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A hybridized amphion membrane containing different acid groups and method for preparing same

A technology of acidic groups and zwitterions, which is applied in the field of hybrid zwitterionic membranes containing different acidic groups and its preparation, can solve the problem of difficult separation of various ions and zwitterionic substances, difficult selective separation of various ions, and application The problem of limited value and other problems, to achieve the effect of short reaction time, simple operation, and few reaction steps

Inactive Publication Date: 2006-11-22
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because it is an organic membrane, its temperature resistance is poor, its application value is limited, and it is difficult to separate various ions and zwitterions
[0004] Chinese patent application number 03131571.2 proposes a method for preparing a negatively charged organic-inorganic hybrid membrane, which uses an alkoxysilane or halosilane containing a mercapto group in the molecular chain as a raw material to prepare a negatively charged sol-gel reaction precursor; Negatively charged organic-inorganic hybrid membrane is obtained by oxidation after membrane formation; however, the membrane only contains one kind of sulfonic acid group, so it is also a charged hybrid membrane containing the same acidic group, and it is difficult to separate various ions and zwitterions substance
[0005] Chinese Patent Application No. 200410065363.X proposes a method for preparing an inorganic-organic hybrid charged mosaic film, which is a polymer amine produced by the reaction of a silane coupling agent or a silane coupling agent with an organic amine or / and diol Derivatives are used as raw materials, and ionization reactions are used to prepare inorganic-organic hybrid charged mosaic membranes; however, the membrane only contains one carboxyl group, so it is also a charged hybrid membrane containing the same acidic group, and it is difficult for a variety of selective separation of ions
[0006] So far, there have been no reports on hybrid zwitterionic membranes containing different acidic groups

Method used

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  • A hybridized amphion membrane containing different acid groups and method for preparing same
  • A hybridized amphion membrane containing different acid groups and method for preparing same
  • A hybridized amphion membrane containing different acid groups and method for preparing same

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1. prepares different acidic groups with reactant ratio mercaptopropyltrimethoxysilane: N-β-aminoethyl-γ-aminopropyltrimethoxysilane: butyrolactone=1:1:4 hybrid zwitterionic membrane

[0039] Measure N-β-aminoethyl-γ-aminopropyltrimethoxysilane and mercaptopropyltrimethoxysilane, respectively dissolve in n-butanol, add butyrolactone for ionization reaction, adjust N-β- The molar ratio of aminoethyl-γ-aminopropyltrimethoxysilane to mercaptopropyltrimethoxysilane and butyrolactone is 1:1:4, and stirring is continued for 4 hours at 30°C until a sol-gel solution is obtained. glue, and the product was dried at 70°C to obtain a charged zwitterionic hybrid material containing an acidic group. Using this hybrid material as a precursor, it was dissolved in n-butanol to make a coating solution, and dip-coated to form an inorganic-organic hybrid charged film, which was then oxidized in hydrogen peroxide (30%) to form another Acidic groups, then carry out infrared spec...

Embodiment 2

[0043] Embodiment 2. prepare with reactant ratio N-beta-aminoethyl-gamma-aminopropyltrimethoxysilane: mercaptopropyltrimethoxysilane: butyrolactone=1:2:4 to prepare different acidic groups hybrid zwitterionic membrane

[0044] Measure N-β-aminoethyl-γ-aminopropyltrimethoxysilane, dissolve it in n-butanol, add mercaptopropyltrimethoxysilane under stirring for cross-linking reaction, add butyrolactone for ionization reaction. Stirring was continued for 6 hours at 25°C, and the obtained sol was allowed to stand for 24 hours. An aluminum oxide plate with a diameter of 5 cm and an average surface pore size of 0.2-1 μ was immersed in the sol for 15 minutes. Place it at 100°C for 30 minutes, then put it into an oven, heat it up to 70°C at a rate of 10°C / h under normal pressure, keep it warm for 1 hour, then raise the temperature to 100°C and keep it warm for 1 hour, and cool to room temperature to obtain a pale yellow surface layer. Diaphragm. The membrane is immersed in butyrolac...

Embodiment 3

[0052] Embodiment 3. prepare the compound that contains different acid groups with reactant ratio mercaptopropyl trimethoxysilane: γ-aminopropyl trimethoxysilane: n-butyl titanate: butyrolactone=1:1:1:6 hybrid zwitterionic membrane

[0053] Measure γ-aminopropyltrimethoxysilane and mercaptopropyltrimethoxysilane, respectively dissolve in N,N-dimethylformamide (DMF), add n-butyl titanate and stir evenly, then add The ester was ionized, and the molar ratio of γ-aminopropyltrimethoxysilane and mercaptopropyltrimethoxysilane, n-butyl titanate and butyrolactone was adjusted to be 1:1:1:6 at 25°C Stirring was continued for 4 hours until a sol was obtained, and the product was dried at 120° C. to obtain a charged zwitterionic hybrid material containing an acidic group. The hybrid material is used as a precursor, dissolved in DMF to make a coating solution, dip-coated to form a hybrid film, and the film is oxidized in hydrogen peroxide to generate another acidic group, and then analy...

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Abstract

The invention discloses a hybridized amphoteric ion membrane containing different acid gene and the method for preparing the same. The method comprises oxiding or sulfonating hybridized membrane to make membrane contain one acid gene, then ionizing said membrane to make it contain another different acid gene and amphiprotic ion pair, finally getting said product. The different acid genes in membrane are arranged on two sides of molecular chain, anion communication gene is connected to molecular main chain to form asymmetric molecular structure. The exchange capacity of zwitterions is reduced with increasement of heat treatment temperture and membrane coating number; the heat-resistance of membrane is good. The product can be used for separation, grading and compression of biological macromolecular, separation of electrolyte and non-electrolyte, and selective separation of a plurality of ions. The invention employs nontoxic inner ester as ionization agent, and oxidation and sulfonation to converse acid gene. The process is safe and clean.

Description

Technical field: [0001] The invention belongs to the field of membrane technology, in particular to a hybrid zwitterionic membrane containing different acidic groups prepared by sol-gel reaction, ionization reaction and oxidation or sulfonation process and a preparation method thereof. Background technique: [0002] The United States "Journal of Polymer Science" (J.Polymer Science: Part B: Polymer Physics, 1986, 24, 2681-2702) and "Journal of Nanjing University" (1991, 27 (1), 85-92) have reported on inorganic -Research on organic hybrid polyurethane block copolymer and double ionization. The method uses polysiloxane as a raw material and propane sultone as an ionizing agent. Because the preparation process is complicated, the copolymer has a macroscopic phase separation phenomenon, and the film-forming performance is poor, so the ionized membrane cannot be prepared. [0003] Holland "Journal of Membrane Science" (J.Membrane Science, 2002, 207, 157-170) reported that polyvi...

Claims

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Application Information

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IPC IPC(8): B01D71/70
Inventor 徐铜文刘俊生傅延勋杨伟华
Owner UNIV OF SCI & TECH OF CHINA
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