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Inner support hollow fibrous membrane and preparation method and application thereof

A fiber membrane and hollow technology, which is applied to the inner support hollow fiber membrane and its preparation and application fields, achieves the effect of reducing the possibility of broken wires and fouling, good elasticity, and improving water flux

Inactive Publication Date: 2016-11-09
盐城海普润科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has not been reported that it is used to prepare inner support membrane materials.

Method used

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  • Inner support hollow fibrous membrane and preparation method and application thereof
  • Inner support hollow fibrous membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Weigh 0.09g of MIL-101 and uniformly disperse it in 74.91g of dimethylacetamide under ultrasonic conditions, mix 7g of polyvinylpyrrolidone (K30) and 18g of polyvinyl chloride with a degree of polymerization of 3000 at 70°C under stirring conditions Dissolve the resin in the mixed solution of MIL-101 / dimethylacetamide for 3 hours, filter, stand for defoaming to obtain 18% polyvinyl chloride casting solution for use;

[0037] 2) Soak a polyethylene hollow braided rope with a length of 50 cm, an inner diameter of 0.5 mm, and an outer diameter of 1.2 mm with a 10% sodium hydroxide aqueous solution at 40°C for 1 hour, take it out, wash it and dry it in the air;

[0038] 3) Under the condition of 70°C, evenly coat the polyvinyl chloride casting solution prepared in step 1) on the outer surface of the hollow braided rope prepared in step 2), at a temperature of 10°C and a relative humidity of 99%RH After being placed in a cool environment for 30s, it was solidified by etha...

Embodiment 2

[0040] 1) Weigh 0.04g of MOF-177 and uniformly disperse it in 47.96g of dimethylformamide under ultrasonic conditions, mix 10g of polyethylene glycol (molecular weight 2000), 2g of alumina and 40g of weight-average A polyvinylidene fluoride resin with a molecular weight of 700,000 was dissolved in a mixed solution of MOF-177 / dimethylformamide for 5 hours, filtered, and defoamed to obtain a 40% polyvinylidene fluoride casting solution for use;

[0041] 2) Soak a polyester hollow braided rope with a length of 50 cm, an inner diameter of 2.2 mm, and an outer diameter of 3.2 mm with a 20% sodium hydroxide aqueous solution at 40°C for 1 hour, take it out, wash it and dry it in the air;

[0042] 3) At 50°C, apply the polyvinylidene fluoride casting solution prepared in step 1) on the outer surface of the polyester braided rope prepared in step 2), and immediately solidify in acetone at 30°C for 300s, Soak in deionized water at 20°C for 24 hours, and dry to obtain the inner-supported...

Embodiment 3

[0044] 1) Weigh 0.15g ZIF-8-NH 2 Uniformly dispersed in 69.85g dimethyl sulfoxide under ultrasonic conditions, 5g polyethylene glycol (molecular weight 600) and 25g polyethersulfone resin in ZIF-8-NH 2 Dissolve in the mixed solution of dimethyl sulfoxide / dimethyl sulfoxide for 5 hours, filter and stand for defoaming to obtain 25% polyethersulfone casting solution for later use;

[0045] 2) Soak a polypropylene hollow braided rope with a length of 50 cm, an inner diameter of 1.8 mm, and an outer diameter of 2.8 mm in 30% sodium hydroxide aqueous solution at 40° C. for 1 hour, take it out, wash it and dry it in the air;

[0046] 3) At 40°C, apply the polyethersulfone casting solution prepared in step 1) on the outer surface of the polypropylene braided rope prepared in step 2), at a temperature of 40°C and a relative humidity of 50% After being placed in an RH environment for 200s, it was solidified by ethanol at 20°C for 20s, then soaked in deionized water at 35°C for 15h, and...

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Abstract

The invention relates to an inner support hollow fibrous membrane which adopts a hollow braided rope as an inner supporting material. A base body polymer, a metal organic framework material and a pore forming agent are mixed together to be dissolved with a solvent, a membrane casting solution is obtained, the membrane casting solution coats the hollow braided rope, and solidification forming is performed to obtain the inner support hollow fibrous membrane. The metal organic framework material is adopted for improving the porosity and water flux of the inner support membrane; the proper proportion of the metal organic framework material to the pore forming agent in the membrane casting solution, organic coordination and synergism of the components are utilized, the interface wettability of the membrane casting solution and a coagulating bath can be effectively controlled, a coagulator and solvents in the membrane casting solution are easily dispersed and penetrate into the interface, effective combination of the membrane casting solution formula and the pore forming conditions is utilized, and the inner support hollow fibrous membrane of different pore diameters and different rejection performances can be spun; the obtained inner support hollow fibrous membrane can be used for an MBR and an immersed ultrafiltration assembly, the probability of broken yarn and sewage plugging is lowered, and the service life of the membrane is prolonged.

Description

field of invention [0001] The invention relates to an inner support hollow fiber membrane and its preparation method and application. Background technique [0002] As a kind of membrane form, hollow fiber membrane has the advantages of good pressure resistance, no support, high packing density, large membrane area per unit volume, and large flux. It is widely used in various fields of membrane separation. In my country, Chinese fiber membrane is one of the most widely used membrane technologies with the highest localization rate. However, due to the imperfect preparation process of domestic membranes, the strength of the membrane material is low, and the membrane filaments will often break during use, especially when used in When the integrated membrane bioreactor (MBR) is submerged, the fracture of membrane filaments is more serious. At present, membrane technology research and development and application personnel have realized this problem and have begun to develop high-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/34B01D71/30B01D71/68B01D69/10B01D69/08B01D67/00C02F1/44C02F3/00
CPCB01D67/0002B01D69/08B01D69/10B01D71/30B01D71/34B01D71/68C02F1/444C02F3/00
Inventor 刘必前
Owner 盐城海普润科技股份有限公司
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