Effect of protein on PVDF ultrafiltration membrane fouling behavior under different pH conditions: Interface adhesion force and XDLVO theory analysis

Release time:2024-08-09  Hits:

• Affiliation of Author(s):环境与市政工程学院
• Journal:Frontiers of Environmental Science & Engineering
• Key Words:中文关键字：PVDF膜；膜污染；粘附力；蛋白质；界面自由能，英文关键字：PVDF membrane; membrane fouling; adhesion force; p
• Abstract:To further determine the fouling behavior of bovine serum albumin (BSA) on different hydrophilic PVDF ultrafiltration (UF) membranes over a range of pH values, self-made atomic force microscopy (AFM) colloidal probes were used to detect the adhesion forces of membrane–BSA and BSA–BSA, respectively. Results showed that the membrane–BSA adhesion interaction was stronger than the BSA–BSA adhesion interaction, and the adhesion force between BSA–BSA-fouled PVDF/PVA membranes was similar to that between BSA–BSA-fouled PVDF/PVP membranes, which indicated that the fouling was mainly caused by the adhesion interaction between membrane and BSA. At the same pH condition, the PVDF/PVA membrane–BSA adhesion force was smaller than that of PVDF/PVP membrane–BSA, which illustrated that the more hydrophilic the membrane was, the better antifouling ability it had. The extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theory predicts that the polar or Lewis acid–base (AB) interaction played a dominant role in the interfacial free energy of membrane–BSA and BSA–BSA that can be affected by pH. For the same membrane, the pH values of a BSA solution can have a significant impact on the process of membrane fouling by changing the AB component of free energy.
• Note:王旭东
• Co-author:周淼,黄丹曦
• First Author:wanglei,mengxiaorong,wangxudong
• Indexed by:Journal paper
• Volume:卷：10
• Issue:期：4
• Page Number:页：12
• Translation or Not:no
• Date of Publication:2016-08-01