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A kind of cuo@pnipam temperature-sensitive composite material and its preparation method

A composite material and temperature-sensitive technology, which is applied in the field of CuO@PNIPAm temperature-sensitive composite materials and preparation, can solve the problems of low synthesis steps and limited yield

Inactive Publication Date: 2020-05-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the controllable preparation method of such particles is mainly based on the surface grafting method. Although this method has a high degree of controllability, relatively many synthesis steps and low yield still limit its application.

Method used

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  • A kind of cuo@pnipam temperature-sensitive composite material and its preparation method
  • A kind of cuo@pnipam temperature-sensitive composite material and its preparation method
  • A kind of cuo@pnipam temperature-sensitive composite material and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0024] a) CuO-MPS: 0.05g CuO was mixed with 70% concentrated sulfuric acid and 30% H 2 o 2 The solution (volume fraction) was treated at 50°C for 3 hours, and the excess acid was washed away with ethanol; 0.05g CuO was dispersed in 50ml ethanol solution, and 0.5ml silane coupling agent methacryloxypropyltrimethoxysilane MPS was added, Stir at 40°C for 24h with a magnetic stirrer, wash off excess MPS with ethanol, and dry in a vacuum oven set at 40°C.

[0025] b) Three vacuum cycles: Dissolve 0.05g CuO-MPS and 0.05g NIPAm monomer in 25ml deionized water, then add them to a three-necked flask and vacuum three times;

[0026] c) Selection of reaction conditions: Nitrogen gas is introduced through a titanium alloy aeration stone; ultrasonic power is selected to be 750W, and ultrasonic (10min)-intermittent (5min, N) is used at 25°C 2 Gas) circulation mode for polymerization reaction, the cumulative time of ultrasonic is 1.5h;

[0027] d) Post-treatment: the product is separated,...

Embodiment 2

[0029] a) CuO-PDA: Put 1 mmol of porous CuO and 0.05 mmol of dopamine hydrochloride DA into 50 mL of ultrapure water; then add 0.8 mmol of hexamethylenetetramine into the aqueous solution, and react the reaction solution at 80°C for 3 hours ; Rinse the product with deionized water to remove excess dopamine hydrochloride, and obtain modified CuO-PDA after centrifugal drying.

[0030] b) Three vacuum cycles: Dissolve 0.05g CuO-PDA and 0.05g NIPAm monomer in 25ml deionized water, then add them to a three-necked flask and vacuum three times;

[0031] c) Selection of reaction conditions: Nitrogen gas is introduced through a titanium alloy aeration stone; ultrasonic power is selected to be 750W, and ultrasonic (10min)-intermittent (5min, N) is used at 25°C 2 Gas) circulation mode for polymerization reaction, the cumulative time of ultrasonic is 1.5h;

[0032] d) Post-treatment: the product is separated, and separated by centrifugation and changing the liquid three times with ultrap...

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Abstract

The invention relates to a CuO-coated PNIPAm temperature-sensing composite material and a preparation method thereof. The method has two effective modification modes for porous CuO, which comprises the following steps: 1) through acidifying and silane coupling modification, organic modified CuO-MPS is obtained; 2) by controlling polymerization of polydopamine on the surface of CuO, CuO-PDA is obtained; and 3) preparing an aqueous solution by CuO-MPS(CuO-PDA) and a NIPAm monomer, selecting an ultrasonic amplitude transformer with ultrasonic frequency being 20 kHz for a plug-in type reaction, and performing polymerization with the ultrasonic power being 750 W and a ultrasonic-intermittent circulating mode (by introducing N2 gas), and performing ultrasonic irradiation for 1.5 h to prepare theCuO-coated PNIPAm temperature-sensing composite material. The modified CuO obtained by the above modification method has good grafting performance, the porous CuO-coated PNIPAm temperature-sensing composite material with an adjustable shell-layer structure is obtained through an ultrasonic chemical one step method. The porous CuO-coated PNIPAm temperature-sensing composite material is prepared bythe ultrasonic chemical method, and the preparation method has the obvious characteristics of easy composition, high degree, mild performance, and low energy consumption.

Description

technical field [0001] The invention belongs to the field of ultrasonic synthesis, and relates to a CuO@PNIPAm temperature-sensitive composite material and a preparation method. Background technique [0002] CuO is an important class of p-type semiconductor materials, which have been widely used in various fields in the field of functional materials, such as lithium-ion battery electrodes, solar cells, supercapacitors, sensors, etc. Among them, CuO with different morphology and electrode structure is used as an electrochemical glucose sensing material. Due to its low cost, high stability, and non-toxicity, it has become an important class of enzyme-free glucose sensing materials. When used as a biosensor implanted in the body, the detection process often requires automatic response to certain physical, chemical, and environmental signal stimulation conditions. Therefore, how to construct a stimuli-responsive electrochemical biosensor is the key to realize the intelligentiza...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/54
CPCC08F292/00C08F220/54
Inventor 翟薇曹琦陈芳马晓燕魏炳波
Owner NORTHWESTERN POLYTECHNICAL UNIV