Structure and Morphology of PVDF-G-PAMPS Membrane

Abstract

A proton exchange membrane of blended poly (acrylamido-2- methylpropane sulfonic acid) (PAMPS) grafted onto modified poly (vinylidene fluoride) (PVDF) membrane (PVDF-g-PAMPS) was prepared. Fourier transform infrared spectroscopy is used to characterize changes of the membrane's microstructures after grafting. The morphology of the membrane's microstructures after grafting is studied by scanning electrolytic microscope.The results show that 2-acrylamido-2-methylpropane sulfonic acid is easily grafted into PVDF modified by Plain sodium silicate (Na4SiO4).

Preparation of cationic exchange membranes based on organo‐montmorillonite/poly(vinylidene fluoride) by two‐step chemically induced grafting method

“…Poly(vinylidene fluoride) (PVDF) is convincing a base material for preparation of ion‐exchange membranes because of its sufficient thermal, mechanical, and chemical stability . One effective method to introduce cationic conducting groups to PVDF membranes is chemically induced radical grafting polymerization . The PVDF membranes were treated in alkaline solutions with introduction of CC bonds to proceed radical grafting polymerization.…”

“…This method may be of particular interest for preparation of PVDF‐based cationic exchange membranes with excellent properties for various applications in chemical, biological, and biomedical fields. At present, the chemically induced grafting method used for preparing PVDF‐based cationic exchange membranes commonly applied single‐step induced grafting route . A functionalized PVDF membrane was obtained by chemical dehydrofluorination with alkaline solutions followed by treatment of the resulting membrane with vinyl monomers and initiator mixture.…”

Preparation of PVDF anionic exchange membrane by chemical grafting of GMA onto PVDF macromolecule

“…The arborescent samples exhibit comparable selectivity and low IEC values compared to Nafion 117. Guibao Guo et al [4][5][6][7] had also investigated PVDF-g-PSSA membrane and poly (vinylidene fluoride)-graft-poly (2-acrylamido-2-methylpropane sulfonic acid) (PVDF-g-PAMPS) membrane prepared by the method of chemically induced radical grafting polymerization. In our previous work [10], OMMT/PVDF-based cationic exchange membranes were prepared by two-step chemically induced grafting method.…”

“…In our previous work [10], OMMT/PVDF-based cationic exchange membranes were prepared by two-step chemically induced grafting method. However, for the chemically induced grafting methods reported in references [4][5][6][7][8][9][10], the grafting reaction is usually used to introduce cation-exchange groups and almost conducted on the surface of the treated PVDF membrane. The internal grafting reaction is limited and the cation-exchange groups are mainly grafted on the surface of the membranes, which limits the physical and chemical properties of the obtained PVDF cationexchange membranes.…”

“…One effective method to introduce ionic conducting groups to PVDF membranes and prepare PVDF ion-exchange membranes is chemically induced radical grafting polymerization [4][5][6][7][8][9][10]. The PVDF membranes are treated in oxidant or alkaline solutions with introduction of active sites to proceed radical grafting polymerization.…”