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Method for preparing polymer superhydrophobic surface by CaCO3 template method

A super-hydrophobic surface and polymer technology, which is applied in the field of preparing polymer super-hydrophobic surfaces, can solve the problems of difficulty in preparing large-area super-hydrophobic films, expensive raw materials or equipment, and limited practical applications, etc., to achieve easy large-area preparation, The effect of simple method and wide application value

Inactive Publication Date: 2011-06-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials or equipment used in these methods are relatively expensive, or the preparation conditions are harsh, time-consuming and labor-intensive, especially it is difficult to prepare large-area super-hydrophobic films, which limits their practical applications.

Method used

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  • Method for preparing polymer superhydrophobic surface by CaCO3 template method
  • Method for preparing polymer superhydrophobic surface by CaCO3 template method
  • Method for preparing polymer superhydrophobic surface by CaCO3 template method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] CaCO on glass substrate 3 Thin layer preparation: carve a frame with a size of 4cm*4cm on a polydimethylsiloxane (PDMS) sheet with a blade, and stick it on a clean hydrophilic glass sheet with double-sided adhesive. Then weigh 10g of CaCO 3 Granules (1500 mesh) were made into an aqueous suspension with a solid content of 10%. Take 5mL of the suspension and pour it on a glass slide, put it in an oven, bake it at 160°C for 5 minutes, and take it out to obtain a layer of CaCO on the surface. 3 Thin glass substrate.

[0031] Hot pressing LLDPE on the glass substrate: stack a layer of LLDPE particles (linear low-density polyethylene, Shanghai Secco Petrochemical Co., Ltd.) with a thickness of about 3mm on the prepared glass substrate, and put it together with another piece of clean glass Heat it in an oven at 200°C for 10 minutes, then cover the clean glass plate on the molten LLDPE, clamp it with two clamps, keep it in the oven for 10 minutes, take it out, and cool it to ...

Embodiment 2

[0034] CaCO on glass surface 3 Thin layer preparation is as in Example 1.

[0035] Hot pressing LDPE on the glass substrate: stack a layer of LDPE particles (low density polyethylene, Shanghai Petrochemical, N220) with a thickness of about 6mm on the glass substrate prepared above, and put it into a 200°C oven together with another clean glass plate Heat it in the middle for 10 minutes, then cover the clean glass plate on the LDPE, clamp it with two clamps, keep it in the oven for another 5 minutes, take it out, and cool it to shape.

[0036] CaCO 3 - Acid etching of LDPE: Lifting of CaCO on cooled glass substrate 3 - LDPE film, put it in 30% hydrochloric acid solution, let it stand for 30 minutes, dry it with nitrogen gas after washing to get super-hydrophobic film, see surface microstructure and static water contact angle Figure 4 .

Embodiment 3

[0038] CaCO on glass surface 3 Thin layer preparation is as in Example 1.

[0039]Hot pressing of HDPE on the glass substrate: pile up a layer of HDPE particles (high-density polyethylene, Shanghai Secco Petrochemical Co., Ltd.) with a thickness of about 5mm on the prepared glass substrate, and put it together with another clean glass plate Heat it in an oven at 200°C for 10 minutes, then cover the clean glass plate on the HDPE, clamp it with two clips, keep it in the oven for another 5 minutes, take it out, and cool it to shape.

[0040] CaCO 3 - Acid etching of HDPE: Lifting of CaCO on cooled glass substrate 3 -HDPE film, put it into 30% hydrochloric acid solution, let it stand for 30 minutes, dry it with nitrogen after washing to get super-hydrophobic film, surface microstructure and static water contact angle see Figure 5 , the rolling photos of water droplets on the surface are shown in Figure 6 .

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Abstract

The invention provides a method for preparing a polymer superhydrophobic surface by a CaCO3 template method, comprising the following steps of: firstly adhering a thin CaCO3 layer with the thickness of 0.1 to 20mm and the particles of 800 to 3000 meshes on a plane or a roll surface base; then hot pressing a polymer on the thin CaCO3 layer, and after peeling off a composite layer, and finally immersing the polymer in an acid liquor to corrode the calcium carbonate particles on the surface of the polymer, thus obtaining the polymer superhydrophobic surface with irregular network structure. The invention mainly has the following beneficial effects that the method has simple operation technology, low cost, high efficiency, and good controllability and repeatability, furthermore, the method iseasy for large-area preparation, and provides a simple and effective way for the industrialization of the superhydrophobic surface, thus having wide application value and broad market prospect.

Description

(1) Technical field [0001] The present invention relates to a CaCO 3 A method for preparing superhydrophobic surfaces of polymers by template method. (2) Background technology [0002] In recent years, with the improvement of people's quality of life requirements, superhydrophobicity and self-cleaning phenomena in nature have attracted widespread attention. A superhydrophobic surface generally refers to a surface with a static contact angle of greater than 150° and a rolling angle of less than 10° with water. Research results have shown that micro-nanostructures are necessary for the formation of superhydrophobic surfaces. Since superhydrophobic surfaces have broad application prospects in waterproof, antifog, snowproof, dustproof, etc., people have developed a variety of technologies to construct superhydrophobic surfaces. At present, there are many methods for artificially preparing superhydrophobic surfaces, such as etching, phase separation and self-assembly, hydrother...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C59/02
Inventor 冯杰钟明强郑建勇
Owner ZHEJIANG UNIV OF TECH
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