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Polymer capable of composing whole reused double water phase system

A polymer, phase-forming technology, applied in the polymer field

Inactive Publication Date: 2008-08-06
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Taking a broad view of the above-mentioned prior art, the biggest defect of its existence is that it only solves the recovery problem of a phase-forming polymer in a two-phase system.

Method used

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  • Polymer capable of composing whole reused double water phase system
  • Polymer capable of composing whole reused double water phase system
  • Polymer capable of composing whole reused double water phase system

Examples

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preparation example Construction

[0019] The preparation of the compound shown in formula V is based on methacryloyl chloride as a raw material, and the compound shown in formula VII is condensed with acryloyl chloride and formula VII using the prior art to obtain it (removing a part of HCl), and its synthetic route is as follows:

[0020]

[0021] In addition, the compounds represented by formula II, formula III, formula IV, formula VI and formula VII are all commercially available.

[0022] The method for preparing a pair of phase-forming polymers that can constitute a fully reusable two-phase aqueous system according to the present invention, its main steps are as follows:

[0023] ■Using benzene, anhydrous ether, tetrahydrofuran or ethanol as a solvent and azobisisobutyronitrile (AIBN) as an initiator, the molar ratio of the compound shown in formula I, the compound shown in formula II and the compound shown in formula III is 196 : 8: 1 into the solvent, in the presence of an inert gas, polymerize at 50...

Embodiment 1

[0028] Photosensitive Copolymer P NNC preparation:

[0029] Add 22.632g (0.2mol) isopropylacrylamide, 0.912g (0.0082mol) vinylpyrrolidone, 0.724g (0.001mol) sodium copper chlorophyllin in a stoppered Erlenmeyer flask, fully dissolve under stirring with 150ml benzene, 1.0 %molAIBN is used as an initiator, and nitrogen gas is filled for 10 to 15 minutes to fully remove oxygen. A stopper was used to seal the mouth of the Erlenmeyer flask, and the reaction was carried out on a water-bath shaker at 70° C. at 250 rpm for 24 hours. After the reaction was completed, the product was precipitated with n-hexane, and the precipitate was dried to constant weight to obtain the final product with a viscosity-average molecular weight of 7.1×10 3 . Because the sodium copper chlorophyllin monomer can absorb visible light, the maximum absorption wavelength of the polymer is determined to be 406nm.

Embodiment 2

[0031] pH sensitive copolymer P ADB preparation:

[0032]Add 33.33ml (0.42mol) acrylic acid, 26.67ml (0.15mol) 2-methylaminoethyl methacrylate, 3.33ml (0.021mol) tert-butyl methacrylate in a stoppered Erlenmeyer flask, the pH value in 200ml is 7.03 Fully dissolved in deionized water, 1.3% ammonium persulfate and sodium bisulfite (APS-NaHSO 3 ) composed of a composite redox system as an initiator, nitrogen and deoxygenation for 10 to 15 minutes. The reaction vessel was sealed, and the reaction was carried out at 55° C. and shaken in a water bath at 250 rpm for 24 hours. After the reaction was completed, the product was precipitated with petroleum ether, and the precipitate was dried to constant weight to obtain the final product. Determine its isoelectric point PI = 4.1. The polymer has a maximum UV absorption at 210 nm.

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Abstract

The invention relates to a forming phase polymer which can form total-recovery two-aqueous phase system, wherein one forming phase polymer is prepared by irregular copolymerization of the compounds represented as formulas I, II, III, while the viscosity-average molecular weight of the copolymer is 103-105, and another forming phase polymer is prepared by irregular copolymerization of the compounds represented as formulas IV, VI, the while the viscosity-average molecular weight of the copolymer is 104-106.

Description

technical field [0001] The present invention relates to a polymer that can be used in a two-water phase system, in particular, a pair of phase-forming polymers that can form a fully recycled two-water phase system. Background technique [0002] The two aqueous phase system refers to two immiscible aqueous phase systems formed by dissolving polymers or polymers and inorganic salts in water at an appropriate concentration. The two-phase aqueous system has the advantages of low interfacial tension, mild separation process, low equipment investment and low energy consumption, and has a bright application prospect in separation engineering (especially biological separation). [0003] In order to further reduce the separation cost and better protect the environment, the preparation of recyclable phase-forming polymers has become a research hotspot. [0004] Patrickios et al. used methacrylic acid, methyl methacrylate, 2-(dimethylamino)ethyl methacrylate and phenylethyl methacryla...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/12C08L33/26C08L33/04
Inventor 曹学君王伟宁标
Owner EAST CHINA UNIV OF SCI & TECH
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