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Reverse osmosis separating membrane with excellent antiscaling nature, method for mfg. same

A separation membrane and reverse osmosis technology, applied in semipermeable membrane separation, reverse osmosis, chemical instruments and methods, etc.

Inactive Publication Date: 2003-03-12
SAEHAN INDS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of the existing reverse osmosis separation membrane, especially in order to fundamentally prevent the fouling phenomenon of the separation membrane during use. The present invention provides a nano-scale TiO with photocatalytic properties 2 Particles are bound to the separation membrane in a fixed form (incorporate), and the separation membrane itself has a novel reverse osmosis separation membrane with excellent anti-fouling properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1ml of Ti[OCH(CH 3 ) 2 ] 4 After completely dissolving in 20ml of ethanol, slowly drop it into 20ml of stirred aqueous solution of pH 1.5 to carry out hydrolysis reaction to obtain transparent TiO 2 aqueous solution.

[0021] TiO obtained by rotary evaporation (rotavapor) 2 The aqueous solution was evaporated at 35°C and dried in a vacuum oven at 60°C for 1 hour to obtain a white powder TiO 2 After the particles are dissolved in water at a certain ratio (0.5g / L), the pH is adjusted to 2.8 to obtain a stable TiO 2 Dispersions.

[0022]Make 2% by weight of MPD (m-phenylenediamine) aqueous solution and 0.1% by weight of TMC (trimesyl chloride) (trimesoyl chloride) solution dissolved in organic solvent to carry out interfacial polymerization, the polyamide reverse osmosis composite membrane obtained will be immersed in The stabilized TiO 2 Dispersion solution for 1 hour, prepared with TiO 2 reverse osmosis separation membrane.

Embodiment 2

[0024] Make the white powder TiO in Example 1 2 Particles are dissolved in water at a certain ratio (0.5g / L), except that the pH is adjusted to 10, the others are the same as in Example 1, and TiO is combined with TiO 2 reverse osmosis separation membrane.

Embodiment 3

[0026] Make Ti[OCH(CH 3 ) 2 ] 4 Hydrolysis to produce TiO 2 During the aqueous solution, except adding 0.1g of LiOH, others are the same as in Example 1, and the obtained compound is combined with TiO 2 reverse osmosis separation membrane.

[0027] Measure the TiO synthesized in Examples 1, 2, and 3 according to Transmission Electron Microscopy and Ultraviolet-visible Spectroscopy. 2 Particles, the measurement results show that all the synthesized nano-scale particles are below 10nm.

[0028] Measure the TiO that embodiment 1 synthesizes 2 Combined with reverse osmosis membrane and TiO 2 The flow rate and salt removal rate combined with the reverse osmosis composite membrane, and the measurement results are shown in Table 1.

[0029] sample

[0030] In order to evaluate the antibacterial properties of the reverse osmosis separation membrane of the present invention, under ultraviolet light, the TiO 2 Particle separation membrane and bound TiO 2 Cultivate a c...

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PUM

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Abstract

A reverse-osmosis separating membrane with high resitance to scale deposit is prepared through hydrolyzing Ti compound in acidic aqueous solution to generate TiO2 nanoparticles, dispersing them in anaqueous solution (pH=1-6 or 9-13), and dipping the reverse-osmosis separating membrane in it for fixing said TiO2 nanoparticles on it.

Description

technical field [0001] The present invention relates to a reverse osmosis separation membrane having excellent anti-fouling properties. More specifically, the present invention relates to a representative photocatalyst, TiO 2 , A reverse osmosis separation membrane in the shape of a nanostructure in which nanometer-sized particles are combined on the surface structure of the separation membrane and a manufacturing method thereof. Background technique [0002] Reverse osmosis separation membranes are usually used in various fields such as seawater desalination, wastewater treatment, ultra-pure water production, and household water purification treatment. The main purpose of this research in the field of reverse osmosis is to increase the water permeability of the separation membrane and improve the desalination efficiency. A typical example is a new polyamide reverse osmosis composite membrane proposed by Tomashke of US Patent No. 4,872,984 and Chau of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D61/02B01D67/00B01D69/12B01D69/14B01J21/06B01J35/02
CPCB01D2325/48B01D69/141B01D69/125B01D67/0088B01D69/1251B01D69/14111
Inventor 郭承烨金圣镐金淳植
Owner SAEHAN INDS CO LTD
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