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Silver-loaded nano-titanium dioxide/polrvinyl chloride membrane and preparation method thereof

A nano-titanium dioxide and polyvinyl chloride membrane technology is applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve the effects of easy realization, improved surface energy, and low energy consumption

Inactive Publication Date: 2011-07-06
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no low-pressure membrane (ultrafiltration or microfiltration membrane) with disinfection effect has been reported.

Method used

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  • Silver-loaded nano-titanium dioxide/polrvinyl chloride membrane and preparation method thereof
  • Silver-loaded nano-titanium dioxide/polrvinyl chloride membrane and preparation method thereof
  • Silver-loaded nano-titanium dioxide/polrvinyl chloride membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Dissolve 3.5 grams of polyvinyl chloride (PVC) in 35 grams of N-N dimethylacetamide solvent, and after it is completely dissolved, add 0.5 grams of silver-loaded nano-titanium dioxide powder evenly in the process of stirring, and immediately add 0.5 grams of Dispersant sodium hexametaphosphate, finally add 1.5 grams of pore-forming agent polyvinylpyrrolidone (PVP), and stir evenly for 24 hours to make the silver-loaded nano-titanium dioxide particles evenly dispersed in the solution. Cast film on glass by L-S phase inversion method at 25°C and 65% humidity; after volatilization for 50 seconds, put it into 20% ethanol coagulation solution, after the film peels off automatically, take the glass plate out of the coagulation solution, and the film remains Soak in the coagulation solution for 24 hours, rinse the membrane with distilled water, and prepare the silver-loaded nano-titanium dioxide modified polyvinyl chloride flat separation membrane.

[0065] The characteristics...

Embodiment 2

[0067] Dissolve 3.5 grams of polyvinyl chloride (PVC) in 35 grams of N-N dimethylacetamide solvent, and after it is completely dissolved, add 0.5 grams of silver-loaded nano-titanium dioxide powder evenly in the process of stirring, and immediately add 0.486 grams of Dispersant sodium hexametaphosphate, finally add 0.5 grams of pore-forming agent polyvinylpyrrolidone (PVP), and stir evenly for 24 hours to make the silver-loaded nano-titanium dioxide particles evenly dispersed in the solution. Cast film on glass by L-S phase inversion method at 25°C and 65% humidity; after volatilization for 50 seconds, put it into 20% ethanol coagulation solution, after the film peels off automatically, take the glass plate out of the coagulation solution, and the film is Soak in the coagulation solution for 24 hours, rinse the membrane with distilled water, and prepare a silver-loaded nano-titanium dioxide modified polyvinyl chloride flat separation membrane.

[0068] The characteristics of t...

Embodiment 3

[0070] Dissolve 5.0 grams of polyvinyl chloride (PVC) in 35 grams of N-N dimethylacetamide solvent, and after it is completely dissolved, add 0.5 grams of silver-loaded nano-titanium dioxide powder evenly in the process of stirring, and immediately add 0.5 grams of Dispersant sodium hexametaphosphate, finally add 1.5 grams of pore-forming agent polyvinylpyrrolidone (PVP), and stir evenly for 24 hours to make the silver-loaded nano-titanium dioxide particles evenly dispersed in the solution. Cast film on glass by L-S phase inversion method at 25°C and 65% humidity; after volatilization for 50 seconds, put it into 20% ethanol coagulation solution, after the film peels off automatically, take the glass plate out of the coagulation solution, and the film is Soak in the coagulation solution for 24 hours, rinse the membrane with distilled water, and prepare a silver-loaded nano-titanium dioxide modified polyvinyl chloride flat separation membrane.

[0071] The characteristics of the...

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Abstract

The invention provides a silver-loaded nano-titanium dioxide / polrvinyl chloride membrane and a preparation method thereof. The method comprises the following steps of: dissolving polrvinyl chloride in an N-N-dimethylacetamide solvent; adding silver-loaded nano-titanium dioxide, and immediately adding a dispersant, namely sodium hexametaphosphate; adding a pore-forming agent, namely polyvinylpyrrolidone; standing at the temperature of between 20 and 30 DEG for 1 to 2 days for deaeration; casting deaerated casting solution to form a membrane at the temperature of between 15 and 30 DEG C under the humidity of between 40 and 80 percent; volatizing the casting solution in the air for 10 to 100 seconds after the membrane is cast, slowly placing into ethanol coagulation liquid at the concentration of between 10 and 50 percent and soaking for 12 to 24 hours; and taking the membrane out from the coagulation liquid and rinsing by using distilled water to obtain the silver-loaded nano-titanium dioxide modified polrvinyl chloride separation membrane. By the method, organic membranes are subjected to antibacterial modification, the disinfection and antipollution performance of the membranes can be improved, and the clear water filtration flux of the membranes can be improved.

Description

technical field [0001] The invention relates to a polyvinyl chloride (PVC)-based membrane material, and also relates to a preparation method of the polyvinyl chloride-based membrane material. Background technique [0002] Membrane separation technology has the advantages of simple equipment, convenient operation, no phase change, no chemical change, etc. It has been widely promoted and applied in the field of drinking water purification and sewage treatment and reuse. At present, the widely used membrane materials are mainly some polymers, such as polyvinylidene fluoride, polysulfone, polyethylene, etc., which have micron or nanometer pore size on the surface, and use sieving to intercept suspended solids, organic pollutants, bacteria, viruses, etc. . [0003] Generally, organic membrane materials only have the function of retaining bacteria but have no antibacterial or bactericidal properties. This makes the surface of the membrane material easy to be attached by microorg...

Claims

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Application Information

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IPC IPC(8): B01D71/30B01D67/00B01D69/02C02F1/44C02F1/50
Inventor 赵方波邱峰谢荣华史凤娇
Owner HARBIN ENG UNIV
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