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Thin film composite membranes for forward osmosis, and their preparation methods

A technology of forward osmosis membrane and composite membrane, applied in the field of forward osmosis membrane

Active Publication Date: 2013-06-05
海绵股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it remains a problem to provide high water flux in combination with other desirable membrane properties (e.g., low solute flux, fouling resistance, good machinability, etc.)

Method used

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  • Thin film composite membranes for forward osmosis, and their preparation methods
  • Thin film composite membranes for forward osmosis, and their preparation methods
  • Thin film composite membranes for forward osmosis, and their preparation methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 concerns the fabrication of flat sheet membranes according to the method of the invention and the performance comparison of these membranes with commercially available FO membranes.

Embodiment 2

[0024] Example 2 concerns the configuration of incorporated carbon nanotubes in the support layer.

Embodiment 3

[0025] Example 3 involved an acrylate-modified poly(vinylidene fluoride) polymer support layer (other examples involved meta-aramid support layers).

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Abstract

Forward osmosis membranes having a hydrophilic support layer and a polyamide rejection layer in a thin film composite membrane are considered. Preferred support layer materials include aramid polymers and PVDF. A woven or non-woven mesh can be incorporated into the support layer to improve handling properties of the membrane. Flat sheet and hollow fiber configurations are possible. Antifouling techniques are provided. The polyamide layer can be formed on the hydrophilic support layer by interfacial polymerization. Applications include forward osmosis and pressure retarded osmosis applications, such as industrial product and / or waste concentration, hydration bags, energy / pressure generation, and controlled delivery of chemicals (e.g., for pharmaceutical applications).

Description

technical field [0001] The present invention relates to membranes for forward osmosis. Background technique [0002] Forward osmosis is the process of moving water from a solution with a higher water concentration (feed solution) to a solution with a lower water concentration (draw solution). Membranes for forward osmosis and related processes for pressure retarded osmosis have been studied for many years. However, it remains a problem to provide high water flux in combination with other desirable membrane properties (eg, low solute flux, fouling resistance, good machinability, etc.). It would therefore be an advancement in the art to provide improved membranes for forward osmosis and pressure retarded osmosis. Contents of the invention [0003] Thin film composite membranes are used to provide improved forward osmosis (FO) and pressure retarded osmosis (PRO) performance. These membranes include a hydrophilic support layer, which is preferably porous. At least one poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D69/12B01D61/02B01D71/34
CPCB01D69/12C02F1/445B01D69/125F04B19/00B01D61/002B01D67/0006B01D61/025B01D2323/38B01D69/08B01D69/148B01D69/06B01D71/44B01D67/0079B01D71/34B82Y30/00B01D71/56F04B17/00B01D69/105B01D71/021B01D67/0093B01D2323/40B01D69/1251B01D71/441B01D67/00791B01D69/1216B01D71/0212
Inventor R·列瓦努鲁一畯J·E·克拉尔A·诺伊O·巴卡金
Owner 海绵股份有限公司
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