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Preparation method for fluoride-free, non-toxic, economic and efficient aluminium-based superhydrophobic material

A super-hydrophobic and economical technology, which is applied in the field of preparation of aluminum-based super-hydrophobic materials, can solve the problems of expensive, toxic, and not necessarily durable super-hydrophobic properties, and achieve cheap raw materials, good anti-adhesion properties, and improved corrosion resistance. Effect

Inactive Publication Date: 2016-09-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The methods mentioned above all achieve superhydrophobic properties on metal-based materials, but like most of the preparation methods, expensive and toxic fluorine-containing modifiers are used, and they are not suitable for complex daily life and industrial production environments. Must be durable superhydrophobic properties

Method used

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  • Preparation method for fluoride-free, non-toxic, economic and efficient aluminium-based superhydrophobic material
  • Preparation method for fluoride-free, non-toxic, economic and efficient aluminium-based superhydrophobic material
  • Preparation method for fluoride-free, non-toxic, economic and efficient aluminium-based superhydrophobic material

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Effect test

Embodiment 1

[0032] The specific operation steps of the preparation method of the aluminum-based superhydrophobic material provided by the invention are as follows:

[0033] (1) A 3 cm x 3 cm aluminum plate was polished with sandpaper until the surface was smooth to remove the oxide layer, and then ultrasonicated with absolute ethanol and deionized water for 5 min to remove the dirt on the surface of the aluminum plate.

[0034] (2) Put the clean aluminum plate in 2.5 M hydrochloric acid for 8 min, boil in boiling water for 15 min, and dry the treated aluminum plate in a vacuum oven at 50 °C for 30 min before use.

[0035] (3) Dissolve 1 g of polydimethylsiloxane and 0.1 g of curing agent (PDMS and its curing agent is SYLGARD184 product of Dowcorning Company) at a mass ratio of 10:1 in 25 mL of n-hexane, and spin-coat Spin-coat a layer of polydimethylsiloxane solution on the aluminum surface treated in step (2). The rotation speed of the spin coater was 3000 r / min, and the spin coat time ...

Embodiment 2

[0039] (1) A 3 cm x 3 cm aluminum plate was polished with sandpaper until the surface was smooth to remove the oxide layer, followed by ultrasonication with absolute ethanol and deionized water for 5 min to remove the dirt on the surface of the aluminum plate.

[0040] (2) Put the clean aluminum plate into 1 M hydrochloric acid for etching for 20 min, boil in boiling water for 40 min, and dry the treated aluminum plate in a vacuum oven at 100 °C for 30 min before use.

[0041] (3) Dissolve 1 g of polydimethylsiloxane and 1 g of curing agent (PDMS and its curing agent are SYLGARD184 products of Dowcorning Company) in 60 mL of n-hexane, and spin-coat after step (2) Spin-coat a layer of polydimethylsiloxane solution on the treated aluminum surface. The rotation speed of the spin coater was 3000 r / min, and the spin coat time of the coater was 60 s.

[0042] (4) Put the sample treated in step (3) into a vacuum drying oven, and cure it at 80 °C for 5 h to obtain a fluorine-free, non-...

Embodiment 3

[0045] (1) A 3 cm x 3 cm aluminum plate was polished with sandpaper until the surface was smooth to remove the oxide layer, followed by ultrasonication with absolute ethanol and deionized water for 5 min to remove the dirt on the surface of the aluminum plate.

[0046] (2) Put the clean aluminum plate into 4 M hydrochloric acid for etching for 2 min, boil in boiling water for 5 min, and dry the treated aluminum plate in a vacuum oven at 30 °C for 40 min before use.

[0047] (3) Dissolve 1 g of polydimethylsiloxane and 0.05 g of curing agent (PDMS and its curing agent is the SYLGARD184 product of Dowcorning Company) in n-hexane, and spin-coat on the surface treated in step (2). A layer of polydimethylsiloxane solution was spin-coated on the aluminum surface. The rotation speed of the spin coater was 8000 r / min, and the spin coat time of the coater was 20 s.

[0048] (4) Put the sample treated in step (3) into a vacuum drying oven and cure it at 120 °C for 0.5 h to obtain a flu...

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Abstract

The invention discloses a preparation method for a fluoride-free, non-toxic, economic and efficient aluminium-based superhydrophobic material. The preparation method comprises the following steps: stably obtaining a micrometer-nanometer binary composite graded structure from aluminium and aluminium alloy through simple hydrochloric acid etching and water boiling sequentially; spin-coating a layer of fluoride-free, non-toxic and cheap polydimethylsiloxane solution on the micrometer-nanometer graded aluminium-based surface by virtue of a spin-coating method, curing and then forming an organic film layer, and thus achieving a superhydrophobic surface having a contact angle of 158 degrees with water and having a rolling angle of 2 degrees. The superhydrophobic surface is superhydrophobic with strong acid and strong base, and has high lasting stability due to the protection effect of the organic film layer. The superhydrophobic surface disclosed by the invention has the characteristics of being fluoride-free, non-toxic, simple and convenient to operate, economic and efficient.

Description

Technical field [0001] The invention involves the field of ultra -hydrophobic materials, which specifically involves a method of preparation of fluoride, non -toxic, economical, and efficient aluminum -based hydrophilic materials. Background technique [0002] The self -cleaning ability on the surface of the lotus leaf has caused great interest in people, inspiring scientists to conduct a series of research.BARTHLOTT and Neinhuis first reported that the slide phenomenon of water droplets on the surface of the lotus leaf is related to the special mastoid structure and low -surface energy material covered on the special structure.The experimental results of L.Jiang and other experiments further explained that the micrometer and nanometer binary composite structures are the structural basis with more than 150 ° contact angle on the surface of the lotus leaf and below the 10 ° rolling angle.Based on these theoretical foundations, scientists have invented many preparation methods for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/00B05D3/02B05D1/28C23F1/20
CPCB05D3/00B05D1/28B05D3/02B05D2202/25C23F1/20
Inventor 邓文礼龙梦影彭珊陈佳琪
Owner SOUTH CHINA UNIV OF TECH
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