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Metal organic compound filled cross-linked polysiloxane pervaporation membrane and preparation method thereof

A cross-linked polysiloxane and organic compound technology, applied in the field of membrane separation, can solve the problems of difficult simultaneous increase of separation factor and permeation flux, poor repeatability, and short membrane life, achieving good production repeatability, small loss, Good film-forming effect

Inactive Publication Date: 2013-07-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between inorganic particles and polymer materials, the strength of inorganic particle-filled organic polymer pervaporation membranes prepared at present is low. At the same time, the life of the membrane is short and the repeatability is poor. The separation factor and permeation flux of the membrane It is also difficult to simultaneously increase

Method used

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  • Metal organic compound filled cross-linked polysiloxane pervaporation membrane and preparation method thereof
  • Metal organic compound filled cross-linked polysiloxane pervaporation membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a cross-linked polysiloxane pervaporation membrane filled with a metal organic compound comprises the following steps, and the formula ratio is by weight:

[0029] (1) After uniformly mixing 70 parts of hydroxyl-terminated polydimethylsiloxane, 0.15 parts of monobutyltin oxide catalyst, 10 parts of n-hexane, and 15 parts of vinyltriethoxysilane at 25°C, Reaction at ℃ for 3 hours to generate prepolymer;

[0030] (2) Dissolve 3 parts of zinc nitrate and 3 parts of 2-methylimidazole in 100 parts of dimethylformamide, add 3 parts of triethylamine after heating to 80°C, react at 130°C for 6h, precipitate and filter with suction Afterwards, it was dried in an oven at 200°C for 10 hours to obtain a metal organic compound.

[0031] (3) Add 4.85 parts of metal-organic compound to the generated prepolymer, and react at 50°C for 3 hours to become a casting solution;

[0032] (4) Scrape-coat the above-mentioned casting solution on the polysulfone porous bot...

Embodiment 2

[0035] The preparation method of polysiloxane pervaporation membrane filled with metal organic compound comprises the following steps, and the formula ratio is by weight:

[0036] (1) After uniformly mixing 80 parts of hydroxyl-terminated polydimethylsiloxane, 0.1 part of dibutyltin dilaurate, 5 parts of toluene, and 10 parts of tetraethoxysilane at 30 ° C, at 80 ° C React for 1 hour to generate prepolymer;

[0037] (2) Dissolve 3 parts of cobalt nitrate and 12 parts of benzimidazole in 150 parts of dimethylformamide, add 6 parts of triethylamine after heating to 100°C, react at 160°C for 8 hours, and precipitate in the Dry in an oven at 260°C for 14 hours to obtain metal organic compounds.

[0038] (3) Add 4.9 parts of metal-organic compound to the generated prepolymer, and react at 80° C. for 1 hour to become a casting solution;

[0039] (4) Scrape-coat the above-mentioned casting solution on the polyvinylidene fluoride porous base film with a scraper, the thickness of the c...

Embodiment 3

[0042] A method for preparing a cross-linked polysiloxane pervaporation membrane filled with a metal organic compound comprises the following steps, and the formula ratio is by weight:

[0043] (1) After uniformly mixing 75 parts of vinyl-terminated polydiphenylsiloxane, 0.5 parts of dibutyltin oxide, 9 parts of tetrahydrofuran, and 12 parts of divinylbenzene at 27 ° C, react at 60 ° C for 2 hours generate prepolymers;

[0044] (2) Dissolve 3 parts of zinc nitrate and 5 parts of imidazole in 120 parts of dimethylformamide, add 4 parts of triethylamine after heating to 90°C, react at 140°C for 7 hours, precipitate and filter in an oven Dry at 240°C for 13 hours to obtain a metal organic compound.

[0045] (3) Add 3.5 parts of metal-organic compound to the generated prepolymer, and react at 60° C. for 2 hours to become a casting solution;

[0046] (4) Scrape-coat the above-mentioned casting solution on the polyethersulfone porous bottom membrane with a scraper, the thickness o...

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Abstract

The invention relates to a metal organic compound filled cross-linked polysiloxane pervaporation membrane and a preparation method thereof, and belongs to the field of membrane separation. The method comprises the following steps of: mixing a cross-linking agent, a catalyst, linear polysiloxane and a solvent, reacting to generate prepolymer, adding a metal organic compound, and performing cross-linking reaction to obtain a membrane casting solution; and coating the membrane casting solution on a macromolecular porous bottom membrane, drying, and heating to obtain a product, namely the metal organic compound filled cross-linked polysiloxane pervaporation membrane. The metal organic compound filled cross-linked polysiloxane pervaporation membrane prepared by the method has the characteristics of high permeation flux, good separation effect, high strength, stable structure and the like, is suitable for removing low-concentration organic compounds from water, and is particularly suitable for separating low molecular alcohol from a fermentation solution.

Description

technical field [0001] The invention relates to a metal organic compound filled crosslinked polysiloxane pervaporation membrane and a preparation method thereof, belonging to the technical field of membrane separation. Background technique [0002] Affected by world oil resources, prices, environmental protection and global climate change, the development of biofuels has become an important measure for many countries to improve energy security, reduce greenhouse gas emissions, and address climate change. As one of biofuels, fuel low molecular alcohols such as ethanol and butanol are renewable and clean energy sources that are promising to replace petroleum. In the process of producing alcohol by biological fermentation, if the low-molecular-weight alcohol can be removed in time, not only the low-molecular-weight alcohol product can be obtained, but also its inhibitory effect on the fermentation process can be reduced, so that the process can continue. Due to the low content...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/70B01D67/00
Inventor 白云翔董亮亮张春芳顾瑾孙余凭
Owner JIANGNAN UNIV
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