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A new method for the functional modification of polyethersulfone (PES) is described in this paper in which PES was sulfonated by chlorosulfonic acid firstly and then chlorinated by phosphorus pentachloride. Thereby, chlorosulfonic groups (-SO2Cl) were introduced in PES successfully, and the degree of the chlorosulfonation was about 15%. Since the chlorosulfonic group is reactive enough towards the amino group (-NH2), the conformation of chlorosulfonic-based covalent bonding functional route could further extend the PES application area with versatile functionality. In this article, hydroxyl (-OH), carboxyl (-COOH), amino (-NH2) and methyl (-CH3) groups were grafted onto a PES matrix through the reaction of chlorosulfonic groups and the amino groups. The functional groups have effects on protein adsorption and cell behavior. The membrane modified with an amino group was in favor of cell adhesion and proliferation, and the membrane modified with hydroxyl and methyl did not so well as the membrane modified with an amino group, which will give guidance for biomaterial modification.

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Bisphenol A (BPA) imprinted polyethersulfone (PES) particles were prepared for the recognition of BPA by means of phase inversion method. During the preparation of the BPA-imprinted particles, acetone, ethanol and acetone/ethanol solutions were used to extract the template BPA molecules. The SEM morphology and the recognition experiments suggested that the acetone/ethanol provided an efficient way to extract the BPA from the imprinted PES particles. The binding and recognition ability for the imprinted particles disappeared under alkali condition, and they recovered as soon as possible when the solution changed from alkali condition to neutral or acid condition. With the addition of Na 1 , Mg 21 , and Cl 2 , the binding amounts for the imprinted particles and nonimprinted particles were not changed heavily, which suggested the potential application of the particles in seawater. In the BPA/BPA analogue mixed solution, the imprinted particles showed selectivity for the template molecules BPA. The FTIR results suggested that the PES and BPA interacted through hydrogen bonds.