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Organic-inorganic compound mesoporous membrane and preparation method and application thereof

A composite mesoporous membrane and inorganic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor membrane flexibility, easy cracking, and high cost of porous alumina membranes, and achieve good flexibility, Good acid and alkali resistance

Inactive Publication Date: 2011-08-31
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of this inorganic composite mesoporous membrane are: the cost of the porous alumina membrane used as a raw material is high, and the membrane has poor flexibility, is brittle, and is extremely resistant to decomposition due to decomposition in a weakly acidic or weakly alkaline environment. Stability, especially after the prepared inorganic composite mesoporous membrane is roasted to remove the surfactant, it is more likely to shrink the mesoporous material in the membrane and the membrane is more brittle and easy to crack. Therefore, the inorganic composite mesoporous membrane is used in practical applications. has great limitations

Method used

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  • Organic-inorganic compound mesoporous membrane and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Preparation of organic-inorganic composite mesoporous membrane assembled with mesoporous materials with a pore diameter of 3.0 nm

[0034] Mix 7.68g of absolute ethanol, 11.57g of tetraethyl orthosilicate and 1ml of hydrochloric acid (2.8mmol / L), stir slowly and evenly, condense and reflux for 90min in a water bath at 60°C; then add 15g of absolute ethanol, 1.52 g cetyltrimethylammonium bromide (CTAB), 4ml of hydrochloric acid (55mmol / L) after the mixed solution, stirring reaction at room temperature 25 ℃ for 30min, cooled to room temperature 25 ℃ to obtain the precursor containing CTAB liquid. Using a suction filter pump (produced by Shanghai Mosu Scientific Equipment Co., Ltd., HPD-25 type oil-free suction filter pump) and a standing suction filter device (1000ml suction filter bottle) in the laboratory, the precursor solution of 6ml (containing CTAB) was divided into three times ( 2ml each time) was filtered through a porous polycarbonate membrane (produced by Whatm...

Embodiment 2

[0042] Preparation of organic-inorganic composite mesoporous membrane assembled with mesoporous materials with a pore diameter of 8.0 nm

[0043] 15g of absolute ethanol, 0.10g of hydrochloric acid (12mol / L) and 2.0g of deionized water were mixed uniformly and placed in a three-necked flask, then, under slow stirring, 1.0g of surfactant P123 was added to the mixed solution until P123 was completely dissolved, and the three-necked flask containing the mixed solution was placed in an oil bath, and at a temperature of 60°C, after slowly stirring for 1 h, 2.13 g of tetraethyl orthosilicate was gradually added dropwise, and at 60 ℃ oil bath temperature for 12h with stirring and aging, and then cooled to room temperature to obtain the precursor solution containing P123. Using a suction filtration pump (manufactured by Shanghai Mosu Scientific Equipment Co., Ltd., HPD-25 oil-free suction filtration pump) and a standing suction filtration device (1000 ml suction filtration bottle) in ...

Embodiment 3

[0051] The rhodamine B aqueous solution of 0.04mg / ml and the aqueous solution of 0.04mg / ml horseradish peroxidase were respectively placed in as attached Figure 7-8 Molecular transfer device shown. Investigation of rhodamine B dye molecules (molecular size3.0nm) in organic-inorganic composite mesoporous materials assembled with 3.0nm pore diameter mesoporous materials by ultraviolet-visible spectroscopy Size-selective transfer on membranes.

[0052] by attaching Figure 7 It can be observed that the rhodamine B dye molecule can be transferred through the membrane because its molecular size is smaller than the mesoporous aperture of the mesoporous material in the organic-inorganic composite mesoporous membrane;

[0053] by attaching Figure 8 It was observed that the molecular size of horseradish peroxidase was larger than the mesoporous pore diameter of the mesoporous material in the organic-inorganic composite mesoporous membrane, so the molecule could not be transferred ...

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Abstract

The invention discloses an organic-inorganic compound mesoporous membrane and a preparation method and an application thereof, belonging to the field of membrane materials. The preparation method thereof includes three steps, namely the preparation of precursor solution, the filtration preparation of compound mesoporous membrane and the elution of surface active agent in the membrane, namely thatthe method of filtration is mainly used for assembling inorganic mesoporous materials in pores in a polycarbonate membrane so as to prepare the compound membrane, and the mode of extraction and elution is utilized for eliminating the surface active agent in the compound membrane, thereby obtaining the organic-inorganic compound mesoporous membrane; and the pore diameter of the mesoporous materialin the membrane is 3.0nm or 8.0 nm. Compared with the formerly reported inorganic compound mesoporous membrane, the organic-inorganic compound mesoporous membrane has better flexibility, hard breakage and better acid and alkali resistance. Besides, due to the ordering and the nanometer size effect of the pore diameter of the mesoporous structure, the organic-inorganic compound mesoporous membrane can be applied to the fields of molecular dimension selective transfer, membrane separation, etc.

Description

technical field [0001] The invention relates to an organic-inorganic composite mesoporous membrane, a preparation method and application thereof, and belongs to the field of membrane materials. Background technique [0002] With the wide application of mesoporous materials in the fields of catalytic chemistry and petrochemical industry, the research of assembling mesoporous materials in porous alumina membranes to form inorganic composite mesoporous membranes has attracted people's attention in recent years. "Self-assembly of a silica-surfactant nanocompositein a porous alumina membrane" in the 2004 No. 3 issue of "Nature Materials" published in the UK discloses a method for assembling one-dimensional mesoporous silica in a porous alumina membrane. A method for preparing an inorganic composite mesoporous membrane from a rod. However, the disadvantages of this inorganic composite mesoporous membrane are: the cost of the porous alumina membrane used as a raw material is high,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/00B01D69/12
Inventor 陈勇吴龙沈逸朱瑾瑜甘思文陈安琪
Owner SHANGHAI INST OF TECH
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