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UIO-66-NH2 doped organosilicon high-salinity wastewater treatment membrane and preparation method thereof

A technology of UIO-66-NH2 and uio-66-nh2, which is applied in the field of composite membranes, can solve the problems of poor film-forming properties of materials and difficulty in preparing molecular separation membranes, and achieve low cost, simple preparation methods and high rejection rates. Effect

Active Publication Date: 2020-06-19
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But UiO-66-NH 2 The film-forming property of the material is poor, and it is difficult to prepare a complete and defect-free UiO-66-NH in a large area 2 molecular separation membrane

Method used

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  • UIO-66-NH2 doped organosilicon high-salinity wastewater treatment membrane and preparation method thereof
  • UIO-66-NH2 doped organosilicon high-salinity wastewater treatment membrane and preparation method thereof
  • UIO-66-NH2 doped organosilicon high-salinity wastewater treatment membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of this implementation example is realized like this, comprises the steps:

[0029] (1) Using bis(triethoxysilyl)ethane (BTESE) as the silicon source precursor and hydrochloric acid as the catalyst, the hydrolysis polymerization reaction was carried out with water in ethanol solution. The molar ratio of BTESE, water, and hydrochloric acid was 1:60:0.2, and the solution was stirred at 40° C. for 2 hours to obtain a BTESE polymeric sol.

[0030] (2) ZrCl 4 and 2-amino-1,4-phthalic acid were dissolved in N,N-dimethylformamide, then ultrasonically stirred for 10min, added acetic acid, ultrasonically stirred for 10min (ZrCl 4 、BDC-NH 2 , HAC, the molar ratio of DMF is 1:1:50:500). Put the prepared mixture into a preheated oven and bake at 130° C. for 24 hours. Finally, the product UiO-66-NH was washed with N,N-dimethylformamide and methanol 2 , dried overnight at 100 °C to give UiO-66-NH 2 crystals.

[0031] (3) UiO-66-NH 2 The crystals were ad...

Embodiment 2

[0034] The preparation method of this implementation example is realized like this, comprises the steps:

[0035] (1) Using bis(triethoxysilyl)ethylene (BTESEthy) as the silicon source precursor and hydrochloric acid as the catalyst, the hydrolytic polymerization reaction was carried out with water in ethanol solution. The molar ratio of BTESEthy, water, and hydrochloric acid was 1:60:0.2, and the solution was stirred at 40° C. for 2 hours to obtain the BTESEthy polymeric sol.

[0036] (2) ZrCl 4 and 2-amino-1,4-phthalic acid were dissolved in N,N-dimethylformamide, then ultrasonically stirred for 10min, added acetic acid, ultrasonically stirred for 10min (ZrCl 4 、BDC-NH 2 , HAC, the molar ratio of DMF is 1:1:50:500). Put the prepared mixture into a preheated oven and bake at 130° C. for 24 hours. Finally, the product UiO-66-NH was washed with N,N-dimethylformamide and methanol 2 , dried overnight at 100 °C. Get UiO-66-NH 2 crystals.

[0037] (3) UiO-66-NH 2 The cryst...

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Abstract

The invention belongs to the technical field of composite membranes, and particularly discloses a UIO-66-NH2 doped organosilicon high-salinity wastewater treatment membrane and a preparation method thereof. According to the membrane, a UIO-66-NH2 metal organic framework material is doped into polymerized organic silica sol, and a UIO-66-NH2 / organic silicon hybrid membrane is formed on the surfaceof a prefabricated ceramic support body through a dipping-pulling method. The UIO-66-NH2 / organic silicon hybrid membrane prepared by the preparation method disclosed by the invention shows high waterpermeability (reaching 1.6*10<-10>m<3> / (m<2>s Pa) and high salt rejection rate (NaCl rejection rate of greater than 99.9%) in pervaporation desalination application, and the membrane structure is stable in the treatment process of high-salt-content wastewater with TDS of more than 5wt%.

Description

technical field [0001] The invention belongs to the technical field of composite membranes, in particular to a preparation method for constructing organic-inorganic hybrid composite membranes with metal-organic framework materials, in particular to a UIO-66-NH 2 Doped organosilicon high-salt wastewater treatment membrane and preparation method thereof. Background technique [0002] How to deal with a large amount of high-salt wastewater generated by industrial activities such as fossil energy extraction, power plant desulfurization, and seawater desalination is the key to achieving zero liquid discharge. Reverse osmosis (RO) desalination technology based on membrane separation has become the most important technology for seawater desalination. However, with the increase of feed salt concentration, the energy consumption of RO desalination process will increase significantly, which limits its application in the field of high-salt wastewater treatment. In recent years, the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70B01D69/02B01D67/00B01D65/10C02F1/44
CPCB01D71/70B01D69/02B01D67/0079B01D65/10C02F1/448B01D69/108B01D69/148B01D67/0006B01D2323/46Y02W10/37Y02A20/131B01D67/0076B01D71/06B01D2221/00
Inventor 徐荣刘倩朱春晖钟璟任秀秀沈敏张亦含
Owner CHANGZHOU UNIV
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