption Property for Bilirubin

HAN Xiao-Yan1,2, ZHANG Zheng-Pu1*   

    1. 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, China
  • Received:2008-07-17 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10
  • Contact: ZHANG Zheng-Pu

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Abstract: The adsorbent of bilirubin based on polytetrafluoroethylene(PTFE) fiber was prepared by 60Co radiation-induced graft polymerization with GMA 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. Experimental data indicate that the adsorption capacity of the grafted fiber is greatly affected by the pH of the medium, and in near neutral solution of pH=6.5, the 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 words: Polytetrafluoroethylene(PTFE) fiber, Irradiation grafting, Bilirubin adsorption

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