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Micro-cross-linking hybridized polysulfone porous membrane and preparation method thereof

A micro-cross-linked, porous membrane technology, applied in the field of membrane separation, can solve the problems affecting the stability and uniformity of the cross-linked hybrid membrane, the cross-linking process is not easy to control, the membrane preparation process is prolonged, etc., and the cross-linking process is easy to control. , Conducive to large-scale development and production, the effect of high production efficiency

Inactive Publication Date: 2017-03-29
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many problems in the preparation of polymer-based inorganic hybrid membranes by this method. The cross-linking process occurs after the film is formed. Due to the large steric hindrance, the cross-linking process is not easy to control, which affects the stability and uniformity of the cross-linked hybrid membrane. The other two cross-linking processes prolong the membrane preparation process and reduce the efficiency of membrane formation

Method used

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  • Micro-cross-linking hybridized polysulfone porous membrane and preparation method thereof
  • Micro-cross-linking hybridized polysulfone porous membrane and preparation method thereof
  • Micro-cross-linking hybridized polysulfone porous membrane and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Add 35 grams of polysulfone and 65 grams of N,N'-dimethylacetamide into the reaction kettle, blow nitrogen, and continue to stir at 60°C until fully dissolved; add 1 gram of acrylic acid and vinyl triethoxysilane (acrylic acid and The mole fraction ratio of vinyltriethoxysilane is 1:1), the initiator azobisisobutyronitrile is 0.5% of the mole fraction of the polymerizable monomer, react at 80°C for 48 hours, and obtain micro-crosslinking after vacuum defoaming Hybrid polysulfone membrane-making solution; apply it evenly on the surface of a glass plate, then immerse it in a water bath at 10°C for curing and molding, and wash to obtain a micro-crosslinked hybrid polysulfone porous membrane;

[0024] The water contact angle of the in-situ polymerized micro-crosslinked hybrid polysulfone porous membrane prepared in Example 1 was 75°, and the water flux was 104 L m -2 h -1 , The rejection rate of bovine serum albumin is 88%, the tensile strength is 2.7 MPa, and the elongati...

Embodiment 2

[0026] Add 15 grams of polysulfone and 85 grams of N,N'-dimethylformamide into the reaction kettle, blow nitrogen, and continue to stir at 100°C until fully dissolved; add 20 grams of acrylic acid and vinyltrimethoxysilane (acrylic acid and ethylene The mole fraction ratio of trimethoxysilane is 0.02:1), the initiator azobisisobutyronitrile is 5% of the mole fraction of the polymerizable monomer, react at 60°C for 1 hour, and obtain a micro-crosslinked hybrid after vacuum defoaming Polysulfone film-making solution; evenly scrape it on the surface of a glass plate, then immerse it in a mixed solution of water and N-methylpyrrolidone at 100°C (the mass content of water is 60%) to cross-link and solidify, wind up, wash, A micro-crosslinked hybrid polysulfone porous membrane is obtained;

[0027] The water contact angle of the in-situ polymerized micro-crosslinked hybrid polysulfone porous membrane prepared in Example 2 is 25°, and the water flux is 946L m -2 h -1 , the rejectio...

Embodiment 3

[0029] Add 20 grams of polysulfone and 80 grams of N-methylpyrrolidone into the reaction kettle, blow nitrogen, and continue to stir at 80°C until fully dissolved; add hydroxyethyl methacrylate and methacryloxypropyl tri(trimethylsilyl) A total of 10 grams of oxyalkyl) silane (hydroxyethyl methacrylate and methacryloxypropyl tris (trimethylsiloxane) silane mole fraction ratio 10:1), initiator azobisisobutyronitrile The mole fraction of the polymerizable monomer is 1.5%, react at 80°C for 12 hours, and obtain a micro-crosslinked hybrid polysulfone film-making solution after vacuum degassing; apply it evenly on the surface of a glass plate, and then immerse it in 90°C water Cross-linked and solidified in a mixed solution with N-methylpyrrolidone (the mass content of water is 40%), then rolled up and cleaned to obtain a micro-crosslinked hybrid polysulfone porous membrane;

[0030] The water contact angle of the in-situ polymerized micro-crosslinked hybrid polysulfone porous memb...

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Abstract

The invention discloses a micro-cross-linking hybridized polysulfone porous membrane and a preparation method thereof. The preparation method comprises the following steps: adding an organic monomer, an inorganic precursor and an initiator into a polysulfone liquid; heating and triggering monomer polymerization; performing vacuum defoamation, thereby acquiring a micro-cross-linking hybridized polysulfone membrane-making liquid; uniformly coating the micro-cross-linking hybridized polysulfone membrane-making liquid onto a glass plate surface; and soaking into a non-solvent bath, curing for shaping, and then cleaning, thereby acquiring the micro-cross-linking hybridized polysulfone porous membrane with a spongy porous structure. The preparation method disclosed by the invention is a one-step method; the organic monomer and the inorganic precursor are directly polymerized between the network chains of the polysulfone liquid; the organic monomer and the polymer are oxygen suppliers, so that the non-hydrogel-gel reaction of alkoxy silane in the membrane-making liquid can be boosted and a cross-linking network structure can be formed; the elution rate is low; and the polysulfone membrane can be endowed with long-lasting excellent hydrophily, anti-pollution capacity and mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, and in particular relates to a micro-crosslinked hybrid polysulfone porous membrane and a preparation method thereof. Background technique [0002] Membrane separation technology refers to the technology that uses a semipermeable membrane to selectively separate different substances in a solution at the molecular level or microscopic scale. As an efficient separation technology since the 20th century, membrane separation has been widely used in water treatment, biology, medicine, food, environmental protection and other industrial fields, and has produced huge economic and social benefits. Membrane is the core component of the whole membrane separation and filtration process. An ideal membrane should have high selectivity and permeability, high mechanical strength, good thermal stability, chemical stability and film-forming processability. However, in practical applications, it is d...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00C08F283/00C08F220/06C08F230/08C08J5/18C08L51/08
CPCB01D71/68B01D69/125B01D2323/30B01D2325/026B01D2325/30B01D2325/36C08F283/00C08J5/18C08J2351/08C08F220/06C08F230/08
Inventor 薛立新朱丽静宋海明
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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