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Responsiveness-based copolymer modified polypropylene (PP) micro-filtration membrane

A polypropylene microfiltration membrane and copolymer modification technology, applied in the field of functional polymer materials, can solve the problems of complex operation steps and processes, less intelligent modification of PP microfiltration membrane, etc., and achieve simplicity, convenience and repeatability strong effect

Inactive Publication Date: 2016-03-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because PP microfiltration membranes are non-polar, there are still relatively few studies on the intelligent modification of PP microfiltration membranes.
At present, the research on the intelligent modification of PP microfiltration membranes is mainly focused on temperature-responsive modification, and there are relatively few studies on the pH-responsive modification of PP microfiltration membranes. In addition, commonly used modification methods Most of them require complex operation steps and processes, and most of them focus on the use of chemical modification and other aspects

Method used

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  • Responsiveness-based copolymer modified polypropylene (PP) micro-filtration membrane
  • Responsiveness-based copolymer modified polypropylene (PP) micro-filtration membrane
  • Responsiveness-based copolymer modified polypropylene (PP) micro-filtration membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1, the synthesis of responsive ternary random copolymer PEDM

[0014] Add quantitative DEAEMA, MMA and calculated amount of PEGMA to a 50 mL round bottom flask, add 25 mL of 1,4-Dioxane and 1.5% of the total amount of monomer AIBN, pass N 2 After 30 minutes, it was sealed and reacted with stirring at 65°C for 12 hours to obtain the terpolymer P(PEGMA-co-DEAEMA-co-MMA). Using anhydrous ether as a precipitating agent, after three times of dissolution and precipitation, the unreacted monomers were removed, and then vacuum-dried to constant weight.

[0015] The resulting copolymer is:

[0016]

[0017] n=5-6, x=6-15; y=9-30; z=40-70, expressed as PEDM.

Embodiment 2

[0018] Embodiment 2, preparation of responsive polypropylene microfiltration membrane

[0019] Dissolve the responsive copolymer in a solvent and prepare a surface modifier solution with a certain concentration. Soak the PP microfiltration membrane in the solution containing the surface modifier at room temperature for 20 hours, then take it out, and rinse the soaked sample with distilled water for 2 hours , and then soak the sample in water at 20°C for 20min, and finally dry it in vacuum. Change the specific process conditions, such as the concentration of the modifier, the treatment temperature, etc., and use the same method to modify the polypropylene microfiltration membrane.

Embodiment 3

[0020] Embodiment 3, the preparation of responsive polypropylene microfiltration membrane

[0021] Dissolve the responsive copolymer in different solvents, prepare a surface modifier solution with a certain concentration, soak the PP microfiltration membrane in the solution containing the surface modifier for 20 hours, take it out, rinse the soaked sample with distilled water for 2 hours, and then Soak the sample in water at 20°C for 20 min, and finally dry it in vacuum. Change the specific process conditions, such as the concentration of the modifier, the treatment temperature, etc., and use the same method to modify the polypropylene microfiltration membrane.

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Abstract

The invention provides a responsiveness-based copolymer modified PP micro-filtration membrane, belonging to the field of functional polymer materials. According to the invention, polyethylene glycol methacrylate (PEGMA), diethylaminoethyl methacrylate (DEAEMA) and methyl methacrylate (MMA) are used as copolymerization monomers and undergo free radical polymerization to synthesize responsive three-component random copolymer P (PEGMA-co-DEAEMA-co-MMA); the responsiveness of the PP micro-filtration membrane is modified by using a surface entrapment method, and the wettability and surface morphology of the membrane can be regulated and controlled by changing the concentration and variety of a modification agent, treating temperature, etc.; and the amounts of water permeation of the PP micro-filtration membrane under different pH value conditions before and after modification. The responsive PP micro-filtration membrane with controllable surface morphology and performance obtained in the invention is expected to be used as an intelligent responsive material in the fields like tissue engineering and oil-water separation materials.

Description

technical field [0001] The invention discloses a polypropylene microfiltration membrane based on a responsive copolymer modification, which belongs to the field of functional polymer materials. Background technique [0002] Environmentally sensitive polymers refer to functional polymer materials that can respond to environmental changes. Among them, the pH value is one of the common stimulating factors for environment-sensitive polymers. Most of the pH-sensitive polymers contain ionizable groups. As the pH value of the environment changes, the degree of ionization of the groups changes, resulting in The conformation of the chain changes accordingly, so that the surface can be controlled. The tertiary amine structure in diethylaminoethyl methacrylate can be protonated (deprotonated) under certain conditions, so it has good pH sensitivity. In recent years, its potential applications in drug controlled release, chemical separation, and tissue engineering have attracted extens...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/34C08F220/28C08J5/18
Inventor 陈明清王月李小杰
Owner JIANGNAN UNIV
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