PDMS/PEI (Polydimethylsiloxane/Polyetherimide) separating membrane and preparation and application thereof

A technology for separating membranes and mass fractions, which is applied in the field of membrane materials and can solve problems such as increasing costs, reducing service life, and membrane damage

Active Publication Date: 2012-05-02
NANJING TIANMO TECH CO LTD
View PDF2 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, polydimethylsiloxane (PDMS) is the most widely used membrane material for VOCs separation in foreign laboratories. Since the permeability of VOCs gas in the PDMS membrane layer is much higher than that of inert gases, good results have been obtained. separation effect, but currently there are very few domestic manufacturers that can industrialize, and the reported preparation metho

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

[0068] A. Preparation of Silicone Emulsion

[0069] Fully dissolve 277.2g of dodecylbenzenesulfonic acid with 2557.8g of water, weigh 3465g of D4, and add it into the mixed solution of dodecylbenzenesulfonic acid solution and keep stirring.

[0070] The mixed solution needs to be filtered through a 120-mesh filter. Use a homogenizer to homogenize and emulsify the mixed solution for 2-3 times. It must be ensured that the mixed solution entering the homogenizer is uniform, and it needs to be stirred continuously before entering the homogenizer. Silicone emulsion is milky white with bluish appearance.

[0071] The emulsion is placed in a sealed container and stored at room temperature for 2 weeks.

[0072] Detection method: take about 50ml sample and place it in a glass beaker, and observe visually from the side and the bottom under natural light. Indicators: milky white with bluish emulsion, no mechanical impurities. The viscosity of the emulsion was measured by a viscometer ...

Embodiment 2

[0083] A. Preparation of Silicone Emulsion

[0084] Fully dissolve 120.9 g of octadecyltrimethylammonium bromide with 3155.1 g of water, weigh 3024 g of D4, add it into the octadecyltrimethylammonium bromide solution and keep stirring.

[0085] The mixed liquid needs to be filtered through a 100-mesh filter. Use a homogenizer to homogenize and emulsify the mixed liquid for 2-3 times. It must be ensured that the mixed liquid entering the homogenizer is uniform, and it needs to be stirred continuously before entering the homogenizer. Silicone emulsion is milky white with bluish appearance.

[0086] The emulsion is placed in a sealed container and stored at room temperature for 3 weeks.

[0087] Detection method: take about 50ml sample and place it in a glass beaker, and observe visually from the side and the bottom under natural light. Indicators: milky white with bluish emulsion, no mechanical impurities. It was determined that the molecular weight of the silicone emulsion w...

Embodiment 3

[0097] A. Preparation of Silicone Emulsion

[0098] Fully dissolve 103.6g TX-10 with 2920.4g water, weigh 3276g D4, add it into the TX-10 solution and keep stirring.

[0099] The mixed liquid needs to be filtered through a 100-mesh filter. Use a homogenizer to homogenize and emulsify the mixed liquid for 2-3 times. It must be ensured that the mixed liquid entering the homogenizer is uniform, and it needs to be stirred continuously before entering the homogenizer. Silicone emulsion is milky white with bluish appearance.

[0100] The emulsion is placed in a sealed container and stored at room temperature for 6 weeks.

[0101] Detection method: take about 50ml sample and place it in a glass beaker, and observe visually from the side and the bottom under natural light. Indicators: milky white with bluish emulsion, no mechanical impurities. It was determined that the molecular weight of the silicone emulsion was 320,000.

[0102] B. Silicone rubber

[0103] raw materi...

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

No PUM Login to view more

Abstract

The invention belongs to the field of membrane materials and discloses a PDMS/PEI (Polydimethylsiloxane/Polyetherimide) separating membrane and a preparation method of the separating membrane as well as the application of the separating membrane. The preparation method comprises the following steps of: preparing high polymer emulsion of organic silicon by adopting an emulsion polymerization method, further crosslinking into silicone rubber under the effects of a catalytic agent and a cross-linking agent, and forming the PDMS/PEI composite membrane on a basement membrane through high temperature curing. The siloxane prepared by the preparation method has high molecular weight; the prepared membrane has smooth and compact surfaces without defects and is tightly combined with PEI. The membrane prepared by the method is pollution-free and non-toxic. The prepared separating membrane is used for separating and recovering organic gases, thereby higher selectivity is obtained.

Description

technical field [0001] The invention belongs to the field of membrane materials and relates to a novel high-efficiency organic gas separation membrane and its preparation method and application, in particular to a PDMS / PEI separation membrane and its preparation method and application. Background technique [0002] A large amount of volatile organic vapors (VOCs) will be produced during the refining, storage and transportation of petroleum, which not only causes a large amount of waste of petroleum resources and huge economic losses, but also directly endangers the safety of human life and the living environment. increasingly people's attention. It is estimated that in 2005, the VOCs emissions from gas stations alone in my country reached 314×10 3 t, the resulting economic loss has reached 1.26 billion yuan, and the VOCs emissions will reach 1196×10 by 2030 under the condition of maintaining the current control level. 3 t, and the current market oil price keeps rising, ass...

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
IPC IPC(8): B01D69/12B01D71/70B01D71/60B01D67/00B01D53/22
Inventor 赵新张丽晓韩穗奇
Owner NANJING TIANMO TECH CO LTD
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