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Dispersion method for surface non-covalent modification of nickel nanowire

A non-covalent modification, nickel nanowire technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of nickel nanowires prone to agglomeration or entanglement, and solve the problem of agglomeration. Or winding, broad application prospect, good effect

Inactive Publication Date: 2016-06-08
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to provide a dispersion method for non-covalent modification of the surface of nickel nanowires, thereby solving the problem that nickel nanowires are prone to agglomeration or entanglement in aqueous solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Configure surface treatment solution: 0.2mol / L sulfuric acid solution;

[0022] (2) Place the nickel nanowires in the surface treatment solution, and mechanically stir for 4 minutes at 50° C., with a stirring rate of 400 rpm;

[0023] (3) After repeatedly washing the nickel nanowires to neutrality, prepare an aqueous solution of nickel nanowires with a mass concentration of 0.05%;

[0024] (4) Add cetyltrimethylammonium bromide to the prepared nanowire aqueous solution to make the mass concentration 0.5%, and stir at 20°C for 10 min at a stirring rate of 400 rpm.

[0025] At room temperature, test the settling time and absorbance of 1h of the nickel nanowire suspension treated by dispersion, its value is 13min and 0.631 respectively, compared with the nickel nanowire suspension not treated by this dispersion method under the same conditions, its sedimentation The time is extended by 44.44%, and the absorbance is increased by 10.31%, that is to say, the dispersion e...

Embodiment 2

[0027] (1) Configure surface treatment solution: 0.25mol / L sulfuric acid solution;

[0028] (2) Place the nickel nanowires in the surface treatment solution, and mechanically stir for 5 minutes at 60° C., with a stirring rate of 500 rpm;

[0029] (3) After repeatedly washing the nickel nanowires to neutrality, prepare an aqueous solution of nickel nanowires with a mass concentration of 0.05%;

[0030] (4) Add cetyltrimethylammonium bromide to the prepared nanowire aqueous solution to make the mass concentration 0.75%, and stir at 30° C. for 15 minutes at a stirring speed of 500 rpm.

[0031] At room temperature, test the settling time and the absorbance of 1h through the nickel nanowire suspension of dispersion treatment, its value is respectively 19min and 0.693, compared with the nickel nanowire suspension that is not processed by this dispersion method under the same conditions, its The settling time was prolonged by 111%, and the absorbance was increased by 21.15%, that i...

Embodiment 3

[0033] (1) Configure surface treatment solution: 0.3mol / L sulfuric acid solution;

[0034] (2) Place the nickel nanowires in the surface treatment solution, and mechanically stir for 5 minutes at 70° C., with a stirring rate of 600 rpm;

[0035] (3) After repeatedly washing the nickel nanowires to neutrality, prepare an aqueous solution of nickel nanowires with a mass concentration of 0.05%;

[0036] (4) Add cetyltrimethylammonium bromide to the prepared nanowire aqueous solution to make the mass concentration 0.1%, and stir at 40° C. for 15 minutes at a stirring speed of 600 rpm.

[0037] At room temperature, test the settling time and the absorbance of 1h through the nickel nanowire suspension of dispersion treatment, its value is respectively 22min and 0.711, compares with the nickel nanowire suspension that is not processed by this dispersion method under the same condition, and its The settling time was extended by 144%, and the absorbance was increased by 24.3%, that is...

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Abstract

The invention provides a dispersion method for surface non-covalent modification of a nickel nanowire, and belongs to the field of dispersion of nickel nanowires. The dispersion method comprises the following steps: surface treatment solution of the nickel nanowire is prepared; the nickel nanowire is added in the surface treatment solution for constant-temperature stirring to remove an oxide layer; after the nickel nanowire is repeatedly washed to become neutral, water solution of the nickel nanowire is prepared; a proper amount of surfacant is added in the water solution of the nickel nanowire; and the constant-temperature stirring is performed. The dispersion method uses hexadecyl trimethyl ammonium bromide, belonging to cation surfacant, as a dispersing agent to be easily bonded with the nickel nanowire with negative electricity on the surface in the neutral water solution, so that the surface energy of the nickel nanowire is largely reduced, the nickel nanowire can be uniformly dispersed more stably, and the easy agglomerating or winding problem of the nickel nanowire in the water solution is solved; and the dispersion method is gentle, simple in operation, convenient, low in cost, excellent in effect and broad in application prospect.

Description

technical field [0001] The invention belongs to the field of dispersion of nickel nanowires, in particular to a dispersion method for non-covalent modification of the surface of nickel nanowires. technical background [0002] For major concrete structures and infrastructures under construction or already built (such as super high-rise buildings, cross-sea bridges, large oil production platforms and nuclear power plants, etc.), it is urgent to adopt effective monitoring methods to assess their health status, so as to repair and control damage in time , to ensure the reliability, safety and durability of the project. The construction of a health monitoring system for major concrete structures and infrastructure requires intelligent sensing elements with high performance, long life and stability. Self-sensing cement-based composites can effectively diagnose and monitor the stress, strain or damage of concrete structures through changes in macroscopic electrical properties, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/00B22F9/16B22F1/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/00B22F9/16B22F1/07
Inventor 徐金霞曹亚龙张长宽蒋林华冯伟宋迎宾单鸿猷
Owner HOHAI UNIV
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