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Polydopamine methacrylamide sulphobetaine and preparation method and application thereof

A technology of polydopamine methacrylamide sulfobeet and dopamine methacrylamide, which is applied in the field of material science and can solve the problems of low surface modification efficiency, harsh conditions, and complicated methods

Inactive Publication Date: 2017-11-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are usually two ways to modify the surface by using polymer materials: 1) grafting existing polymers on the surface (Grafting-to), 2) growing polymer chains on the surface (Grafting-from ); the former method is simple, but the surface modification efficiency is low and unstable; the latter modification effect is good, but the method is complicated and the conditions are harsh
[0004] The properties of substrates in different application fields are quite different, such as metal materials for ocean ships, ceramic materials for organ transplantation, organic materials for water treatment, etc. Substrate or use environment

Method used

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  • Polydopamine methacrylamide sulphobetaine and preparation method and application thereof
  • Polydopamine methacrylamide sulphobetaine and preparation method and application thereof
  • Polydopamine methacrylamide sulphobetaine and preparation method and application thereof

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Embodiment 1

[0036] The preparation of embodiment 1, DMA

[0037] Add 10g of sodium tetraborate and 4g of sodium bicarbonate (used to protect the o-diphenol group) into 100mL of ultrapure water, and after passing through argon for 30 minutes, add 5g of dopamine hydrochloride, and then add 4.7mL of methacrylic anhydride, wherein First mix 4.7mL of methacrylic anhydride into 25mL of tetrahydrofuran, and then add it dropwise with a separatory funnel. In order to control the pH to be greater than 8, add 1mol / L sodium hydroxide solution dropwise, and constantly use pH test paper to detect the reaction. The reaction was carried out for 14 hours under an argon gas atmosphere. After the above reaction was carried out for 16 hours, the resulting suspension was washed twice with 50 mL of ethyl acetate, and the resulting aqueous solution was adjusted to a pH of about 2 with 6 mol / L, then extracted three times with 50 mL of ethyl acetate, and the organic phase was washed with anhydrous MgSO 4 After ...

Embodiment 2

[0038] The preparation of embodiment 2, PDMASB6.4

[0039] 50mL of ultrapure water and methanol with a volume ratio of 4:1 is used as a solvent, firstly add 0.5g of sodium tetraborate and 0.1g of sodium bicarbonate, and after passing argon for half an hour, add monomer SB and DMA, wherein SBMA and DMA The molar ratio was 6.4:1, and nitrogen gas was introduced for 15 minutes. After fully stirring, it was transferred to an oil bath at 60°C for reaction, and the reaction was stopped after 20 hours. After cooling, it was settled twice with 250 mL of ethanol, and the product was obtained after freeze-drying.

Embodiment 3

[0040] The preparation of embodiment 3, PDMASB1.6

[0041] 50mL of ultrapure water and methanol with a volume ratio of 1:1 is used as a solvent, firstly add 0.5g sodium tetraborate and 0.15g sodium bicarbonate, and after passing nitrogen for half an hour, add monomer SB and DMA, wherein SBMA and DMA mole The ratio is 1.6:1, and then nitrogen gas is introduced for 15 minutes. After fully stirring, it was transferred to an oil bath at 80°C for reaction, and the reaction was stopped after 12 hours. After cooling, it was settled twice with 250 mL of ethanol, and the product was obtained after freeze-drying.

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Abstract

The invention relates to polydopamine methacrylamide sulphobetaine (PDMASB) which is obtained by random copolymerization of dopamine methacrylamide monomer (DMA) and methacrylamide ethyl sulphobetaine monomer (SB). Surface modification of different base materials is realized by adhesive power of o-diphenol of dopamine and hydrophilic stain resistance of sulphobetaine through a polymer aqueous solution dip coating mode, the biological pollution resistance of the surface of the material can be improved to different extents,, the method is gentle and feasible, surface modification can be realized under the condition that the production process of raw materials is not changed, and industrialized is facilitated.

Description

technical field [0001] This invention is in the field of materials science, in particular surface-modified polymers. Background technique [0002] In modern material science, surface coating and surface modification can protect the material itself from the erosion of the external environment, and can change the physical and chemical properties of the material surface without changing the properties of the base material, endowing the base material with new properties. Features. [0003] Polymer materials have a wide range of raw materials, and the molecular structure of materials can be changed through molecular design. They have the advantages of diverse properties, high biological activity, and easy processing. They are one of the most widely used materials in surface modification. There are usually two ways to modify the surface by using polymer materials: 1) grafting existing polymers on the surface (Grafting-to), 2) growing polymer chains on the surface (Grafting-from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/60C08F220/38C09D133/24C09D133/14
CPCC08F220/38C08F220/387C08F220/60C09D133/14C09D133/24
Inventor 韩霞刘洪来马国栋牛亚鹏
Owner EAST CHINA UNIV OF SCI & TECH
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