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Hollow fiber forward osmosis membrane and preparing method thereof

A forward osmosis membrane and forward osmosis technology, applied in the field of hollow fiber forward osmosis membrane and preparation, can solve the problems of low filling rate of membrane modules, small specific surface area, difficult membrane cleaning, etc., and achieve easy cleaning, large effective membrane area, and easy preparation low cost effect

Inactive Publication Date: 2015-12-09
BEIJING E & E TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the forward osmosis membrane modules are flat membranes, which have problems such as small specific surface area, difficult membrane cleaning, and low filling rate of membrane modules.

Method used

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  • Hollow fiber forward osmosis membrane and preparing method thereof

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preparation example Construction

[0026] The present invention also provides a method for preparing a hollow fiber forward osmosis membrane, which includes the following steps: S1: immerse the support tube in a water-phase monomer solution at 20-50 degrees Celsius for 2-480 seconds, and blot the surface layer after taking it out liquid; S2: Then immerse in the organic phase monomer solution at 20-50 degrees Celsius for 2-300 seconds, take it out and blot the liquid on the outer surface; then perform heat treatment in an environment of 50-120 degrees Celsius for 1-30 minutes; S3: treat all The heat-treated support tube is rinsed with deionized water for 20 to 40 seconds to obtain a hollow fiber forward osmosis membrane in the inner support tube; the hollow fiber forward osmosis membrane prepared by this preparation method has a high filling rate, is anti-pollution and is easy to clean. The effective area is large and the permeability is high; at the same time, the preparation method of the hollow fiber forward o...

Embodiment 1

[0030] The first step is to configure the aqueous phase and organic phase solution: take 10g of m-phenylenediamine and 2g of sodium hydroxide and dissolve it in a 150g water tank to configure the aqueous phase solution, and dissolve 10g of isophthaloyl chloride in 190g of n-octane to configure the organic phase solution;

[0031] The second step is to carry out interfacial reaction on the outer surface of the support tube 1 to prepare the nanofiltration separation layer 2: put the support tube into the aqueous phase solution at 25°C for 60 seconds, and then purge the surface of the support tube to remove the excess water phase on the surface solution, and then immersed in the organic phase solution at 25°C for 60 seconds, taken out and entered into the heat treatment channel at 100°C for 1 minute, and then rinsed with deionized water for 30 seconds to prepare the inner support tube hollow fiber forward osmosis membrane, wherein the support tube 1 and forward osmosis membrane 2...

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Abstract

The invention relates to a hollow fiber forward osmosis membrane. The hollow fiber forward osmosis membrane comprises a supporting pipe and a forward osmosis separation layer, wherein the forward osmosis separation layer is arranged in the direction of the external periphery of the supporting pipe, and the supporting pipe is formed by weaving inorganic or organic polymer materials. The invention further relates to a preparing method of the hollow fiber forward osmosis membrane. The preparing method comprises the steps of S1, immersing the supporting pipe in an aqueous-phase monometer solution, taking the supporting pipe out, and then sucking the surface layer dry; S2, immersing the supporting pipe in an organic-phase monomer solution, taking the supporting pipe out, sucking the outer surface dry, and then conducting heat treatment; S3, washing the supporting pipe subjected to heat treatment with deionized water so that the inner supporting pipe hollow fiber forward osmosis membrane can be obtained. The hollow fiber forward osmosis membrane and the preparing method thereof have the advantages that the hollow fiber forward osmosis membrane is high in mechanical property, water permeability and pollution resistance, and according to the preparing method, technology is simple, preparing cost is low, and preparing process is easy to control.

Description

technical field [0001] The invention relates to a hollow fiber forward osmosis membrane and a preparation method. Background technique [0002] Forward osmosis technology is a new type of membrane separation technology developed in recent years. It is a membrane separation process driven by osmotic pressure, that is, water spontaneously diffuses from a higher water chemical potential area (low osmotic pressure side) to a lower water chemical potential area (high osmotic pressure side) through a selective semi-permeable membrane. )the process of. Forward osmosis membrane technology has broad application prospects, and has high application prospects in seawater desalination, brine concentration, food processing, sewage treatment and other fields. Compared with reverse osmosis technology, forward osmosis technology has the following advantages: forward osmosis only needs to overcome the flow resistance, and does not have any requirements for the material of membrane component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D69/08B01D67/00
Inventor 刘洁徐愿坚
Owner BEIJING E & E TECH
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