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Method for modifying surface of precious metal by using stimuli-responsive polyether amine brush

A stimuli-responsive, polyetheramine technology, applied in the polymer field, can solve the problems of difficult to obtain functional polymer brushes, high requirements for experimental conditions, difficult to apply on a large scale, etc. Promising, easy-to-use effects

Inactive Publication Date: 2012-01-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surface grafting (Graft to) and surface initiated polymerization (Graft from) require high experimental conditions, time-consuming and labor-intensive, and difficult to apply on a large scale in actual production
Many studies have shown that the method of polymer complexation grafting to the metal surface through the sulfhydryl group in the polymer chain is a very common "grafting to the surface method" in the preparation of polymer brushes, but it is difficult to obtain functional polymer brushes.

Method used

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  • Method for modifying surface of precious metal by using stimuli-responsive polyether amine brush
  • Method for modifying surface of precious metal by using stimuli-responsive polyether amine brush
  • Method for modifying surface of precious metal by using stimuli-responsive polyether amine brush

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Synthesis of gPEA-SH

[0019] 1.28g (2mmol) PPO, 1.0g (1mmol) Jeffamine L100 and 0.077g (1mmol) mercaptoethylamine were added to 10mL of absolute ethanol, and the solution was reacted at 80°C for 24h under the protection of nitrogen. After cooling to room temperature, the solution was Pour into 10 times the volume of anhydrous ether, filter, and vacuum dry to obtain 2.2 g (93%) of gPEA-SH.

[0020] 2. Gold surface preparation

[0021] Silicon wafers were boiled in a mixed solution of concentrated sulfuric acid and hydrogen peroxide for 1 hour to obtain a clean surface. Spray gold on the surface of a clean silicon wafer to obtain a gold surface for experiments.

[0022] 3. Preparation of stimuli-responsive polyetheramine polymer brushes

[0023] Immerse the gold surface in a chloroform solution of gPEA-SH with a concentration of 100 mg / mL for 5 min. Take it out, sonicate in chloroform or ethanol for 1 min, wash the gPEA-SH adhered between the surfaces, and obtain ...

Embodiment 2

[0031] 1. Synthesis of gPEA-SH

[0032] Add 1.28g (2mmol) of PPO, 1.0g (1mmol) of Jeffamine L100 and 0.077g (1mmol) of mercaptoethylamine into 10mL of absolute ethanol, and react the solution at 80°C for 24h under the protection of nitrogen. After cooling to room temperature, the solution Pour into 10 times the volume of anhydrous ether, filter, and vacuum dry to obtain 2.2 g (93%) of gPEA-SH.

[0033] 2. Silver surface preparation

[0034] Silicon wafers were boiled in a mixed solution of concentrated sulfuric acid and hydrogen peroxide for 1 hour to obtain a clean surface. Spray silver on the surface of a clean silicon wafer to obtain a silver surface for experiments.

[0035] 3. Preparation of stimuli-responsive polyetheramine polymer brushes

[0036] Immerse the copper sheet in the chloroform solution of gPEA-SH with a concentration of 100mg / mL for 5h. Take it out, and sonicate in chloroform or ethanol for 1 min to clean the gPEA-SH adhered between the surfaces, and ob...

Embodiment 3

[0038] 1. Synthesis of gPEA-SH

[0039]1.28g (2mmol) PPO, 1.0g (1mmol) Jeffamine L100 and 0.077g (1mmol) mercaptoethylamine were added to 10mL of absolute ethanol, and the solution was reacted at 80°C for 24h under the protection of nitrogen. After cooling to room temperature, the solution was Pour into 10 times the volume of anhydrous ether, filter, and vacuum dry to obtain 2.2 g (93%) of gPEA-SH.

[0040] 2. Copper sheet surface treatment

[0041] The copper sheet was washed with dilute acid to remove the oxidizing agent, then washed with deionized water and dried.

[0042] 3. Preparation of stimuli-responsive polyetheramine polymer brushes

[0043] Immerse the copper sheet in the chloroform solution of gPEA-SH with a concentration of 100mg / mL for 5h. Take it out, and sonicate in chloroform or ethanol for 1 min to clean the gPEA-SH adhered between the surfaces, and obtain a copper surface modified with a stimuli-responsive polyetheramine gPEA-SH polymer brush.

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Abstract

The invention discloses a method for modifying the surface of a precious metal by using a stimuli-responsive polyether amine brush in the technical field of polymers. The method comprises the following steps of: reacting Jeff amine L100 at an amino group sealed end, polyurethane propylene and mercaptoethylamine to obtain sulfydryl-containing stimuli-responsive graft poly(ether) amine (gPEA-SH) polymer solution; and immersing a metal sheet into the gPEA-SH polymer solution, then washing ultrasonically, and drying. By the method, gPEA polymers can be firmly fixed on the surface of the metal through a complexing effect and are tightly arranged, so that the surface of the precious metal which has pH and temperature double response performance of a PEA polymer brush is obtained; therefore, the surface of the precious metal has the pH and temperature double response performance, so that the development of functionalized precious metal is promoted, and the potential application range of the stimuli-responsive polymer brush is expanded.

Description

technical field [0001] The invention relates to a method in the technical field of macromolecules, in particular to a method for modifying the surface of a precious metal with a stimuli-responsive polyetheramine brush. Background technique [0002] Stimuli-responsive polymers are a class of polymers that can respond to subtle changes (stimuli) in the external environment, resulting in corresponding changes in physical structure and chemical properties or even mutations. External stimuli can be temperature, pH, ionic strength ( Electrolyte), electric field, light, etc. Environmentally responsive polymers have a wide range of applications, such as sensors, actuators, smart switches, drivers, displays, optical communications, drug carriers, biocatalysis and other fields. Polyetheramines are a very important class of stimuli-responsive polymers. From a structural point of view, its main chain contains a large number of PPO chain segments, and the side chain contains a large nu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/14B05D3/00C08G65/00
Inventor 贾新雁姜学松刘睿
Owner SHANGHAI JIAO TONG UNIV
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