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Directional arrangement method of halloysite nanotubes and coating and application of halloysite nanotubes

A halloysite nanotube, directional arrangement technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing and other directions, can solve the problems of uneven thickness, easy casting to the substrate, inability to apply natural inorganic nanomaterials, etc. Simple, reproducible results with unlimited substrate area

Active Publication Date: 2015-03-04
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned existing technologies use organic solvents as the dispersion medium, which brings environmental burdens. Some of them need to build a closed and confined space, which is prone to adverse effects such as uneven thickness and easy flow outside the substrate, and the materials used are mostly organic nanometers. materials or synthetic inorganic nanomaterials, which cannot be applied to natural inorganic nanomaterials

Method used

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  • Directional arrangement method of halloysite nanotubes and coating and application of halloysite nanotubes
  • Directional arrangement method of halloysite nanotubes and coating and application of halloysite nanotubes
  • Directional arrangement method of halloysite nanotubes and coating and application of halloysite nanotubes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) The substrates are two glass slides with a size of 2.5cm×7.5cm, washed with detergent powder and deionized water for 5 minutes, and dried with nitrogen gas flow for 10 minutes;

[0039] (2) Weigh 0.05g of HNTs powder (mesh 100, produced in Hunan) in 100mL of deionized water, and ultrasonically disperse for 30min to obtain HNTs aqueous suspension;

[0040] (3) build as figure 1 In the drying device shown, the gasket is a glass gasket, the length of the gasket is 25.4mm, which is the same as or slightly wider than the width of the substrate; the width is 5mm, and the thickness is 0.8mm;

[0041] (4) Use a glass syringe to draw the HNTs water suspension, and carefully inject it into the space formed by the two glass slides until it is full;

[0042] (5) Put the above-mentioned device in an environment with a humidity of 50% and a temperature of 30° C., and obtain a coating of HNTs aligned on a glass slide after evaporation and drying;

[0043] (6) The substrate sampl...

Embodiment 2

[0045] (1) The substrates are two silicon wafers with a smooth surface, the size is 2.5cm×5cm, washed with deionized water for 3 minutes, and dried with nitrogen gas flow for 10 minutes;

[0046] (2) Weigh 0.5g of HNTs powder in 100mL of deionized water, and ultrasonically disperse at 300W power for 30min to obtain HNTs suspension;

[0047] (3) build as figure 1 In the confined space drying device shown, the spacer is a glass spacer, and the length of the spacer is 25.4mm, which is the same as or slightly wider than the width of the substrate; the width is 10mm, and the thickness is 1.0mm;

[0048] (4) Draw the HNTs aqueous suspension with a glass syringe, and carefully inject it into the space formed in step (3) until it is filled;

[0049] (5) Place the above device in an environment with a humidity of 80% and a temperature of 35° C., and obtain an oriented HNTs coating on the silicon wafer substrate after evaporation and drying;

[0050] (6) The substrate samples coated w...

Embodiment 3

[0052] (1) The substrates are two stainless steel sheets with smooth surfaces, the size is 2.5cm×7.5cm, after cleaning with cotton dipped in ethyl ester, dry with nitrogen air flow for 5min;

[0053] (2) Weigh 1 g of HNTs powder in 100 mL of deionized water, and disperse with 150 W ultrasonic for 60 min to obtain HNTs suspension;

[0054] (3) build as figure 1 In the confined space drying device shown, the spacer is a glass spacer, and the length of the spacer is 25.4mm, which is the same as or slightly wider than the width of the substrate; the width is 15mm, and the thickness is 1.2mm;

[0055] (4) Draw the HNTs aqueous suspension with a glass syringe, and carefully inject it into the space formed in step (3) until it is filled;

[0056] (5) The above device was placed in an environment with a humidity of 40% and a temperature of 25° C., and after evaporation and drying, an aligned HNTs coating was obtained on a stainless steel substrate.

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Abstract

The invention belongs to the technical field of nanometer surface preparation and discloses a directional arrangement method of halloysite nanotubes and a coating and application of the halloysite nanotubes. The directional arrangement method comprises the following specific steps: (1) constructing a restricted evaporation space device, namely oppositely placing planes of two substrates, and clamping gaskets uniform in height between two sides in the middle to form a middle restricted evaporation space position; (2) injecting a halloysite nanotube aqueous suspension into the space position of the restricted evaporation space device in the step (1); (3) horizontally standing the device filled with the halloysite nanotube aqueous suspension to obtain a directionally arranged halloysite nanotube coating on the surfaces of the substrates after the suspension is subjected to restricted gradual evaporation. According to the preparation method, water is used as a dispersing medium, so that environment pollution is avoided; an airtight restricted space does not need to be constructed, so that the adverse effect that the coating thickness is difficult to control to cause that the coating is easy to flow out of the substrates is avoided, and the large-range directional arrangement of natural inorganic nanomaterials (halloysite nanotubes) on multiple substrate materials is realized.

Description

technical field [0001] The invention belongs to the technical field of nanometer surface preparation, and in particular relates to a method for aligning halloysite nanotubes and its coating and application. Background technique [0002] One-dimensional nanotubular materials exhibit many excellent and unique properties, such as super mechanical strength, higher drug loading efficiency, enhanced biocompatibility, etc. The research on them is a very active field in the field of nanotechnology. Assembling one-dimensional nanomaterials into aggregates with specific geometric shapes, or confining them to achieve specific orientations will bring new overall synergistic effects to one-dimensional nanomaterials. This is of great significance to the development of nanoelectronics and biological detection devices based on one-dimensional nanomaterials. However, due to the anisotropy of one-dimensional nanomaterials, it is difficult to assemble them directly. So far, the arrangement o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00B82B1/00B82Y30/00B82Y40/00
Inventor 刘明贤周长忍
Owner JINAN UNIVERSITY
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