Preparation of osmotic vaporizing alcohol permselective zeolite filling silicon rubber compound film
A silicone rubber composite membrane, a technology that preferentially penetrates alcohol, is applied in chemical instruments and methods, semipermeable membrane separation, membrane technology, etc., and can solve the problems of low strength of separation membrane, high production cost, and limitation of large-scale industrial application, and achieve The production process is simple, the production cost is low, and the effect of good pervaporation alcohol penetration performance
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Embodiment 1
[0020] 1) Dissolve 6g of PVDF in 34g of N,N-dimethylformamide to make a solution with a concentration of 15wt%, stir evenly at 70°C, filter, defoam, and directly scrape the film on one side of the polyester non-woven fabric, Water is used as a gel bath, and the PVDF porous bottom membrane supported by non-woven fabric is obtained by immersion precipitation phase inversion method. After the solvent exchange is complete, it is naturally dried.
[0021] 2) Disperse the MFI type zeolite with a silicon-aluminum ratio of 25 in acetone, add hydrofluoric acid (HF) aqueous solution, and prepare a hydrofluoric acid solution with a concentration of 20 g / ml, magnetically stir for 5 minutes, wash with acetone after filtering, Baking at 550°C for 12 hours.
[0022] 3) Dissolve 0.9g of acid-treated zeolite, 9g of PDMS with a viscosity of 5000Pa·s, 1.2g of phenyltriethoxysilane crosslinking agent, and 0.5g of catalyst dibutyltin dilaurate in 30g of toluene to prepare solution, stirred evenly...
Embodiment 2
[0029] 1) Dissolve 6g of PVDF in 34g of N,N-dimethylacetamide to make a solution with a concentration of 15wt%, stir evenly at 70°C, filter, defoam, and directly scrape the film on one side of the polyester non-woven fabric, Water is used as a gel bath, and the PVDF porous bottom membrane supported by non-woven fabric is obtained by immersion precipitation phase inversion method. After the solvent exchange is complete, it is naturally dried.
[0030] 2) Disperse the MFI type zeolite with a silicon-aluminum ratio of 50 in acetone, add hydrofluoric acid (HF) aqueous solution, and prepare a hydrofluoric acid solution with a concentration of 15 g / ml, magnetically stir for 5 minutes, wash with acetone after filtering, Baking at 450°C for 8 hours.
[0031] 3) Dissolve 1.8g of acid-treated zeolite, 9g of PDMS with a viscosity of 10000Pa·s, 1.2g of ethyl orthosilicate crosslinking agent, and 0.5g of catalyst dibutyltin dilaurate in 30g of tetrahydrofuran to prepare a solution, Stir e...
Embodiment 3
[0039] 1) Dissolve 6g of PVDF in 34g of triethyl phosphate to make a solution with a concentration of 15wt%, stir evenly at 70°C, filter, defoam, scrape the film directly on one side of the polyester non-woven fabric, and use water as a gel bath , the PVDF porous bottom membrane supported by non-woven fabric was obtained by immersion precipitation phase inversion method, and after the solvent exchange was complete, it was dried naturally.
[0040] 2) Disperse the MFI type zeolite with a silicon-aluminum ratio of 300 in acetone, add hydrofluoric acid (HF) aqueous solution, and prepare a hydrofluoric acid solution with a concentration of 6 g / ml, magnetically stir for 5 minutes, wash with acetone after filtering, Baking at 350° C. for 5 hours.
[0041] 3) Dissolve 2.7g of acid-treated zeolite, 9g of PDMS with a viscosity of 50000Pa·s, 1.2g of phenyltrimethoxysilane crosslinking agent, and 0.5g of catalyst dibutyltin dilaurate in 30g of n-heptane to prepare into a solution, stirr...
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