Preparation method of two-dimensional polymer core-shell structure nanowire network coating

A core-shell structure and nanowire technology, applied in the field of nanomaterials, can solve the problems of poor flexibility, poor solubility, unfavorable single-layer coating, etc., and achieve the effect of good application range and convenient preparation

Inactive Publication Date: 2018-10-09
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Inspired by the sticky protein structure in shells in nature, using the self-aggregation of dopamine molecules with similar structures, different surfaces can be soaked in dopamine solutions. Under alkaline conditions, different surfaces can be coated with a layer of polydopamine. The surface Can be: inert metals, oxides, polymers, semiconductor ceramics, etc. (Science, 2007, 318, 426-430), but this coating is a void-free polymer coating, and the...

Method used

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  • Preparation method of two-dimensional polymer core-shell structure nanowire network coating
  • Preparation method of two-dimensional polymer core-shell structure nanowire network coating
  • Preparation method of two-dimensional polymer core-shell structure nanowire network coating

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1, PEG 113 - b -P4VP 76 / lambdaDNA nanowires form a two-dimensional network coating on the surface of silicon wafers

[0027] Configure 2mL 2mg / mL PEG 113 - b -P4VP 76 Methanol solution, add 3mL saturated carbon dioxide water dropwise, then add dropwise 1mL 0.2mg / mL lambda DNA aqueous solution, stir well for 4h, then add 14mL carbon dioxide water. After stirring for 24 h, 1 μL of 1,4-dibromobutane was added to crosslink for 48 h. Centrifuge three times at 12000rpm and dissolve in methanol. Then dilute to a concentration of 0.2 mg / mL, 0.1 mg / mL and 0.05 mg / mL, and drop 2.5 microliters of methanol solution onto a 1 square centimeter silicon wafer, spin-coat at 400 rpm for 15 seconds, and 3000 rpm , spin coating for 45s. Electron microscope observation.

Embodiment 2

[0028] Example 2, PEG 113 - b -P4VP 76 / lambdaDNA nanowires form a two-dimensional network coating on the surface of a glass sheet

[0029] Configure 2mL 2mg / mL PEG 113 - b -P4VP 76 Methanol solution, add 3mL saturated carbon dioxide water dropwise, then add dropwise 1mL 0.2mg / mL lambda DNA aqueous solution, stir well for 4h, then add 14mL carbon dioxide water. After stirring for 24 h, 1 μL of 1,4-dibromobutane was added to crosslink for 48 h. Centrifuge three times at 12000rpm and dissolve in methanol. Then dilute to a concentration of 0.2mg / mL, take 2.5 microliters of methanol solution and drop it on a glass slide of 1 square centimeter, spin-coat at 400 rpm for 15 seconds, and spin-coat at 3000 rpm for 45 seconds. Electron microscope observation.

Embodiment 3

[0030] Example 3, PEG 113 - b -P4VP 76 / lambdaDNA nanowires form a two-dimensional network coating on the surface of mica sheet

[0031] Configure 2mL 2mg / mL PEG 113 - b -P4VP 76 Methanol solution, add 3mL saturated carbon dioxide water dropwise, then add dropwise 1mL 0.2mg / mL lambda DNA aqueous solution, stir well for 4h, then add 14mL carbon dioxide water. After stirring for 24 h, 1 μL of 1,4-dibromobutane was added to crosslink for 48 h. Centrifuge three times at 12000rpm and dissolve in methanol. Then dilute to a concentration of 0.05 mg / mL, take 2.5 microliters of methanol solution and drop it on 1 square centimeter of mica, spin-coat at 400 rpm for 15 seconds, and spin-coat at 3000 rpm for 45 seconds. Electron microscope observation.

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Abstract

The invention belongs to the technical field of nano-materials, and particularly relates to a preparation method of a two-dimensional polymer core-shell structure nanowire network coating. The preparation method includes the steps: firstly, forming nanowires in protonated water and good solvent solution by amphiphilic block polymer poly (ethylene glycol)-b-poly (4-vinylpyridine) (or hydrophobic amine polymer) and DNA (deoxyribonucleic acid), performing centrifugal purification and dissolving the nanowires in methanol solution; dropwise adding the nanowire methanol solution to the surface of asubstrate, rapidly spreading the methanol solution to cover the surface, spreading the nanowires in the methanol solution along with the solution and then spinning and volatilizing redundant solutionto form the uniform nanowire network coating. The preparation method of the polymer nanowire network coating is simple and efficient, coatings can be formed on different surfaces, and a new prospect is provided for modification of different surfaces and preparation of composite two-dimensional materials.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a nanowire network coating with a two-dimensional polymer core-shell structure. Background technique [0002] In nature, the surface of organisms is very important to their survival, for example: chameleons change color according to the environment to adapt to the environment to protect themselves; the epidermis of plants protects their internal tissue structures, etc. Similarly, the surface performance of artificially processed materials is also very important, which affects the appearance and use of materials. For example: spraying paint on the surface of furniture can not only maintain the appearance, but also protect the internal materials of the furniture; the stealth of fighter jets comes from its stealth paint. The coating can weaken the reflection of radar, etc. Therefore, it is very important to modify the surface of the ma...

Claims

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Application Information

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IPC IPC(8): C09D187/00C09D7/63B82Y40/00
CPCB82Y40/00C09D7/63C09D187/005C08K5/02
Inventor 陈道勇王伟冲李嫣然
Owner FUDAN UNIV
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