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Hyperbranched polysiloxane multilayer compound film and preparation method thereof

A multi-layer composite membrane, polysiloxane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problem of low separation factor, and achieve simple process, high polymerization efficiency, and improved performance. Effect

Inactive Publication Date: 2016-08-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The special three-dimensional molecular structure of the hyperbranched polymer is introduced into the separation layer of the polysiloxane pervaporation membrane, which greatly improves the flux of the membrane, but the separation factor is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of hyperbranched polysiloxane film:

[0026] 1.5 parts of hyperbranched polysiloxane with a degree of branching of 0.70, 86 parts of n-hexane, and a viscosity of 1×10 3 7.5 parts of cs 107 glue and 0.5 parts of dibutyltin dilaurate were reacted at 60-80°C for 12 hours to form a casting film material solution, and the obtained casting film solution was coated on the polyvinylidene fluoride porous bottom film, static Vulcanize in the air for 2 hours, and then transfer to a forced air oven to dry at 80° C. for 12 hours to obtain a hyperbranched polysiloxane film.

[0027] 2) Preparation of hyperbranched polysiloxane multilayer composite film:

[0028] 1.5 parts of vinyltriethoxysilane, 86 parts of n-hexane, viscosity of 1×10 3 7.5 parts of cs 107 glue and 0.5 parts of dibutyltin dilaurate were reacted at 60-80°C for 6 hours to form a casting film material solution, and the obtained casting film solution was coated on the above-mentioned hyperbranched polys...

Embodiment 2

[0031] 1) Preparation of hyperbranched polysiloxane film:

[0032] 1.5 parts of hyperbranched polysiloxane with a degree of branching of 0.70, 89 parts of n-heptane, and a viscosity of 1×10 3 10 parts of cs 107 glue and 0.5 parts of dibutyltin dilaurate were reacted at 60-80°C for 12 hours to form a casting film material solution, and the obtained casting film solution was coated on the polyvinylidene fluoride porous bottom film, static Vulcanize in the air for 2 hours, and then transfer to a forced air oven to dry at 80° C. for 12 hours to obtain a hyperbranched polysiloxane film.

[0033] 2) Preparation of hyperbranched polysiloxane multilayer composite film:

[0034] 1.5 parts of vinyltriethoxysilane, 89 parts of n-heptane, viscosity of 1×10 3 10 parts of cs 107 glue and 0.5 parts of dibutyltin dilaurate were reacted at 60-80°C for 6 hours to form a casting film material solution, and the obtained casting film solution was coated on the above-mentioned hyperbranched polys...

Embodiment 3

[0037] 1) Preparation of hyperbranched polysiloxane film:

[0038] 2 parts of hyperbranched polysiloxane with a degree of branching of 0.75, 87 parts of n-octane, and a viscosity of 1×10 3 7.5 parts of cs 107 glue and 1.0 part of dibutyltin dilaurate were reacted at 60-80°C for 12 hours to form a casting film material solution, and the obtained casting film solution was coated on the polyvinylidene fluoride porous bottom film, static Vulcanize in the air for 2 hours, and then transfer to a forced air oven to dry at 80° C. for 12 hours to obtain a hyperbranched polysiloxane film.

[0039] 2) Preparation of hyperbranched polysiloxane multilayer composite film:

[0040] The viscosity of 2 parts of vinyltriethoxysilane and 87 parts of n-octane is 1×10 3 7.5 parts of cs 107 glue and 1.0 part of dibutyltin dilaurate were reacted at 60-80°C for 6 hours to form a casting film material solution, and the obtained casting film solution was coated on the above-mentioned hyperbranched po...

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Abstract

The invention relates to a hyperbranched polysiloxane multilayer film and a preparation method thereof. The following process steps are adopted: 1) After reacting hyperbranched polysiloxane, solvent, 107 glue and catalyst at 60-80°C for 12 hours, Form a casting film feed solution, and apply the gained casting film solution on the polyvinylidene fluoride porous base film to obtain a hyperbranched polysiloxane film; 2) vinyltriethoxysilane, solvent, 107 glue, and catalyst After reacting at 60-80° C. for 6 hours, a casting film material solution is formed, which is coated on the above-mentioned hyperbranched polysiloxane film to obtain a hyperbranched polysiloxane multilayer composite film. The hyperbranched polysiloxane multilayer composite membrane prepared by the present invention has a three-layer membrane structure, the bottom layer is a polyvinylidene fluoride ultrafiltration membrane supported by non-woven fabric, the middle layer is a hyperbranched polysiloxane membrane, and the top layer is separated The layer is an extremely thin polysiloxane film. The hyperbranched polysiloxane multilayer composite membrane prepared by the invention has a gradient distribution of porosity from top to bottom, which greatly improves the performance of pervaporation separation of butanol in water.

Description

technical field [0001] The invention belongs to the field of preparation of pervaporation separation membranes, in particular to a novel hyperbranched polysiloxane multilayer composite membrane and a preparation method thereof. Background technique [0002] The increasing depletion and severe pollution of fossil fuels have led to the research and development of biofuels, among which biobutanol is considered to be a second-generation bioenergy with better performance. However, in the process of preparing bio-butanol by fermentation, there is a relatively serious inhibitory effect of butanol on the bacteria, which makes the fermentation process unable to continue, so it is necessary to separate butanol from the fermentation broth in time. The pervaporation process is considered to be the most promising liquid mixture separation process with low energy consumption and high separation efficiency. Some hydrophobic membrane materials have been successively used in the development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D71/70B01D67/00B01D61/36
Inventor 白云翔林佳强张春芳孙余凭顾瑾
Owner JIANGNAN UNIV
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