A kind of polyvinyl chloride/sulfonated polyethersulfone blend membrane and preparation method thereof
A technology of sulfonated polyethersulfone and polyvinyl chloride, which is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of strong hydrophobicity and pollution, achieve good permeability, simple process, The effect of high water flux
Inactive Publication Date: 2015-12-02
DONGHUA UNIV
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Problems solved by technology
Polyvinyl chloride (PVC) has good physical and chemical stability, acid and alkali resistance and biological erosion, but its hydrophobicity is too strong, and it is easily polluted by organic substances such as oil and protein.
Method used
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Embodiment 1
[0029] Add polyvinyl chloride and sulfonated polyethersulfone with a total mass concentration of 14wt% to 86wt% N,N-dimethylacetamide, place in a water bath and stir at a constant temperature of 80°C until completely dissolved, and then Stand still and defoam to obtain the casting liquid, and set aside; the temperature of the clean scraping plate, the panel of the flat scraping machine and the casting liquid should be kept the same, and the thickness and speed of the scraping film should be set. The thickness of the scraping film should be 0.3mm. The film scraping speed is 4000mm / min. Pour the prepared casting solution on one end of the scraping plate, start the scraping machine to scrape a liquid film with a thickness of about 0.3mm, then put it into a water bath at 25°C to form a film, and take it out of the water bath after the film falls off , fully washed with distilled water, soaked to remove the solvent remaining in the film, then soaked in 50vol% glycerin aqueous solut...
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Abstract
The invention relates to a polyvinyl chloride / sulfonated polyether sulfone blended film and a preparation method thereof. The blended film is prepared from the polyvinyl chloride and the sulfonated polyether sulfone according to the mass ratio of (1:9) to (9:1). The preparation method comprises the following steps: dissolving the polyvinyl chloride and the sulfonated polyether sulfone according to the mass ratio of (1:9) to (9:1) into a solvent, stirring for dissolving at the temperature of 80-85 DEG C, and performing still standing and defoaming to obtain a casting solution; under the condition with the environment humidity of 50-55 percent at the room temperature, scrapping the casting solution with the temperature of 80-85 DEG C to be a liquid thin film, placing the thin film into a water bath at the temperature of 10-25DEG C, after the thin film drops off, taking out the thin film to be subjected to washing, soaking and natural drying to obtain the blended film. The preparation method of the blended film is simple in process, low in cost, and easy to realize industrialization; the prepared blended film is good in permeability, large in water flux and high in strength, and has better pollution-resistant performance and an excellent application prospect.
Description
technical field [0001] The invention belongs to the field of blended membranes and their preparation, in particular to a polyvinyl chloride / sulfonated polyethersulfone blended membrane and a preparation method thereof. Background technique [0002] There have been many literature and patent reports on the use of polyvinyl chloride (PVC) as a membrane material. Zhao Fangbo, Xie Ronghua, Zhang Xiaohui and others reported hydrophilic polyvinyl chloride film and its preparation method (application number: CN101513593), the preparation technology is to use polyvinyl chloride, dissolve polyvinyl chloride solvent, vinyl acetate, nano-alumina , pore forming agent and sodium hexametaphosphate or sodium dodecylbenzenesulfonate or citric acid, made according to weight percentage; Zhu Fangqin and others reported a polyvinyl chloride hollow fiber membrane and its preparation method (application number: CN102343222A ), its preparation technology is to first synthesize styrene-vinyl aceta...
Claims
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IPC IPC(8): B01D71/68B01D71/30B01D67/00
Inventor 王军吴俊蒋淑红陈银川
Owner DONGHUA UNIV