TiO2 / PVDF cross blend cation exchange membrane and preparation method
A cation exchange membrane and blending technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high water concentration diffusivity, large membrane salt diffusivity, and low membrane mechanical strength, etc. To achieve the effect of simple film forming process, improved hydrophilicity and increased preparation cost
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specific Embodiment approach 1
[0010] Specific embodiment one: the TiO of this embodiment 2 / PVDF blended cation exchange membrane is made of the following components by weight percentage: polyvinylidene fluoride (referred to as PVDF): 4-11wt.%, polypropylene: 1.4-4.6wt.%, cross-linking agent: 0.1-4wt. %, titanium dioxide particles: 0.04-0.44wt.%, organic solvents containing active groups: 79-95wt.%.
[0011] The addition of titanium dioxide particles in this embodiment improves the surface energy of the polyvinylidene fluoride cation exchange membrane, which increases the hydrophilicity of the membrane by 30%; the addition of titanium dioxide particles in this embodiment not only retains the polyvinylidene fluoride cation exchange membrane The original excellent performance also increases the mechanical strength of the membrane by 25%;
specific Embodiment approach 2
[0012] Specific implementation mode two: TiO in this embodiment mode 2 / PVDF blended cation exchange membrane is made of the following components by weight percentage: polyvinylidene fluoride: 6wt.%, polypropylene: 3wt.%, crosslinking agent: 1wt.%, titanium dioxide particles: 0.40wt.%, containing active Group organic solvent: 86wt.%.
specific Embodiment approach 3
[0013] Specific implementation mode three: TiO in this implementation mode 2 / PVDF blended cation exchange membrane is made of the following components by weight percentage: polyvinylidene fluoride: 5wt.%, polypropylene: 4.5wt.%, crosslinking agent: 0.5wt.%, titanium dioxide particles: 0.4wt.%, Organic solvent containing active groups: 84wt.%.
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