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A Hydrophobic Modified Black Talc Based Composite Pervaporation Membrane and Its Application

A pervaporation membrane and hydrophobic modification technology, which is applied in the field of hydrophobically modified black talc-based composite pervaporation membranes, can solve the problems of low selectivity and low flux, and achieve simple operation, improved separation performance and high safety Effect

Active Publication Date: 2022-05-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects of low flux or low selectivity in the prior art, the present invention provides a hydrophobically modified black talc-based composite pervaporation membrane, its preparation method and its application in organic matter recovery

Method used

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  • A Hydrophobic Modified Black Talc Based Composite Pervaporation Membrane and Its Application
  • A Hydrophobic Modified Black Talc Based Composite Pervaporation Membrane and Its Application
  • A Hydrophobic Modified Black Talc Based Composite Pervaporation Membrane and Its Application

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preparation example Construction

[0029] The preparation of black talc powder in the following examples:

[0030] 20 mL of acetone solvent was added to 1 g of Jiangxi Guangfeng black talc powder, and then ball-milled at 600 rpm for 6 hours, and then washed and dried to obtain 0.83 g of ultra-fine black talc powder. Through SEM observation, the longitudinal size of the black fossil is 200-1000 μm, and the thickness of a single black talc flake is 1-30 nm).

Embodiment 1

[0032] (1) Hydrophobically modified black talc powder: First, 0.1 g of ultra-fine Jiangxi Guangfeng black talc powder (200-1000 μm, the thickness of a single black talc flake is 1-30 nm) obtained by ball milling was ultrasonically dispersed in 100 mL of organic solvent n-hexane alkane to give 1 mgmL -1 60 mL of black talc dispersion was taken, then 2 mL of n-propyltrimethoxysilane was added to the above dispersion, and the reaction was stirred at 60 °C for 24 h; after the reaction was completed, the solvent hexane was used for washing and centrifugation , and dried at 60°C to obtain 0.0926g of hydrophobically modified black talc powder;

[0033] (2) Preparation of coating liquid: take 0.07624g of modified black talc powder and disperse it in a solvent 10mL of n-heptane by ultrasonic; then add 0.7624g of polydimethylsiloxane (PDMS), 0.0762g of ethyl orthosilicate and 0.0076g of dibutyltin dilaurate were stirred and reacted at room temperature for 4.5h, and then 9.2250g of coat...

Embodiment 2

[0038](1) Hydrophobically modified black talc powder: First, 0.1 g of ultra-fine Jiangxi Guangfeng black talc powder (200-1000 μm, the thickness of a single black talc flake is 1-30 nm) obtained by ball milling was ultrasonically dispersed in 100 mL of organic solvent n-hexane alkane to give 1 mgmL -1 60 mL of black talc dispersion was taken, then 2 mL of n-octyltrimethoxysilane was added to the above dispersion, and the reaction was stirred at 60 °C for 24 h; after the reaction was over, the solvent hexane was used for washing and centrifugation , and dried at 60°C to obtain 0.0958g of hydrophobically modified black talc powder;

[0039] (2) Preparation of coating liquid: take 0.0762g of modified black talc powder and disperse it in a solvent 10mL of n-heptane by ultrasonic; then add 0.7624g of polydimethylsiloxane (PDMS), 0.0762g of ethyl orthosilicate and 0.0076g of dibutyltin dilaurate were stirred and reacted at room temperature for 4.5h, and then 9.2250g of coating liqu...

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Abstract

The invention discloses a black talc-based composite pervaporation membrane, which is prepared according to the following method: firstly, the superfine black talc powder obtained by ball milling is dispersed in an organic solvent A, and then a silane coupling agent is added to react, and the obtained The powder is centrifuged, washed and dried; then the silane coupling agent modified black talc is dispersed in solvent B, then polydimethylsilane is added to stir, and a crosslinking agent is added to react with the catalyst for a period of time; then the obtained The viscous liquid is coated on the surface of the base film, and after being placed at room temperature for a period of time, heat treatment is performed to obtain a composite film. Compared with the PDMS membrane, the black talc-based composite pervaporation membrane has better separation performance, and the permeation flux and separation factor have been significantly improved. Low power consumption, high safety and other advantages.

Description

technical field [0001] The invention belongs to the technical field of functional membrane preparation and separation application, in particular to a hydrophobically modified black talc-based composite pervaporation membrane and its application. Background technique [0002] Alternative renewable biofuels have received much attention in recent years due to the shortage of fossil fuels and environmental concerns. Bioalcohol produced from biomass is widely regarded as a promising alternative energy source due to its energy efficiency and long-term sustainability. However, when the alcohol concentration is high, the fermentation process is usually inhibited, and the alcohol should be recovered from the aqueous solution to improve the alcohol yield. Conventional distillation process is usually used, which has high energy consumption and high production cost. [0003] Pervaporation (PV) has received increasing attention in various fields due to its low energy consumption, high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/36B01D69/12B01D67/00
CPCB01D61/362B01D69/12B01D69/125B01D2325/38
Inventor 张国亮张旭孟琴
Owner ZHEJIANG UNIV OF TECH
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