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Novel RO membrane

A new type of membrane-supporting technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve problems such as high cost and easy clogging, and achieve low cleaning frequency, easy cleaning, anti-pollution performance and self-cleaning powerful effect

Inactive Publication Date: 2020-02-14
杭州未来已来科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] RO membrane can be used to treat various domestic water, process water treatment, industrial wastewater purification (coking water, turbid ring water, etc.), suitable for production and industrial oily wastewater treatment, industrial water treatment and industrial circulating cooling water purification in the water treatment industry , High-purity process water purification, production water treatment, ultrafiltration, reverse osmosis, electrodialysis, pre-filtration before ion exchange resin, reclaimed water reuse treatment, equipment refrigeration, filtration of cooling circulating water, industrial wastewater filtration and purification, river water , well water, lake water, etc., but RO membranes currently available on the market have defects of varying degrees such as high cost and easy clogging

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: the preparation of novel RO membrane

[0019] Source of test material: Hydrophobic methyltrichlorosilane (MeSiCl 3 , MTS, >99%, purchased from Sigma-Aldrich) as precursors, L-(+)-camphorsulfonic acid (CSA, >99%), m-phenylenediamine (MPD, ≥99%, purchased from Sigma-Aldrich) , isoparaffin solvent Isopar G (purchased from ExxonMobil), triethylamine (TEA, ≥99%, purchased from Sigma-Aldrich), m-phenylenediamine (MPD, >99%, purchased from Sigma-Aldrich) , Chloroform (CHCl 3 , ≥99%, purchased from Sigma-Aldrich), 1,3,5-trichlorotricarbonylbenzene (TMC, ≥98%, purchased from Sigma-Aldrich), purchased from Sigma-Aldrich), bovine serum albumin (BSA , ≥96%, purchased from Sigma-Aldrich), sodium alginate (SA, >99%, purchased from Sigma-Aldrich), humic acid (HA, >90%, purchased from Sigma-Aldrich), polysulfone support membrane (PSF support membrane, purchased from Sigma-Aldrich).

[0020] The preparation process of the new RO membrane is as follows: 135mM CSA is com...

Embodiment 2

[0021] Embodiment 2: parameter determination

[0022] During the preparation of the new RO membrane, MTS reacts with amino groups and hydroxyl groups, and an ammonolysis reaction occurs between MTS and amines. Due to the above reactions, MTS is covalently attached to the PA polymer, and MTS is converted into methylsilane through water-mediated Alcohol, the HCl released by MTS during the reaction changes the interfacial polymerization state, which in turn changes the morphology and transport properties of the film. The organic group methyl group can be extended from the PA matrix and introduce the required functions. The methyl group makes the polyamide The surface energy of the membrane is reduced, resulting in greater hydrophobicity. The non-selective voids at the interface of MTS and PA polymers are reduced, and the affinity between water and pore walls is lower, which accelerates the penetration of water.

[0023] The surface roughness of the new RO membrane was measured u...

Embodiment 3

[0027] Example 3: New RO membrane pure water desalination test flux measurement

[0028] The pure water flux and desalination test of the membrane was tested by a cross-flow filtration system at a cross-flow rate of 68L / h at 25°C and different pressures of 5, 10, 15 and 20bar. Before the test, the membrane was placed in Stable for at least 1 h under different pressures. Desalination tests were evaluated with an aqueous feed solution containing 2000 ppm NaCl. The pure water flux J (L·m-2·h-1, LMH) is calculated by J=V / (A×Δt), where V is the permeation volume of the solution, A is the membrane area, and Δt is the permeation time. The pure water permeability coefficient A(LMH / bar) is modeled by linear fx, A=J / ΔP, where ΔP represents different pressures. The test results show that RO-5 membrane permeability increases by about 214% compared to RO-0, and does not affect water / salt selectivity. The RO-2 membrane permeability increased by about 132.5% compared to RO-0 without affec...

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Abstract

The invention provides a novel RO membrane. The novel RO membrane disclosed by the invention has excellent membrane separation performance and anti-pollution performance; the novel RO membrane has theadvantages of high water flux, easiness in cleaning and the like, and can maintain high water flux after cleaning; i.e., the novel RO membrane has strong pollution resistance and self-cleaning performance, and the water flux of the membrane can be greatly recovered even if the membrane is polluted; and the high-water-flux strong-pollution-resistance RO functional membrane is low in cleaning frequency and long in service life.

Description

technical field [0001] The invention relates to the field of RO membranes, in particular to a novel RO membrane. Background technique [0002] RO is the abbreviation of Reverse Osmosis in English, and it means reverse osmosis in Chinese. Generally, the flow mode of water is from low concentration to high concentration. Once the water is pressurized, it will flow from high concentration to low concentration. Micron), generally invisible to the naked eye, bacteria and viruses are 5000 times larger, so only water molecules and some mineral ions can pass through (the passing ions have no loss orientation), and other impurities and heavy metals are discharged from the waste water pipe. All seawater desalination processes and astronaut waste water recycling use this method, so the RO membrane is also called a high-tech "artificial kidney" outside the body. At home and abroad, in medical, military and civilian fields, top-level RO membranes are used for polymer filtration. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/06B01D61/02
CPCB01D61/02B01D71/06B01D71/68
Inventor 周福敬
Owner 杭州未来已来科技有限公司
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