Method for preparing polymer superhydrophobic surface using controlled etched metal surface as template

A technology of superhydrophobic surface and metal surface, applied in the field of preparing polymer superhydrophobic surface, can solve the problems of insufficient rigidity, easy aging, affecting large-scale application, etc., and achieve the effect of low cost and simple process

Inactive Publication Date: 2009-10-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the low tear strength, easy aging and insufficient rigidity of the elastic template itself, its large-scale application is affected
Some people have also used metallographic sandpaper, porous alumina, and nickel obtained by electroforming as templates to prepare polymer superhydrophobic surfaces, but there are still some problems to be solved in terms of template durability, repeatability, and ease of template preparation. The problem

Method used

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  • Method for preparing polymer superhydrophobic surface using controlled etched metal surface as template
  • Method for preparing polymer superhydrophobic surface using controlled etched metal surface as template
  • Method for preparing polymer superhydrophobic surface using controlled etched metal surface as template

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Immerse the sheet stainless steel (length and width: 2×2cm, thickness: 2.4mm) into deionized water and ultrasonically (40kHZ, 30min) to clean the surface dirt, then wash with acetone to remove the surface organic impurities, and finally wash with deionized water and let it dry naturally dry, spare;

[0042] Put the cleaned stainless steel into FeCl 3 : 600g / L, HCl: 80g / L, H 3 PO 4 : 20g / L, H 2 NCSNH 2 : In 4g / L aqueous solution. At 30°C, 60r / min, agitate for 30min, take it out and wash it with deionized water. The stainless steel surface is distributed with pits of tens to hundreds of microns, and each pit is densely distributed with small pits with a width of about 1 μm and a length of about 3 to 5 μm ( figure 1 a, b, c). At 180°C, 15g / cm 2 Melting and hot pressing LDPE (0.5g) (low density polyethylene, Shanghai Petrochemical, N220) under high pressure for 10 minutes, peeling off after cooling to obtain LDPE film (thickness: 0.6mm), this film well replicates th...

Embodiment 2

[0044] Immerse the sheet stainless steel (length and width: 2×2cm, thickness: 2.4mm) into deionized water and ultrasonically (40kHZ, 30min) to clean the surface dirt, then wash with acetone to remove the surface organic impurities, and finally wash with deionized water and let it dry naturally dry, spare;

[0045] Put the cleaned stainless steel into FeCl 3 : 600g / L, HCl: 80g / L, H 3 PO 4 : 20g / L, H 2 NCSNH 2 : In 4g / L aqueous solution. At 50°C, 120r / min, etch for 4h, take it out, wash it with deionized water, and dry it. The surface of this stainless steel is etched more seriously, and the surface is uneven ( figure 2 a, b, c). At 180°C, 15g / cm 2 Melting and hot-pressing PP (0.5g) (polypropylene, China Zhenhai Refining & Chemical Co., Ltd., T30S) under high pressure for 10min, peeling off after cooling to obtain PP (thickness: 0.6mm) film ( figure 2 d, e, f). A large number of micron and submicron papillae are distributed on the surface of this PP film. The contac...

Embodiment 3

[0047] Immerse flake brass (length and width: 2×2cm, thickness: 3.1mm) into deionized water and ultrasonically (40kHZ, 30min) to clean the surface dirt, then clean with acetone to remove surface organic impurities, and finally clean with deionized water, nitrogen blow dry, spare;

[0048] Put the cleaned brass into FeCl 3 : 400g / L, HCl: 80g / L aqueous solution, etched for 1.5h, taken out, washed with deionized water, and dried. After the brass sheet was etched, a large number of "rock"-like protrusions of tens of microns were evenly distributed on the surface ( image 3 a, b, c). At 180°C, 15g / cm 2 Melt and heat press LDPE (0.5g) under pressure for 10min, peel off after cooling to obtain LDPE (thickness: 0.6mm) film. A large number of elongated papillae ( image 3 d, e, f), the contact angle with water is 152±2.1°, and the rolling angle is ~5°.

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Abstract

The invention provides a method for preparing polymer superhydrophobic surface using controlled etched metal surface as template. The method comprises: (1) cleaning metal surface and drying; (2) immersing the cleaned metal into chemical etching liquid at 1-90 degrees centigrade, standing or stirring in speed of 60-120r/min to react for 1min-2h, taking out, washing by deionized water and drying; (3) using the metal surface etched in the step (2) as template, hot pressing the thermoplastic polymer on the template surface, cooling, and peeling the shaped polymer to obtain the material with superhydrophobic surface. Compared with the present methods for preparing polymer superhydrophobic surface, the invention achieves the advantages of simple process, repeatedly-usable template, low cost and no harmful organic solvent used in preparation process; can be combined with flow casting method film production technology in industrial; and have excellent prospect of large-scale production.

Description

(1) Technical field [0001] The invention relates to a method for preparing a polymer super-hydrophobic surface by using a controllable etched metal surface as a template. (2) Background technology [0002] A superhydrophobic surface refers to a surface on which water droplets have a static contact angle ≥ 150° and a rolling angle ≤ 10°. This type of surface has attracted much attention because of its broad application prospects in anti-fog, drag reduction, and anti-pollution. At present, there are many methods for preparing superhydrophobic surfaces, such as sol-gel method, solvent-induced phase separation method, metal etching method, and template method. Among them, the template method has become a research hotspot because it has the application prospect of large-scale mass production, and is simple, fast and environmentally friendly. [0003] Someone used polydimethylsiloxane (PDMS) with a characteristic microstructure on the surface as an elastic stamp, and made a poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/02C23F1/16
Inventor 冯杰钱欣黄明达
Owner ZHEJIANG UNIV OF TECH
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