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Preparation method of in-situ embedding reinforced hollow composite membrane

A composite membrane and hollow technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of insufficient peel strength of composite membranes, difficulties in industrial production, high cost of membrane materials, etc., to overcome the peel strength Insufficient, low cost, simple preparation method

Active Publication Date: 2017-08-15
杭州汉膜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems of insufficient peel strength of the composite membrane in the prior art, difficulties in industrial production and high cost of membrane materials, and provide a method for preparing an in-situ embedded reinforced hollow composite membrane

Method used

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  • Preparation method of in-situ embedding reinforced hollow composite membrane
  • Preparation method of in-situ embedding reinforced hollow composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 20% polyethersulfone resin (BASF 6020P), 55% N, N-dimethylformamide, 11% polyethylene glycol 200, 9% polyvinylpyrrolidone K-30 and 5% sulfonated polyether by weight percentage Add the sulfone into the stirring tank, stir at 80° C. for 12 hours, filter, and vacuum defoam to obtain the coating material liquid. Eight polyester composite yarns with a denier of 750 were respectively guided by a rotating mandrel and wound flatly and cross-wound on a stainless steel hollow mandrel with an outer diameter of 4 mm, and the intersection points were ultrasonically welded and bonded to form a network tubular substrate. Under the action of traction, the network tubular substrate continuously enters the coating head, and at the same time, the coating liquid is delivered to the coating head by the metering pump. The coating liquid penetrates into the yarn and completely infiltrates the coated network tubular substrate. The network tubular substrate covered by the coating liquid leaves ...

Embodiment 2

[0045] 20% polyethersulfone resin (BASF 6020P), 50% N, N-dimethylacetamide, 20% trimethyl phosphate, 6% polyethylene glycol 200, 3% polyvinylpyrrolidone K-30 and Add 1% sulfonated polyethersulfone into a stirring tank, stir at 80° C. for 12 hours, filter, and vacuum defoam to obtain a coating material solution. Eight polyester composite yarns with a denier of 750 were respectively guided by a rotating mandrel and wound flatly and cross-wound on a stainless steel hollow mandrel with an outer diameter of 4 mm, and the intersection points were ultrasonically welded and bonded to form a network tubular substrate. Under the action of traction, the network tubular substrate continuously enters the coating head, and at the same time, the coating liquid is delivered to the coating head by the metering pump. The coating liquid penetrates into the yarn and completely infiltrates the coated network tubular substrate. The network tubular substrate covered by the coating liquid leaves the ...

Embodiment 3

[0047] 17% by weight polyethersulfone resin (Veradel 3000P from Solvay, Belgium), 62% N, N-dimethylformamide, 10% polyethylene glycol 200, 10% polyvinylpyrrolidone K-30 and 1% sulfone Put the polyethersulfone into the stirring tank, stir at 80°C for 12 hours, filter and vacuum defoam to obtain the coating material liquid. 16 polyester composite yarns with a denier of 1000 are respectively guided by a rotating mandrel to be flat and cross-wound on a stainless steel hollow mandrel with an outer diameter of 8 mm, and the intersection points are ultrasonically welded and bonded to form a network tubular substrate. Under the action of traction, the network tubular substrate continuously enters the coating head, and at the same time, the coating liquid is delivered to the coating head by the metering pump. The coating liquid penetrates into the yarn and completely infiltrates the coated network tubular substrate. The network tubular substrate covered by the coating liquid leaves the...

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Abstract

The invention relates to a separation membrane material preparation and enhanced modification technology, and aims to provide a preparation method for an in-situ embedded enhanced hollow composite membrane. The preparation method comprises: mixing polymer resin, a pore-foaming agent, a hydrophilc agent and a solvent to obtain a mixture, stirring the mixture, filtering the mixture, and carrying out vacuum defoamation on the mixture to obtain a coating feed liquid; flatly crossing and winding a plurality of yarns on a rotary core rod, ultrasonically welding and binding yarn crossed points to form a network tubular enhanced base material, then, downwards moving the network tubular enhanced base material along the core rod and continuously introducing the network tubular enhanced base material into a coating head; and infiltrating the coating feed liquid into the yarns and completely covering the enhanced base material, continuously leaving the coating head and entering a coagulating bath, then, enabling the feed liquid on the surface to exchange with water in the coagulating bath to form a membrane, and finally preparing the in-situ embedded enhanced hollow composite membrane. The preparation method disclosed by the invention is simple and continuous, and capable of realizing industrial production; a stripping phenomenon is avoided, so that the problem that the composite membrane is in insufficient in peel resistance strength is solved; and the in-situ embedded network tubular enhanced base material is relatively low in cost, so that the membrane material cost is finally reduced.

Description

technical field [0001] The invention belongs to the technical field of separation membrane material preparation and reinforcement modification, and relates to a preparation method of in-situ embedding reinforced hollow composite membrane. Background technique [0002] At present, polymer separation membranes have been widely used as an important separation material in the fields of sewage treatment, medicine, beverage, chemical industry, electronics, food and paper making. Hollow fiber membrane has the advantages of large specific surface area, high packing density, small volume, high processing efficiency and simple production process, and is a main membrane material. In order to make the transmembrane resistance low, the wall thickness of the hollow fiber membrane is generally thin (about tens of microns). High-rate porous structure still has the disadvantage of insufficient mechanical strength when applied to high-pressure fluid processing or high-frequency vibration. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/68B01D71/34B01D71/30B01D71/42B01D71/16B01D69/12B01D67/00
Inventor 阮文祥阮万民王建黎陈雷沈宏
Owner 杭州汉膜新材料科技有限公司
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