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Zwitterionic copolymer, preparation method and method for forming coating by use of zwitterionic copolymer

A zwitterionic, copolymer technology, used in coatings, biocide-containing paints, antifouling/underwater coatings, etc., can solve the problems of quantitative difficulties, complex purification steps of copolymers, poor coating stability, etc. Clear, good anti-biofouling performance, good stability

Active Publication Date: 2018-11-16
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the above-mentioned methods for constructing coatings have disadvantages such as poor coating stability, difficult quantification, complicated purification steps of the used copolymers, etc.

Method used

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  • Zwitterionic copolymer, preparation method and method for forming coating by use of zwitterionic copolymer
  • Zwitterionic copolymer, preparation method and method for forming coating by use of zwitterionic copolymer
  • Zwitterionic copolymer, preparation method and method for forming coating by use of zwitterionic copolymer

Examples

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Embodiment 1

[0050] Preparation of zwitterionic copolymers:

[0051] (1) Add 11.22g of succinic anhydride to a 250mL round bottom flask filled with 120mL of dioxane, and after fully dissolving, add 12mL of pyridine, 11.99g of hydroxyethyl methacrylate and 1.08g of 2-dimethyl Aminopyridine was reacted in an oil bath at 40°C for 24 hours, the reaction bottle was taken out, the reaction solution was spin-dried with a rotary evaporator, and 40 mL of dichloromethane was added, washed with 1M glacial hydrochloric acid and distilled water until the solution was neutral, and obtained by liquid separation The organic phase was dried overnight with anhydrous sodium sulfate, filtered, and the solvent was drained with a rotary evaporator and an oil pump to obtain 17.15 g of light yellow viscous liquid carboxylated alkenyl monomer Carboxyl-HEMA. figure 1 for 1 HNMR spectrum, the attribution of each characteristic peak in the figure is as follows: 6.14 (-CH 2 =C(CH 3 )-); 5.61(-CH 2 =C(CH 3 )-); 4....

Embodiment 2

[0056] Preparation of zwitterionic copolymers:

[0057] Carboxyl-HEMA is prepared by the same method as step (1) in Example 1; zwitterionic polymer PCPC is prepared by the same method as step (2) in Example 1, except that the addition of Carboxyl-HEMA is 0.59g, and the obtained PCPC's 1 H NMR spectrum as image 3 As shown, it can be seen from the figure that the molar ratio of Carboxyl-HEMA and MPC copolymerization units in the zwitterionic polymer PCPC is 2:8.

Embodiment 3

[0059] Preparation of zwitterionic copolymers:

[0060] Carboxyl-HEMA is prepared by the same method as step (1) in Example 1; zwitterionic polymer is prepared by the same method as step (2) in Example 1, except that 2.85g MSB is used to replace 3.0g MPC, and the resulting zwitterion Polymer PCSB 1 H NMR spectrum as Figure 4 As shown, it can be seen from the figure that the molar ratio of Carboxyl-HEMA and MSB copolymerization units in the zwitterionic polymer PCSB is 1:9.

[0061]

[0062] In the above formula, m and n are respectively the number of repeating units of Carboxyl-HEMA and MSB copolymerization units in the zwitterionic polymer PCSB; c and I e respectively Figure 4 Integral area of ​​c peak and e peak.

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Abstract

The invention provides a zwitterionic copolymer shown in a formula (I). The copolymer is prepared through free radical polymerization. A method for forming a coating by use of the zwitterionic copolymer comprises steps as follows: a dopamine hydrochloride solution with the pH being 6-9 is prepared; a to-be-modified matrix material is soaked in the dopamine hydrochloride solution, and a polydopamine mediated layer is formed on the surface of the matrix material; the zwitterionic copolymer is activated, an activated zwitterionic copolymer solution is obtained, the activated copolymer solution issprayed or dip-coated on the surface of the matrix material containing the polydopamine mediated layer, and the zwitterionic copolymer coating is formed. The method for forming the coating has the advantages of mild conditions, no metal catalysts and the like, the formed coating has good stability, high hydrophilicity and anti-pollution capability, long service life and good biological pollutionresistance to biological pollution such as bacteria, protein and the like.

Description

technical field [0001] The invention relates to the technical field of polymer synthesis and base material surface modification, in particular to a zwitterionic copolymer, a preparation method and a method for constructing a coating using the same. Background technique [0002] In recent years, a series of problems such as inflammation, coagulation, and infection caused by biological contamination of proteins, cells, and bacteria in the clinical application of biomedical materials and devices have severely limited the clinical application of such materials and devices. Surface modification of existing biomedical materials, that is, realizing the anti-biological contamination of materials by controlling the interface, is a simple and feasible method to solve the problem of biological contamination on the surface of existing biological materials. [0003] Improving the biocompatibility of materials is generally by constructing hydrophilic polymers or hydrophilic groups on the ...

Claims

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Application Information

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IPC IPC(8): C08J7/04C09D133/14C09D5/16C08L79/04C08G73/06
CPCC09D133/14C09D143/02C08F220/28C08G73/0672C09D5/1668C08J2379/04C08J2433/14C08J2443/02C08J7/0427C08F220/283C08F220/387C08F230/02
Inventor 张世平卢倩李荣宫永宽
Owner NORTHWEST UNIV
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