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A kind of zwitterionic copolymer, preparation method and method for using it to construct coating

A technology of amphoteric ions and copolymers, which is applied in coatings, biocide-containing paints, antifouling/underwater coatings, etc., can solve problems such as difficult quantification, poor coating stability, and complicated purification steps of copolymers, and achieve structural Clear, good stability, good anti-biological contamination performance

Active Publication Date: 2021-06-04
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A kind of zwitterionic copolymer, preparation method and method for using it to construct coating
  • A kind of zwitterionic copolymer, preparation method and method for using it to construct coating
  • A kind of zwitterionic copolymer, preparation method and method for using it to construct coating

Examples

Experimental program
Comparison scheme
Effect test

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 present invention provides a zwitterionic copolymer, as shown in formula (I), the copolymer is prepared by free radical polymerization; the method for constructing a coating by using the zwitterionic copolymer comprises the following steps: preparing a pH of 6-6 The dopamine hydrochloride solution of Copolymer solution, spraying or dipping the activated copolymer solution on the surface of the base material containing the polydopamine mediating layer to construct a zwitterionic copolymer coating. The method for constructing the coating has the advantages of mild conditions, no metal catalyst, etc. The constructed coating has good stability, strong hydrophilicity and anti-pollution ability, long service life, and has good resistance to biological pollution such as bacteria and proteins. Biofouling performance.

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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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/056C09D133/14C09D5/16C08L79/04C08G73/06
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