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Preparation method for organic inorganic composite ceramic nanofiltration membrane

A ceramic nanofiltration membrane, inorganic composite technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as easy swelling and degradation, poor solvent resistance, and intolerant high temperature operating conditions

Active Publication Date: 2019-07-23
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, organic nanofiltration membranes are widely used in the concentration and separation of drugs, reuse of reclaimed water, wastewater treatment, and purification of drinking water. Swelling and degradation, high temperature resistance and high operating conditions are required, and the current main research direction is to use cross-linking agents and add polymer blends to improve the solvent resistance and membrane stability of nanofiltration membranes

Method used

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  • Preparation method for organic inorganic composite ceramic nanofiltration membrane
  • Preparation method for organic inorganic composite ceramic nanofiltration membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0023] 1. Membrane tube treatment

[0024] Ultrasound the cut 10nm alumina ceramic membrane tube with a length of about 50cm for 2h, soak it in 1mol / L sodium hydroxide solution for 5h, dry it at 100°C for 24h, and soak it in 3-aminopropanol with a concentration of 2mmol / L after cooling. In the ethyl triethoxysilane ethanol solution, react at room temperature for 12 hours, then rinse with ethanol and deionized water several times in turn, put it in an oven and dry it for 12 hours at a set temperature of 150°C, and then cool in the furnace

[0025] 2. Nanofiltration membrane preparation

[0026] Step 1. Soak the treated membrane tube in a TMC n-hexane solution with a mass fraction of 5 wt%, take it out after reacting at room temperature for 3 minutes, soak it in water and dry it with an air gun;

[0027] Step 2. Soak the membrane tube in an aqueous phase solution containing 10 wt% piperazine, 1 wt% glycerin and 1 wt% sodium phosphate, react at room temperature for 3 minutes, ta...

Embodiment 2

[0033] 1. Membrane tube treatment

[0034] Ultrasound the cut 50nm titanium oxide ceramic membrane tube with a length of about 50cm for 2h, soak it in 1mol / L potassium hydroxide for 10h, dry it at 100°C for 24h, and soak it in 3-aminopropyl with a concentration of 5mmol / L after cooling. In the ethanol solution of triethoxysilane, react at room temperature for 12 hours, then rinse with ethanol and deionized water several times in turn, put it in an oven and dry it at the temperature setting value of 150°C for 12 hours, then cool in the furnace

[0035] 2. Nanofiltration membrane preparation

[0036] Step 1. Soak the treated membrane tube in a TMC n-hexane solution with a mass fraction of 1 wt%, take it out after reacting at room temperature for 10 minutes, soak it in water and dry it with an air gun;

[0037] Step 2. Soak the membrane tube in an aqueous phase solution containing 5wt% piperazine, 1wt% ethylene glycol and 1wt% sodium polyacrylate, react at room temperature for 1...

Embodiment 3

[0043] 1. Membrane tube treatment

[0044] Ultrasound the cut 5nm titanium oxide ceramic membrane tube with a length of about 50cm for 5h, soak it in 1mol / L sodium hydroxide for 10h, dry it at 100°C for 24h, cool it and soak it in 10mmol / L 3-aminopropyl In the ethanol solution of triethoxysilane, react at room temperature for 12 hours, then rinse with ethanol and deionized water several times in turn, put it in an oven and dry it at the temperature setting value of 150°C for 12 hours, then cool in the furnace

[0045] 2. Nanofiltration membrane preparation

[0046] Step 1. Soak the treated membrane tube in a TMC n-hexane solution with a mass fraction of 0.5 wt%, take it out after reacting at room temperature for 15 minutes, soak it in water and dry it with an air gun;

[0047] Step 2. Soak the membrane tube in an aqueous solution containing 1 wt% piperazine, 1 wt% polyethylene glycol and 1 wt% sodium polyacrylate, react at room temperature for 15 minutes, take it out, soak in...

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Abstract

The invention discloses a preparation method for an organic inorganic composite ceramic nanofiltration membrane. The preparation method comprises the following steps: grafting 3-aminopropyl triethoxysilane on an alkali activated ceramic membrane; taking piperazine as an aqueous phase monomer, trimesoyl chloride as an organic phase monomer and sodium phosphate or organic diamine as an acid accepting agent; forming an organic functional layer on the surface of the ceramic membrane through interfacial polymerization reaction under the action of an additive, thereby acquiring the organic inorganic composite ceramic nanofiltration membrane. In the invention, an inorganic ceramic monomer is used as a stable base of an organic nanofiltration membrane, is capable of supplying enough chemical andthermal stability and is capable of resisting against solvent and high temperature.

Description

technical field [0001] The invention belongs to the technical field of nanofiltration membrane preparation, and in particular relates to a method for preparing an organic-inorganic composite ceramic nanofiltration membrane. Background technique [0002] Nanofiltration is a membrane separation technology with performance between ultrafiltration and reverse osmosis, which can be used for the separation of divalent salts and monovalent salts. Its research began in the late 1970s and was developed by reverse osmosis membranes. of. At present, the nanofiltration membranes on the market are mainly organic nanofiltration membranes, because the surface of the membrane is rich in charges, and the ions in the solution are intercepted through the combined action of electrostatic repulsion and steric hindrance, thus having high selective separation. Its preparation methods mainly include phase inversion method, interfacial polymerization method, layer-by-layer assembly method, chemical...

Claims

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Application Information

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IPC IPC(8): B01D61/02B01D69/12B01D67/00B01D65/10
CPCB01D61/027B01D65/10B01D67/0079B01D67/0083B01D69/12B01D69/125B01D2321/2075B01D2321/28
Inventor 陈云强洪昱斌蓝伟光
Owner SANDA FILM SCI & TECH XIAMEN
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