TY - DATA T1 - Surface Modification of Polyacrylonitrile Membrane by Chemical Reaction and Physical Coating: Comparison between Static and Pore-Flowing Procedures PY - 2018/04/16 AU - Yang Qin AU - Hu Yang AU - Zhenliang Xu AU - Feng Li UR - https://acs.figshare.com/articles/journal_contribution/Surface_Modification_of_Polyacrylonitrile_Membrane_by_Chemical_Reaction_and_Physical_Coating_Comparison_between_Static_and_Pore-Flowing_Procedures/6143528 DO - 10.1021/acsomega.7b02094.s001 L4 - https://ndownloader.figshare.com/files/11094461 KW - reactant concentration profile KW - pore-flowing KW - membrane KW - modification KW - antifouling property KW - flux KW - procedure N2 - The influences of static and pore-flowing procedures on the surface modification of a polyacrylonitrile (PAN) ultrafiltration membrane through chemical reaction and physical coating were investigated in detail. For chemical modification by ethanolamine, a membrane modified by the pore-flowing procedure showed a higher flux and different morphology. The reasons were explained by two effects: the pore-flowing resistance to the random thermal motion of PAN at high temperatures and different reaction kinetics related to the reactant concentration profile on the interface between the membrane and reaction solution and the kinetic property of the fluid (driving force and miscibility) and reaction (time and rate). For physical coating modification, a dense and flat layer via a loose and random layer was formed during the pore-flowing process and static process, which changed the flux and antifouling property of the membrane. The membrane prepared by dead-end filtration showed the best trade-off between the flux and antifouling property. Overall, the procedure kinetics plays an important role in the optimization of membrane modification. ER -