title: [Adhesion Force Analysis of Protein Fouling of PVDF Ultrafiltration Membrane Using Atomic Force Microscope].
abstract: To determine the fouling behavior of bovine serum albumin (BSA) on differet hydropniic PVDF ultrafiltration membrane over a range of pH, atomic force microscopy (AFM) and self-made colloidal probes were used to detect the microscopic adhesion forces of membrane-BSA and BSA-BSA, respectively. The results showed a positive correlation between the flux decline extent and the membrane-foulant adhesion force in the initial filtration stage, whereas the foulant-foulant interaction force was closely related to the membrane fouling in the later filtration stage. Moreover, the membrane-BSA adhesion interaction was stronger than the BSA-BSA adhesion interaction, which indicated that the fouling was mainly caused by the adhesion interaction between membrane and foulant. At the same pH, the adhesion force between PA membrane-BSA was smaller than that of PP membrane-BSA, illustrating the more hydrophilic the membrane was, the better the antifouling ability it had. The adhesion force between BSA-BSA fouled PA membrane was similar to that between BSA-BSA fouled PP membrane. These results confirmed that elimination of the membrane-BSA adhesion force is important to control the protein fouling of membranes.
authors.forename: Xu-dong
authors.initials: XD
authors.lastname: Wang
authors.forename: Miao
authors.initials: M
authors.lastname: Zhou
authors.forename: Xiao-rong
authors.initials: XR
authors.lastname: Meng
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Dan-xi
authors.initials: DX
authors.lastname: Huang
authors.forename: Si-qing
authors.initials: SQ
authors.lastname: Xia
mesh_terms: D057219:Biofouling; D008567:Membranes, Artificial; D018625:Microscopy, Atomic Force; D011145:Polyvinyls; D011506:Proteins / Q000737:chemistry*; D012710:Serum Albumin, Bovine / Q000737:chemistry; D014462:Ultrafiltration; D005465:Fluorocarbon Polymers
chemical_list: D008567:Membranes, Artificial; D011145:Polyvinyls; D011506:Proteins; D012710:Serum Albumin, Bovine; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers