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Polymer porous membrane as well as preparation method and application thereof

A polymer and porous membrane technology, applied in the direction of mixing methods, chemical instruments and methods, dissolution, etc., can solve the problems of reduced uniformity of emulsion droplet or microsphere size, single group, hydrophobic and easy to fall off, etc.

Active Publication Date: 2014-06-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is an insurmountable problem in the modification process: the surface group of SPG membrane is single, only silanol can be modified, and octadecyltrichlorosilane (Octadecyltrichlorosilane), n-octyltriethoxysilane (n -octyltriet-hoxysilane) and other silane coupling agents with hydrophobic chains react with the silanol groups on the surface of the SPG membrane to bring hydrophobic groups on the surface (Journal of Colloid and Interface Science300(2006), 375-382), while based on The Si-O- or Si-C-linked hydrophobic layer is unstable, especially under alkaline conditions, the hydrophobicity is easy to fall off, resulting in inhomogeneous membrane surface properties, which seriously reduces the size uniformity of emulsion droplets or microspheres during the membrane emulsification process , the emulsifying effect becomes worse
[0003] In response to this problem, there are few researches at home and abroad, and most of them focus on the improvement of membrane hydrophobic modification methods.

Method used

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  • Polymer porous membrane as well as preparation method and application thereof
  • Polymer porous membrane as well as preparation method and application thereof
  • Polymer porous membrane as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0065] Reagents and solvents:

[0066] The polymer monomer is E51 epoxy resin, the porogen is a mixture of dimethyl sulfoxide (DMSO) and polyethylene glycol 300, the crosslinking agent is 4,4'-diaminodicyclohexylmethane, and the replacement solvent is desiccant ionized water.

[0067] Preparation process of polymer porous membrane:

[0068] Add E51 type epoxy resin, DMSO, PEG300, 4,4'-diaminodicyclohexylmethane with a molar ratio of 10:5:105:1 into the container and mix evenly, put it into the reaction container and seal it, at 30°C The polymerization reaction took place for 72 hours, and after the reaction was completed, the soluble matter such as the porogen was removed by extracting with deionized water, and a polymer porous membrane with a three-dimensional double continuous through-pore structure was obtained.

[0069] The microscopic morphology of the polymer porous membrane prepared above was observed with a scanning electron microscope. The result is as figure 1 As...

Embodiment 2

[0072] Reagents and solvents:

[0073] The polymerized monomer is 1,1,2,2-tetrakis[P-(2,3-epoxypropoxy)phenyl]ethane, and the porogen is N,N dimethylformamide (DMF) and ring Oxygenated soybean oil mixture, the crosslinking agent is 1,2-ethylenediamine, and the replacement solvent is dichloromethane.

[0074] Preparation process of polymer porous membrane:

[0075] 1,1,2,2-Tetrakis[P-(2,3-epoxypropoxy)phenyl]ethane, DMF, epoxidized soybean oil and 1, 2-Ethylenediamine was added into the container and mixed evenly, put into the reaction container and sealed, and the polymerization reaction occurred at 60°C for 10 hours. After the reaction was completed, the soluble matter such as porogen was removed by dichloromethane extraction, and the three-dimensional bismuth A polymer porous membrane with a continuous through-pore structure.

[0076] Observing the microscopic morphology of the polymer porous membrane prepared above with a scanning electron microscope, the obtained result...

Embodiment 3

[0079] The polymerization monomer is o-carboxyphenylacetic acid, the porogen is a mixture of anisole and dimethyl silicone oil, the crosslinking agent is glycerol, and the replacement solvent is toluene.

[0080] Preparation process of polymer porous membrane:

[0081] Add o-carboxyphenylacetic acid, anisole, simethicone and glycerol with a molar ratio of 10:1:21:1 into a container and mix evenly, put it into a reaction container and seal it, and polymerize at 90°C for 15 hours After the reaction is completed, the membrane is soaked in toluene, and soluble substances such as porogens are removed by ultrasonic waves, and a polymer porous membrane with a three-dimensional double continuous through-pore structure can be obtained.

[0082] Observing the microscopic morphology of the polymer porous membrane prepared above with a scanning electron microscope, the obtained results are as follows: image 3 As shown, it can be seen from the SEM photo that the material has a three-dime...

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Abstract

The invention provides a hydrophobic polymer porous membrane and a preparation method specific to the current situation of lack of a hydrophobic polymer membrane suitable for a membrane emulsification technology. The preparation method is characterized in that the polymer porous membrane with certain mechanical strength, different pore diameters and a bicontinuous structure is obtained by using a hydrophobic monomer comprising a frequently-used monomer as a reaction monomer and a polyfunctional group reactant as a catalyst through a reaction-induced phase separation method, wherein the frequently-used monomer and the polyfunctional group reactant are both suitable for stepwise polymerization and free radical polymerization. The hydrophobic polymer porous membrane is narrow in pore diameter distribution, and the size of the pore diameter of the membrane can be adjusted at random in the range of 1-60 micrometers. The membrane is applied to membrane emulsification for preparing W / O, W / O / W system emulsion, and the obtained emulsion is good in uniformity. Compared with a hydrophobic modified SPG membrane, the hydrophobic polymer porous membrane has the advantages that the stability is obviously improved under an alkaline using condition.

Description

technical field [0001] The invention relates to a polymer porous membrane, a preparation method and its application. The membrane has a three-dimensional double continuous through-hole structure, and various products can be obtained through processing, which can be applied to different fields, especially in membrane emulsification technology. application. Background technique [0002] As a new type of emulsion preparation technology, membrane emulsification can prepare various types of monodisperse emulsions with uniform particle size. Membrane emulsification technology has the advantages of low energy consumption, mild conditions, and uniform particle size of the prepared microspheres. It has broad application prospects in the cosmetics industry, the preparation of drug carriers in the food industry, and the preparation of separation media. The basic principle of membrane emulsification technology is: the dispersed phase grows up in the membrane pores, and at this time, it...

Claims

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Application Information

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IPC IPC(8): C08G59/50C08G59/20C08G59/32C08G63/127C08G8/20C08F212/08C08F212/36C08J9/26B01F3/08
Inventor 马光辉张荣月米亚策周炜清苏志国
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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