Low-pressure hollow fiber nanofiltration membrane

A nanofiltration membrane and hollow technology, which is applied in the field of low-pressure hollow fiber nanofiltration membranes, can solve the problems of complex production process, high production cost and use cost, and low water production rate of roll-type nanofiltration membranes, and achieve good chlorine resistance , Improve the utilization rate, improve the effect of water production rate

Active Publication Date: 2015-03-25
杭州安诺过滤器材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the existing nanofiltration membranes are roll-type nanofiltration membranes. Roll-type nanofiltration membranes are mainly used in the material separa

Method used

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  • Low-pressure hollow fiber nanofiltration membrane
  • Low-pressure hollow fiber nanofiltration membrane
  • Low-pressure hollow fiber nanofiltration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A low-pressure hollow fiber nanofiltration membrane. The low-pressure hollow fiber nanofiltration membrane includes a polysulfone hollow fiber base membrane and a dense membrane on the base membrane. During the preparation of the base membrane: N,N-dimethylacetamide 100 20 parts, 20 parts of dimethyl sulfoxide, 10 parts of polyethylene glycol 400, 5 parts of povidone K25, 1.5 parts of nano silicon dioxide, 18 parts of polysulfone; the dense film is composed of the following parts by weight : 100 parts of butyl acetate, 20 parts of dimethyl carbonate, 8 parts of acrylic resin, 3 parts of carboxy-type vinyl acetate resin, 0.4 part of diphenylmethane diisocyanate.

Embodiment 2

[0029] A low-pressure hollow fiber nanofiltration membrane. The low-pressure hollow fiber nanofiltration membrane includes a polysulfone hollow fiber base membrane and a dense membrane on the base membrane. During the preparation of the base membrane: N,N-dimethylacetamide 100 parts, 20 parts of dimethyl sulfoxide, 10 parts of polyethylene glycol 400, 5 parts of povidone K25, and 18 parts of polysulfone; the dense film is composed of the following components by weight: 100 parts of butyl acetate, 20 parts of dimethyl carbonate, 8 parts of acrylic resin, 3 parts of carboxy-type vinyl acetate resin, 0.4 part of diphenylmethane diisocyanate.

Embodiment 3

[0031] A low-pressure hollow fiber nanofiltration membrane. The low-pressure hollow fiber nanofiltration membrane includes a polysulfone hollow fiber base membrane and a dense membrane on the base membrane. During the preparation of the base membrane: N,N-dimethylacetamide 100 parts, 30 parts of dimethyl sulfoxide, 10 parts of polyethylene glycol 400, 5 parts of povidone K25, and 18 parts of polysulfone; the dense film is composed of the following components by weight: 100 parts of butyl acetate, 20 parts of dimethyl carbonate, 8 parts of acrylic resin, 3 parts of carboxy-type vinyl acetate resin, 0.4 part of diphenylmethane diisocyanate.

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Abstract

The invention relates to a low-pressure hollow fiber nanofiltration membrane which comprises a polysulfone hollow fiber base membrane; the low-pressure hollow fiber nanofiltration membrane is prepared by drying the base membrane, dipping the base membrane into a film formation liquid which takes acrylic resin, carboxyl type vinyl chloride-vinyl acetate resin and methylene diphenyl diisocyanate as solutes and takes butyl acetate and dimethyl carbonate as solvents, and lifting an upper dense membrane. The low-pressure hollow fiber nanofiltration membrane is capable of effectively removing most divalent ions and a small number of monovalent ions in water, so that the effects of removing salt and purifying water can be achieved, and the human body is supplemented with trace mineral substances; furthermore, the low-pressure hollow fiber nanofiltration membrane is also capable of effectively improving the water obtaining rate and the water yield of a household water purifier; the low-pressure hollow fiber nanofiltration membrane can run at the low pressure, so that the running cost and the manufacturing cost of the household water purifier are greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of household water purification, and in particular relates to a low-pressure hollow fiber nanofiltration membrane. Background technique [0002] With the serious pollution of domestic water bodies, people pay more and more attention to water quality safety. Many families have installed household water purifiers. General household water purifiers are made of PP cotton, activated carbon, ultrafiltration, reverse osmosis, and coconut shell activated carbon. and other filter materials. [0003] In the existing household water purifiers, the reverse osmosis membrane is mainly used for filtration. Due to the characteristics of the household reverse osmosis membrane, its desalination rate is very high, so the salt content of the effluent is basically zero. At the same time, the household reverse osmosis membrane needs high pressure operation , Generally, its operating pressure needs to be 0.5MP ~ 0.7MP. Due to th...

Claims

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Application Information

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IPC IPC(8): B01D69/08B01D71/68C02F1/44
Inventor 朱欣峰陈梦泽
Owner 杭州安诺过滤器材有限公司
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