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Method for preparing carbon/zinc oxide super-hydrophobic ceramic by sintering plant leaves

A technology of plant leaves and zinc oxide, which is applied in the field of preparing carbon/zinc oxide superhydrophobic ceramics, can solve the problems such as difficulty in obtaining ceramic superhydrophobic materials, and achieve the effect of excellent superhydrophobic performance

Inactive Publication Date: 2013-03-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the replica method requires a flowable and curable substance to fill the mold, so this method can only obtain superhydrophobic materials of polymers, but it is difficult to obtain superhydrophobic materials of ceramics.

Method used

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  • Method for preparing carbon/zinc oxide super-hydrophobic ceramic by sintering plant leaves
  • Method for preparing carbon/zinc oxide super-hydrophobic ceramic by sintering plant leaves
  • Method for preparing carbon/zinc oxide super-hydrophobic ceramic by sintering plant leaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The lotus leaves were baked and dried in an oven at 100 °C for 48 hours, then heated to 200 °C at a rate of 2 °C / min in an argon atmosphere furnace, and then heated to 800 °C at a rate of 1 °C / min. A carbon ceramic with a lotus leaf microstructure is obtained; the carbon ceramic is then treated with a concentration of 1% Zn(NO 3 ) 2 Immerse in the solution for 2 minutes; take out the impregnated carbon ceramics and dry them; sinter the dried carbon ceramics in an argon atmosphere furnace at a heating rate of 3 °C / min to 150 °C to obtain a carbon with a lotus leaf microstructure. / Zinc oxide ceramics; figure 1 Shown is the X-ray diffraction pattern of the prepared ceramic, from the diffraction peaks it can be seen that the material contains carbon and zinc oxide. figure 2Shown is the scanning electron microscope photo of the microstructure of the prepared carbon / zinc oxide ceramic. It can be seen that the microstructure of the micro-nano protrusions on the surface of...

Embodiment 2

[0036] Put the zong leaves in an oven at 120 ℃ and dry them for 24 hours, then place them in a nitrogen atmosphere furnace and heat them up to 600 ℃ at a rate of 2 ℃ / min to prepare carbon ceramics with the microstructure of zong leaves; Carbon ceramics with a concentration of 3% Zn(NO 3 ) 2 Immerse in the solution for 5 minutes; take out the impregnated carbon ceramics and dry them; put the dried carbon ceramics in a nitrogen atmosphere furnace and sinter to 400 °C at a heating rate of 3 °C / min to obtain carbon with the microscopic structure of zong leaves. / zinc oxide ceramics; carbon / zinc oxide ceramics are soaked in 15% fluorosilane isopropanol solution by volume ratio for 10 days and then taken out to dry to obtain carbon / zinc oxide superhydrophobic ceramics with the microscopic structure of Zongye. Figure 4 Shown is the contact angle of the prepared carbon / zinc oxide superhydrophobic ceramics with water, θ 接触角 =162°, reaching superhydrophobicity.

Embodiment 3

[0038] The rice leaves were baked and dried in an oven at 70 °C for 72 hours, then placed in an argon atmosphere furnace and heated to 500 °C at a heating rate of 1 °C / min to obtain carbon ceramics with the microstructure of rice leaves; The carbon ceramics in the concentration of 5% Zn(NO 3 ) 2 Immerse in the solution for 3 minutes; take out the impregnated carbon ceramics and dry them; put the dried plant leaves in an argon atmosphere furnace and sinter them to 650°C at a heating rate of 3°C / min to obtain carbon ceramics with the microscopic structure of rice leaves. / zinc oxide ceramics; carbon / zinc oxide ceramics are soaked in a fluorosilane isopropanol solution with a volume ratio concentration of 10% for 7 days and then taken out to dry to obtain carbon / zinc oxide superhydrophobic ceramics with the microscopic structure of rice leaves. Figure 5 Shown is the contact angle of the prepared carbon / zinc oxide superhydrophobic ceramics with water, θ 接触角 =160°, reaching sup...

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Abstract

The invention relates to a method for preparing carbon / zinc oxide super-hydrophobic ceramic by sintering super-hydrophobic plant leaves, which is characterized in that super-hydrophobic plant leaves are used as preparation templates are sintered under the protection of a non-oxidizing atmosphere to obtain carbon ceramic having a leaf structure; the carbon ceramic is impregnated with a zinc nitrate solution and is sintered under the protection of a non-oxidizing atmosphere to obtain carbon / zinc oxide ceramic having a leaf structure; and the surface of the carbon / zinc oxide ceramic is modified with fluorosilane low-surface-energy substances, thus obtaining the carbon / zinc oxide super-hydrophobic ceramic having a leaf structure. According to the invention, the prepared carbon / zinc oxide super-hydrophobic ceramic well keeps the plant leaf microscopic structure, highly imitates the nature and has excellent super-hydrophobic property.

Description

technical field [0001] The invention belongs to a method for preparing carbon / zinc oxide superhydrophobic ceramics, in particular to a method for preparing carbon / zinc oxide superhydrophobic ceramics by sintering hydrophobic plant leaves. Background technique [0002] In production and life, many device parts are exposed to dusty, watery, and polluted environments all the year round. It is difficult to clean up after dust, moisture or impurities stick to them, and will affect the function of the device parts. Therefore, people also hope that these devices The components are superhydrophobic (the contact angle with water is greater than 150 degrees), thus realizing the self-cleaning function. The leaves of many plants in nature have superhydrophobicity, such as lotus leaves, rice leaves, peanut leaves, palm leaves, cabbage leaves, taro leaves, aster leaves, etc. If you look closely at these leaves, the surface is not smooth, but there are many fine micro-nano protrusions. W...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/52C04B35/453
Inventor 王天驰常丽静孔嵩庄丽敏贾阳杨森陈光
Owner NANJING UNIV OF SCI & TECH
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