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Method for constructing polymer brush on surface of material

A technology of polymer brush and polydopamine, which is applied in the direction of coating, etc., can solve the problems of difficult modification of materials, complicated oxygen removal steps, not cost-effective, etc., and achieve the effect of overcoming toxicity problems and strong universality

Inactive Publication Date: 2018-09-14
NORTHWEST UNIV(CN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional ATRP surface modification method for polymerization has great limitations: (1) it requires a large amount of heavy metal copper salt as a catalyst, which is not cost-effective and has potential toxicity problems in biomedical applications; (2) ) ATRP polymerization conditions include complex oxygen removal steps in a sealed reactor under anaerobic conditions; (3) ATRP initiators need to be fixed on the surface of the modified material, and most materials have no chemically reactive groups on the surface
Therefore, the traditional ATRP method is difficult to modify materials, especially for larger samples.

Method used

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  • Method for constructing polymer brush on surface of material
  • Method for constructing polymer brush on surface of material
  • Method for constructing polymer brush on surface of material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 Shown, the method for constructing polymeric brush on material surface described in the present invention, comprises the following steps:

[0031] 1. Prepare a dopamine aqueous solution (pH 8.3) with a concentration of 2mg / mL, and distill 1.5×1.5cm 2 Immerse the glass sheet in the above solution for 12 hours, rinse and dry at room temperature to obtain a glass sheet containing a polydopamine mediation layer. The average static contact angle is 18.4±0.1°, which is significantly lower than the static contact angle of the blank glass sheet. Contact angle 42°;

[0032] 2. Soak the glass sheet obtained in step 1 in the PBS (pH8.5) of 2mg / mL ATRP initiator: ethanol=1:1 (V / V) mixed solution, dip-coat at room temperature for 12h, rinse with ethanol Dry to obtain the glass flake that contains initiator coating, record its static contact angle and be 81.6 ± 0.7 °, compared with the glass flake that contains polydopamine intermediary layer, there has been obviou...

Embodiment 2

[0035] 1. Prepare a dopamine aqueous solution (pH 8.3) with a concentration of 8 mg / mL, and place 1.5 × 1.5 cm 2 The glass sheet was soaked in the above solution for 3h, rinsed and dried at room temperature to obtain a glass sheet containing a polydopamine mediation layer;

[0036] 2. Soak the glass sheet obtained in step 1 in the PBS (pH8.5) of 4mg / mL ATRP initiator: ethanol=1:1 (V / V) mixed solution, dip-coat at room temperature for 12h, rinse with ethanol Dry to obtain the glass flake that contains initiator coating;

[0037] 3. soak the glass flake containing the initiator coating obtained in step 2 in a solution containing 40mg / mL MPC, 6mg / mL L-ascorbic acid, 0.006mg / mL CuBr 2 , 0.0152mg / mL Bpy in PBS (pH 7.4) solution, reacted at 60°C for 12h under airtight conditions, rinsed with water and dried to obtain a glass sheet containing polymer brush coating, the static contact angle was 0°, and Significantly lower compared to glass flakes containing initiator coatings.

Embodiment 3

[0039] 1. Prepare a dopamine aqueous solution (pH 8.3) with a concentration of 0.5mg / mL, and place 1.5×1.5cm 2 The glass flakes were dipped in the above solution for 24 hours, rinsed and dried at room temperature to obtain glass flakes containing a polydopamine mediation layer;

[0040] 2. Soak the glass sheet obtained in step 1 in PBS (pH7.4): ethanol = 1:1 (V / V) mixed solution containing 1 mg / mL dopamine, 2 mg / mL ATRP initiator, and dip-coat at room temperature for 12 hours , rinsed with ethanol and dried to obtain a glass sheet containing an initiator coating;

[0041] 3. soak the glass sheet containing the initiator coating obtained in step 2 in a solution containing 20mg / mL MPC, 6mg / mL L-ascorbic acid, 0.0036mg / mL CuBr 2 , 0.0152mg / mL Bpy in PBS (pH 7.4) solution, reacted at 30°C for 12h under open conditions, rinsed with water and dried to obtain a glass sheet containing polymer brush coating, and its static contact angle was 5.0±0.6° , which is significantly lower tha...

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Abstract

The invention provides a method for constructing a polymer brush on the surface of a material. The method comprises the following steps: modifying the surface of the material with a dopamine solutionto construct a polydopamine-mediated layer; forming an initiator coating on the material containing the polydopamine-mediated layer by using an atom transfer radical polymerization (ATRP) initiator solution by means of dip coating or spraying; dipping the material containing the initiator coating into a solution containing an ethylenic monomer, L-ascorbic acid, CuX2 and 2,2-bipyridyl, and carryingout a reaction for 10-24h at 30-70 DEG C so as to form a polymer brush coating on the surface of the material. The method for constructing the polymer brush on the surface of the material can be performed under the air condition, and omits the step of oxygen removal; the copper salt consumption of the method is very little and is only several parts per ten thousands of the traditional ATRP, so that the problem that the traditional ATRP product has potential toxicity can be solved; furthermore, the method can be used for forming the polymer brush on the surface of any material, and is simple,convenient and high in universality.

Description

technical field [0001] The invention belongs to the field of material surface modification, in particular to a method for constructing polymer brushes on the material surface. Background technique [0002] Biofouling on the surface of materials is almost the main problem faced in the application process of all biological materials and separation materials, and surface modification is one of the effective methods to improve the anti-pollution of the surface of materials. By introducing a halogen initiating group on the surface of the material, the ATRP polymerization of these molecules can be initiated on the surface of the material under the action of a catalyst. Compared with directly grafting polymer chains onto the material surface, surface-initiated graft polymerization greatly increases the density of anti-biofouling molecules on the material surface and the length of the chains, improving the anti-biofouling properties of the material surface. [0003] Introducing ant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/28C08F120/24C09D133/16
CPCC03C17/28C08F120/24C09D133/16
Inventor 宫永宽李楠张梦倩
Owner NORTHWEST UNIV(CN)
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