High-flux hyperbranched polysiloxane pervaporation membrane and preparation method thereof

A technology of pervaporation membrane and polysiloxane, which is applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology, etc., can solve the problems of lack of high-performance membrane materials and difficulty of permeate flux to meet the requirements of fermentation process, etc. Achieve high permeation flux, stable structure and performance, and good film-forming properties

Active Publication Date: 2012-10-03
WUXI UNMIXED CLEANSE EQUIP
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current problem of pervaporation membranes is the lack of high-performance membrane materials, and the permeation flux of the membrane is often difficult to meet the requirements of the fermentation process.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of large flux hyperbranched polysiloxane pervaporation membrane comprises the following steps, and the described formula ratio is by weight:

[0022] (1) Synthesis of hyperbranched polysiloxane: Mix 15 parts of vinyltriethoxysilane and 2.5 parts of potassium hydroxide in 78.4 parts of tetrahydrofuran, react at 0°C for 6 hours, and then add 4 parts of acetic acid Filter after neutralization to get AB x type monomer solution. Add 0.1 part of dibutyltin dilaurate to the monomer solution, react at 30°C for 36h, and remove the solvent by rotary evaporation at 35°C to obtain hyperbranched polysiloxane.

[0023] (2) Preparation of pervaporation membrane: Mix 5 parts of terminated hydroxymethyl polydimethylsiloxane, 20 parts of hyperbranched polysiloxane, and 0.1 part of dibutyltin dilaurate in 74.9 parts of tetrahydrofuran, And react at 60°C for 24 hours to form a casting solution. The casting solution is evenly coated on the polyacrylonitrile base fi...

Embodiment 2

[0026] The preparation method of large flux hyperbranched polysiloxane pervaporation membrane comprises the following steps, and the described formula ratio is by weight:

[0027] (1) Synthesis of hyperbranched polysiloxane: Mix 40 parts of tetraethoxysilane and 10 parts of sodium hydroxide in 44.5 parts of toluene, react at 10°C for 2 hours, then add 5 parts of hydrochloric acid to neutralize After filtering, get AB x type monomer. Add 0.5 parts of dibutyltin oxide to the monomer solution, react at 100°C for 12h, and remove the solvent by rotary evaporation at 45°C to obtain hyperbranched polysiloxane.

[0028] (2) Preparation of pervaporation membrane: Mix 30 parts of hydroxyethyl-terminated polydimethylsiloxane, 10 parts of hyperbranched polysiloxane, and 0.5 parts of dibutyltin oxide in 59.5 parts of toluene, and mix them in React at 120°C for 12 hours to form a casting solution. The casting solution is evenly coated on the polyvinylidene fluoride base film with an aver...

Embodiment 3

[0031] The preparation method of large flux hyperbranched polysiloxane pervaporation membrane comprises the following steps, and the described formula ratio is by weight:

[0032] (1) Synthesis of hyperbranched polysiloxane: Mix 34.5 parts of tetramethoxysilane and 10 parts of lithium hydroxide in 40 parts of n-hexane, react at 10°C for 2 hours, and then add 15 parts of phosphoric acid and after filtering, get AB x type monomer. Add 0.5 parts of monobutyltin oxide to the monomer solution, react at 100°C for 12h, and remove the solvent by rotary evaporation at 40°C to obtain hyperbranched polysiloxane.

[0033] (2) Preparation of pervaporation membrane: Mix 30 parts of hydroxymethyl-terminated polydiphenylsiloxane, 29.5 parts of hyperbranched polysiloxane, and 0.5 parts of monobutyltin oxide in 40 parts of n-hexane evenly, and React at 120°C for 12 hours to form a casting solution. The casting solution is evenly coated on the polyethersulfone base film with an average pore s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
separation factoraaaaaaaaaa
separation factoraaaaaaaaaa
separation factoraaaaaaaaaa
Login to view more

Abstract

The invention relates to a high-flux hyperbranched polysiloxane pervaporation membrane and a preparation method thereof, and belongs to the technical field of membrane separation. The preparation method for the membrane comprises the following process steps: mixing and reacting hyperbranched polysiloxane, hydroxyl terminated polysiloxane, a catalyst and a solvent to obtain a casting solution, coating the casting solution on a polymer porous basement membrane, and drying to obtain the high-flux hyperbranched polysiloxane pervaporation membrane. The hyperbranched polysiloxane pervaporation membrane prepared by the method has the characteristics of high permeation flux and high swelling resistance; and moreover, the preparation method is simple, convenient to operate, high in production repeatability and high in membrane structure controllability, and the high-flux hyperbranched polysiloxane pervaporation membrane is suitable for removing low-concentration alcohols from water, particularly suitable for separating low molecular alcohols from fermentation liquor.

Description

technical field [0001] The invention relates to a large flux hyperbranched polysiloxane pervaporation membrane and a preparation method thereof, which belong to the technical field of high technology and membrane separation. Background technique [0002] With the increasing depletion of petroleum resources worldwide, the importance of developing renewable energy sources such as ethanol and butanol and other low-molecular-weight alcohols is beyond doubt. In the process of bio-fermentation to prepare fuel low-molecular-weight alcohols, timely removal of low-molecular-weight alcohols from the fermentation broth is the key to obtaining low-molecular-weight alcohol products, reducing the inhibitory effect of low-molecular-weight alcohols on the fermentation process, and making the process continue. Membrane process is a new separation technology with high efficiency and energy saving, especially pervaporation membrane process, its energy consumption is only 1 / 2-1 / 3 of traditional...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/70B01D69/12B01D67/00
Inventor 白云翔朱元华张春芳顾瑾孙余凭
Owner WUXI UNMIXED CLEANSE EQUIP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap