Super-hydrophobic high-density polyethylene film preparation method

A high-density polyethylene and super-hydrophobic technology is applied in the field of preparing super-hydrophobic high-density polyethylene films, which can solve the problems of expensive materials and difficult industrialization, and achieve stable super-hydrophobic properties, good reproducibility and simple operation process. Effect

Inactive Publication Date: 2010-06-16
袁志庆 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these existing methods either use expensive materials, or require special processing equipment or complex processes, making it difficult to industrialize

Method used

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  • Super-hydrophobic high-density polyethylene film preparation method
  • Super-hydrophobic high-density polyethylene film preparation method
  • Super-hydrophobic high-density polyethylene film preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] First, weigh 0.3 g of high-density polyethylene particles and dissolve them in 30 ml of xylene at 120 ° C to form a high-density polyethylene solution with a concentration of 10 mg / ml; then add 3 ml of absolute ethanol to the high-density polyethylene solution; Spread the high-density polyethylene solution added with ethanol on the glass substrate, and dry it for 10 hours at a relative humidity of 75% and a temperature of 5°C. The resulting white film is a superhydrophobic high-density polyethylene film. see figure 1 and figure 2 , tested the wettability of the film surface with OCA20 contact angle tester, the result showed that the contact angle between the surface and water was 160±1.9°. The surface morphology of the film was observed with a HITACHI S-3000N scanning electron microscope, and it was found that the film was composed of numerous irregular leaf-shaped high-density polyethylene sheets.

Embodiment 2

[0020] First, take 0.3 g of high-density polyethylene particles and dissolve them in 30 ml of xylene at 100° C. to form a high-density polyethylene solution with a concentration of 10 mg / ml; then add 3 ml of 95% ethanol to the high-density polyethylene solution; The high-density polyethylene solution added with 95% ethanol is flowed on the ceramic substrate by casting method, and dried for 8 hours in an environment with a relative humidity of 60% and a temperature of 25°C, and the obtained white film is superhydrophobic high-density polyethylene. vinyl film. The wettability of the surface of the film was tested with an OCA20 contact angle tester, and the result showed that the contact angle between the surface and water was 150±1.9°. The surface morphology of the film was observed with a HITACHI S-3000N scanning electron microscope, and it was found that the film was composed of numerous irregular leaf-shaped high-density polyethylene sheets.

Embodiment 3

[0022] First, weigh 0.03 g of high-density polyethylene particles and dissolve them in 30 ml of xylene at 140 ° C to form a high-density polyethylene solution with a concentration of 1 mg / ml; then add 0.3 ml of absolute ethanol to the high-density polyethylene solution; The high-density polyethylene solution added with ethanol is flowed on the metal substrate by the casting method, and dried for 10 hours at a relative humidity of 70% and a temperature of 20 ° C. The resulting white film is a super-hydrophobic high-density polyethylene film. The wettability of the surface of the film was tested with an OCA20 contact angle tester, and the result showed that the contact angle between the surface and water was 155±1.9°. The surface morphology of the film was observed with a HITACHI S-3000N scanning electron microscope, and it was found that the film was composed of numerous irregular leaf-shaped high-density polyethylene sheets.

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Abstract

The present invention discloses a super-hydrophobic high-density polyethylene thin film and a preparation method thereof. A certain amount of high-density polyethylene particles are firstly weighed and dissolved in xylene at 100 to 140 DEG C, so as to form the high-density polyethylene solution with the concentration of 1 to 50mg / ml; then 1 percent to 60 percent of the volume of the solution of ethanol is added in the high-density polyethylene solution; the high-density polyethylene solution which is added with the ethanol is spread on a foundation base by using a flow casting method, and a white thin film which is prepared by drying for 8 to 12 hours under the environment of the relative humidity of 60 to 75 percent and the temperature of 5 to 25 DEG C is the super-hydrophobic high-density polyethylene thin film. The present invention is the super-hydrophobic high-density polyethylene thin film with simple production, stable performance and low cost. The provided method has simple operating process, good controllability, low cost, no need of complicated chemical treatments, no need of the expensive equipments and easy industrialization.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophobic high-density polyethylene film in an atmospheric environment. Background technique [0002] It is well known that the wettability of a solid surface is determined by the chemical composition and surface roughness of the surface. The contact angle on the smooth solid surface with the lowest surface energy can only be increased to 120°C at most, while there are a large number of superhydrophobic surfaces in the natural environment (the contact angle between the surface of the material and water is greater than 150°, and the water droplets have a relatively large surface area on the surface. Small rolling angle), the most typical is the surface of the lotus leaf. Water droplets usually form shiny spherical water droplets on the surface of the lotus leaf. These water droplets cannot stay on the surface of the lotus leaf stably. Shake the lotus leaf, and the water droplets on the surface wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L23/06
Inventor 袁志庆陈洪
Owner 袁志庆
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