Unlock instant, AI-driven research and patent intelligence for your innovation.

A green preparation method of silicone rubber/metal organic compound pervaporation membrane based on emulsion film formation

An organic compound and pervaporation membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as waste of resources, potential safety hazards, environmental pollution, etc., and achieve low production costs, stable structure, and high production efficiency. good repeatability

Active Publication Date: 2019-02-22
JIANGNAN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent evaporation method needs to volatilize a large amount of organic solvent (about 80wt%) during the preparation of organic silicon pervaporation membrane, which will not only cause serious environmental pollution, but also a waste of resources. In addition, a large amount of organic solvent dispersed in the production environment Organic vapors also pose a huge safety hazard

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

[0018] A green preparation method of silicone rubber / metal organic compound pervaporation membrane based on emulsion film formation, comprising the following steps, the formula ratio is by weight: (1) 0.2 parts of polyether type silicone nonionic surfactant Dissolve in 10 parts of water at 20°C, and then mix and stir with 60 parts of hydroxyl-terminated polydimethylsiloxane at a rate of 200r / min for 3h to obtain a polysiloxane emulsion, and the droplet size of the dispersed phase is 50μm; (2) Add 1 part of tetraethoxysilane, 0.1 part of dibutyltin dilaurate, and 1 part of ZIF-8 to the above emulsion, and mix and react at 20°C for 2 hours to form an emulsion-type casting solution; uniformly mix the casting solution Scratch coating on polyvinylidene fluoride ultrafiltration membrane with a coating thickness of 100 μm, place it at room temperature for 12 hours, volatilize and remove the water phase droplets, put it in a 60°C oven for cross-linking reaction for 12 hours, and then o...

Embodiment 2

[0021] A green preparation method of silicone rubber / metal organic compound pervaporation film based on emulsion film formation, comprising the following steps, the formula ratio is by weight: (1) adding 0.45 parts of anionic polysiloxane phosphate ester salt to the surface The active agent was dissolved in 15 parts of water at 20°C, and then mixed and stirred with 65 parts of hydroxyl-terminated polydiphenylsiloxane at a rate of 300r / min for 2 hours to obtain a polysiloxane emulsion, and the droplet size of the dispersed phase was 40 μm; ( 2) Add 2 parts of vinyltriethoxysilane, 0.2 parts of monobutyltin oxide, and 2 parts of ZIF-7 into the above emulsion, and mix and react at 25°C for 1.5 hours to form an emulsion casting solution; Scrape evenly on the polyvinylidene fluoride ultrafiltration membrane, the coating thickness is 100μm, place at room temperature for 12 hours to volatilize and remove the water phase droplets, then put it in a 60°C oven for 24 hours for cross-linki...

Embodiment 3

[0024] A green preparation method of silicone rubber / metal organic compound pervaporation membrane based on emulsion film formation, comprising the following steps, the formula ratio is in parts by weight: (1) 0.5 parts of cationic polysiloxane quaternary ammonium salt surface The active agent was dissolved in 15 parts of water at 25°C, and then mixed and stirred with 65 parts of vinyl-terminated polydimethylsiloxane at a rate of 500 r / min for 2 hours to obtain a polysiloxane emulsion, and the droplet size of the dispersed phase was 20 μm; (2) Add 2 parts of vinyltriethoxysilane, 0.3 parts of dibutyltin oxide, and 3 parts of ZIF-71 into the above emulsion, and mix and react at 25°C for 2 hours to form an emulsion casting solution; The membrane liquid is uniformly scraped and coated on the polyvinylidene fluoride ultrafiltration membrane with a coating thickness of 150 μm. It is placed at room temperature for 12 hours. After the water phase droplets are removed by volatilization...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a green preparation method of a silicon rubber / organometallic compound pervaporation separating membrane based on membrane forming of emulsion, and belongs to the technical field of membrane separation. The green preparation method is mainly characterized by comprising the following steps: (1) mixing and emulsifying water, a surface active agent and polysiloxane to prepare water-in-oil type polysiloxane emulsion, wherein the diameter of aqueous-phase droplets is 1-50mum; and (2) adding an organometallic compound, a catalyst and a crosslinking agent and mixing to obtain emulsion type membrane casting liquid, coating the emulsion type membrane casting liquid onto a polyvinylidene-fluoride ultrafiltration membrane, drying, and crosslinking to obtain the silicon rubber / organometallic compound pervaporation separating membrane. The green preparation method has the advantages that on the basis of the membrane forming technology of emulsion, no organic solvent is added in the membrane preparation process, so that no volatile organic vapor is generated and the green and environment-friendly idea is followed. The prepared silicon rubber / organometallic compound pervaporation separating membrane has the characteristics of large permeation flux, good separating effect and stable structure and the like, is suitable for removing low-concentration organic matters in water, and is especially applicable to separating low-molecular alcohol from fermentation liquid.

Description

technical field [0001] The invention relates to a green preparation method of a silicone rubber / metal organic compound pervaporation membrane based on emulsion film formation, and belongs to the field of high technology and membrane separation technology. Background technique [0002] Pervaporation is a new membrane separation technology process that utilizes the properties of different dissolution and diffusion rates of components in a liquid mixture to achieve separation. Compared with the traditional separation technology, the pervaporation process has the advantages of good separation performance, low energy consumption, no pollution to the environment, and simple process, and has become one of the most promising separation technologies today. The application of pervaporation separation technology includes three aspects: dehydration of organic matter, recovery of valuable organic matter in water, and separation of organic / organic systems. Among them, the removal of low-c...

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 Patents(China)
IPC IPC(8): B01D71/70B01D67/00B01D61/36
Inventor 白云翔唐郡陈德强张春芳孙余凭顾瑾
Owner JIANGNAN UNIV