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A kind of non-woven fabric based forward osmosis membrane and its preparation method and application

A forward osmosis membrane and non-woven fabric-based technology, which is applied in the field of non-woven fabric-based forward osmosis membrane and its preparation, can solve the problems of water flux and permeability that need to be further improved, and achieve high strength, good physical properties, and improved flux effect

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its water flux and permeability need to be further improved.

Method used

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  • A kind of non-woven fabric based forward osmosis membrane and its preparation method and application
  • A kind of non-woven fabric based forward osmosis membrane and its preparation method and application
  • A kind of non-woven fabric based forward osmosis membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of non-woven fabric support layer: the fiber raw material is mixed with water according to the fiber composition listed in Table 1, beating, and diluted to 0.05wt%, to obtain a slurry, and the gained slurry is loaded into an inclined wire paper machine, and passed through a wet process The papermaking process is used to form a non-woven fabric support layer. The basic properties of the resulting nonwoven support layer are shown in Table 2.

[0036] (2) Preparation of aqueous phase solution and oil phase solution: the aqueous phase solution solvent is deionized water, the solute is m-phenylenediamine and polyethyleneimine, and the concentration is 20g / L and 1.0g / L respectively, and the pH value of the aqueous phase solution adjusted to 10.5; the solvent of the oil phase solution is n-hexane, the solute is trimesoyl chloride, and the concentration is 1.0g / L.

[0037](3) Interfacial polymerization to obtain the polyamide active layer: add an appropriate am...

Embodiment 2

[0039] Compared with Example 1, the preparation method of a non-woven fabric-based forward osmosis membrane in this example is different in that the concentration of polyethyleneimine in the aqueous phase solution is 2.0 g / L, and the remaining steps and parameters are exactly the same .

Embodiment 3

[0041] Compared with Example 1, the method for preparing a non-woven fabric-based forward osmosis membrane in this example differs in that the concentration of phenylenediamine in the aqueous phase solution is 25 g / L, and the rest of the steps and parameters are identical.

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Abstract

The invention belongs to the technical field of filtering materials, and discloses a non-woven cloth based forward osmosis membrane as well as a preparation method and application thereof. The non-woven cloth based forward osmosis membrane comprises a non-woven cloth support layer and a polyamide active layer, wherein the polyamide active layer is compounded on the non-woven cloth support layer; the quantity of the non-woven cloth support layer is 5-40 g / m<2>; the thickness of the non-woven cloth support layer is 10-55 [mu]m; the average aperture of the non-woven cloth support layer is 5-35 [mu]m; the porosity of the non-woven cloth support layer is greater than or equal to 80%. Wet-method non-woven cloth is used as a support layer material, and the polyamide active layer is prepared from a water-phase solution with alkylated fatty amine or a multi-functional amino compound and an oil-phase solution with an acid chloride compound on the wet-method non-woven cloth via upper-interface polymerization. The water flux of the forward osmosis membrane disclosed by the invention is as high as 80.9 L / (m<2>*h), and the salt retention rate of the forward osmosis membrane is greater than or equal to 97%. The water flux of the forward osmosis membrane is far higher than that of a conventional commercial forward osmosis membrane, and meanwhile a high salt retention rate is maintained. The forward osmosis membrane can be applied to fields such as sweater treatment and wastewater recycling.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and in particular relates to a non-woven fabric-based forward osmosis membrane and a preparation method and application thereof. Background technique [0002] Forward osmosis technology is a spontaneous membrane separation technology without external pressure. During the separation process, the osmotic pressure difference between the solutions on both sides is used as the driving force to achieve membrane separation. Compared with reverse osmosis and other membrane separation technologies, forward osmosis can be carried out at room temperature without external driving pressure, which can effectively reduce membrane pollution, reduce energy consumption, and be more environmentally friendly. However, the development of forward osmosis technology is currently restricted, and the main bottleneck is the lack of suitable high-performance forward osmosis membranes. In the process of forward os...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/10B01D71/56C02F1/44C02F103/08
CPCB01D67/0006B01D69/105B01D71/56C02F1/445C02F2103/08Y02A20/131
Inventor 王习文杨华宇
Owner SOUTH CHINA UNIV OF TECH
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