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Preparation method for temperature stimuli-responsive nanofiber membrane carrying with precious-metal nanorod

A stimuli-responsive nanofiber membrane technology, which is applied in the field of preparation of intelligent hybrid nanofiber membranes, can solve the problems of high surface energy, easy agglomeration, loss, etc., and achieve mild conditions, simple preparation process, and environmentally friendly process. Effect

Inactive Publication Date: 2015-09-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Like other nanoparticles, pure noble metal nanorods tend to agglomerate due to their high surface energy and lose their properties as a result

Method used

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  • Preparation method for temperature stimuli-responsive nanofiber membrane carrying with precious-metal nanorod
  • Preparation method for temperature stimuli-responsive nanofiber membrane carrying with precious-metal nanorod
  • Preparation method for temperature stimuli-responsive nanofiber membrane carrying with precious-metal nanorod

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Experimental program
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Effect test

Embodiment 1

[0038] A method for preparing a temperature-stimuli-responsive nanofiber membrane loaded with noble metal nanorods, specifically:

[0039] (1) Dissolve N-isopropylacrylamide main monomer and N-methylolacrylamide functional monomer in absolute ethanol at a molar ratio of 100:30, wherein the total weight of the monomer is The weight ratio of ethanol is 1:2.5. The temperature was raised to 60° C. under stirring, and nitrogen gas was introduced to remove oxygen for 30 minutes. Add 0.2% thermal initiator azobisisobutyronitrile based on the total weight of the monomers to obtain a uniform and transparent solution, continue to blow nitrogen for 30 minutes, and keep warm at 60° C. for 48 hours. After the reaction, the solution obtained by the reaction is purified by the method of precipitation-washing-redissolution. The purification step is: add n-hexane 7 times the volume of ethanol to the colorless transparent viscous solution obtained by the reaction, and the precipitated The pol...

Embodiment 2

[0047] A method for preparing a temperature-stimuli-responsive nanofiber membrane loaded with noble metal nanorods, specifically:

[0048] (1) N-isopropylacrylamide main monomer and N-methylolacrylamide functional monomer are dissolved in absolute ethanol in a molar ratio of 100:20, wherein the total weight of the monomers is equal to that of absolute ethanol The weight ratio is 1:2.5. The temperature was raised to 60° C. under stirring, and nitrogen gas was introduced to remove oxygen for 30 minutes. Add 0.15% thermal initiator azobisisobutyronitrile based on the total weight of the monomers to obtain a uniform and transparent solution, continue to blow nitrogen for 30 minutes, and keep the temperature at 60° C. for 48 hours to react. After the reaction is completed, the solution obtained by the reaction is purified by the method of precipitation-washing-redissolution. The purification step is: add n-hexane 5 times the volume of ethanol to the colorless transparent viscous s...

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Abstract

The invention provides a preparation method for a temperature stimuli-responsive nanofiber membrane carrying with a precious-metal nanorod. The preparation method is characterized in that the preparation method comprises the steps that temperature stimuli-responsive polymer of active groups in molecule side chain zone is prepared; the precious-metal nanorod is synthesized through a seed growing method; the temperature stimuli-responsive polymer is dissolved in distilled water and is mixed with aqueous dispersion liquid of the precious-metal nanorod, stirring is conducted to form spinning solution, electrostatic spinning is conducted on the spinning solution, and a hybrid nanofiber membrane carrying with the precious-metal nanorod is formed; heat treatment is conducted on the hybrid nanofiber membrane formed through electrostatic spinning, and the temperature stimuli-responsive nanofiber membrane carrying with the precious-metal nanorod is acquired. The prepared hybrid nanofiber membrane carrying with the precious-metal nanorod is swelled in aqueous medium, so that dissolution does not occur, the temperature stimuli responsiveness is possessed, and the temperature of volume phase transformation ranges from 40 DEG C to 43 DEG C. The hybrid nanofiber membrane possesses a potential application prospect in a surface-enhanced Raman spectroscopy detecting base, a drug control delivery carrier, a sensor and the like.

Description

technical field [0001] The invention relates to the field of preparation of intelligent hybrid nanofiber membranes, in particular to a preparation method of a temperature-stimuli-responsive hybrid nanofiber membrane loaded with precious metal nanorods. Background technique [0002] Noble metal nanorods are rod-shaped metal nanoparticles with a certain aspect ratio formed by one or two noble metals, and the common noble metals are gold and silver. Two noble metals can form bimetallic alloy nanorods, or bimetallic core-shell composite nanorods with core-shell structure, and these two kinds of bimetallic nanorods often combine the properties of two noble metal nanorods. Compared with common spherical noble metal nanoparticles, noble metal nanorods are characterized by anisotropy. For example, their localized surface plasmon resonance (LSPR) optical properties are anisotropic, and there are two absorption peaks on the ultraviolet-visible-near-infrared absorption spectrum curve:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4282C08F220/54C08F220/58C08F6/12
Inventor 査刘生陈思远董旭
Owner DONGHUA UNIV
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