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Preparation method of durable PDMS (polydimethylsiloxane) bionic super-hydrophobic membrane

A super-hydrophobic and durable technology, applied in the field of preparation of durable PDMS biomimetic super-hydrophobic membrane, can solve the problems of complex process, high cost and low efficiency, and achieve the effect of reducing manufacturing cost, reducing usage and low price

Active Publication Date: 2018-07-20
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The invention provides a method for preparing durable PDMS biomimetic superhydrophobic membranes, aiming at the disadvantages of complicated process, high cost, and low efficiency in the existing preparation of superhydrophobic smart materials.

Method used

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  • Preparation method of durable PDMS (polydimethylsiloxane) bionic super-hydrophobic membrane
  • Preparation method of durable PDMS (polydimethylsiloxane) bionic super-hydrophobic membrane
  • Preparation method of durable PDMS (polydimethylsiloxane) bionic super-hydrophobic membrane

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Embodiment 1

[0016] Embodiment 1: a kind of preparation method of durable PDMS biomimetic superhydrophobic film, specifically comprises the following steps:

[0017] (1) Cleaning of the stainless steel mesh: First, place the stainless steel mesh with a pore size of 15 µm in a hydrochloric acid solution with a concentration of 0.5mol / l for ultrasonic cleaning for 5 minutes, then ultrasonically clean it with deionized water until it is neutral, and dry it;

[0018] (2) Preparation of SiO 2 Nanoparticle-coated stainless steel mesh: SiO 2 Nanoparticles were dispersed into ethanol solution to prepare a suspension, in which SiO 2 The mass fraction of nanoparticles is 0.1%, ultrasonically dispersed for 5 minutes, and the cleaned stainless steel mesh is immersed in SiO 2 Nanoparticle suspension, slowly pulled out, and dried;

[0019] (3) Preparation of PDMS base film: pour the PDMS solution prepared by polydimethylsiloxane PDMS and Sylgard 184 silicone rubber curing agent at a mass ratio of 10:...

Embodiment 2

[0022] Embodiment 2: a kind of preparation method of durable PDMS biomimetic superhydrophobic film, specifically comprises the following steps:

[0023] (1) Cleaning of the stainless steel mesh: First, place the stainless steel mesh with a pore size of 30 μm in a hydrochloric acid solution with a concentration of 1.0 mol / l for ultrasonic cleaning for 30 minutes, then ultrasonically clean it with deionized water until it is neutral, and dry it;

[0024] (2) Preparation of SiO 2Nanoparticle-coated stainless steel mesh: SiO 2 Nanoparticles were dispersed into ethanol solution to prepare a suspension, in which SiO 2 The mass fraction of nanoparticles was 1.0%, ultrasonically dispersed for 15 minutes, and the cleaned stainless steel mesh was immersed in SiO 2 Nanoparticle suspension, slowly pulled out, and dried;

[0025] (3) Preparation of PDMS base film: pour the PDMS solution prepared by polydimethylsiloxane PDMS and Sylgard 184 silicone rubber curing agent at a mass ratio of...

Embodiment 3

[0027] Embodiment 3: a kind of preparation method of durable PDMS biomimetic superhydrophobic film, specifically comprises the following steps:

[0028] (1) Cleaning of the stainless steel mesh: First, place the stainless steel mesh with a pore size of 8 µm in a hydrochloric acid solution with a concentration of 0.1mol / l for ultrasonic cleaning for 60 minutes, then ultrasonically clean it with deionized water until it is neutral, and dry it;

[0029] (2) Preparation of SiO 2 Nanoparticle-coated stainless steel mesh: SiO 2 Nanoparticles were dispersed into ethanol solution to prepare a suspension, in which SiO 2 The mass fraction of nanoparticles was 3.0%, ultrasonically dispersed for 30 minutes, and the cleaned stainless steel mesh was immersed in SiO 2 Nanoparticle suspension, slowly pulled out, and dried;

[0030] (3) Preparation of PDMS base film: pour the PDMS solution prepared by polydimethylsiloxane PDMS and Sylgard 184 silicone rubber curing agent at a mass ratio of ...

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Abstract

The invention belongs to the technical field of functional material preparation, aims to overcome defects of complicated process, higher cost, low efficiency and the like of conventional preparation of an intelligent super-hydrophobic material and provides a preparation method of a durable PDMS (polydimethylsiloxane) bionic super-hydrophobic membrane. The method comprises steps as follows: a stainless steel mesh is put in a hydrochloric acid solution and deionized water, is subjected to ultrasonic cleaning and then is air-dried; the air-dried stainless steel mesh is soaked in a SiO2 nanoparticle suspension, and a stainless steel mesh coated with SiO2 nanoparticles is prepared; a PDMS solution is poured on a substrate material and heated, and a PDMS substrate membrane is prepared; the stainless steel mesh coated with SiO2 nanoparticles is embossed on the surface of the PDMS substrate membrane, the stainless steel mesh is uncovered after curing, and the durable PDMS bionic super-hydrophobic membrane is obtained. The preparation method is simple and easy, has shorter period, and is suitable for large-scale production, a static contact angle for water is 150-160 degrees, and a rollingcontact angle is 5-10 degrees.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a preparation method of a durable PDMS bionic superhydrophobic membrane. Background technique [0002] Superhydrophobic surface means that the contact angle of water droplets on the solid surface is greater than 120º. Super-hydrophobic interfaces are very common in nature. For example, the contact angle of a water droplet on a rose petal exceeds 150°. However, even if the petal is turned upside down, the water droplet can adhere tightly to the petal. On the contrary, the contact angle of a water droplet on a lotus leaf is about 156º, water droplets can easily slide off the surface of the lotus leaf and take away surface pollutants to achieve self-cleaning effect. This phenomenon is called "lotus leaf effect". [0003] Inspired by the "lotus leaf effect" in nature, biomimetic superhydrophobic membrane materials based on metals, inorganic ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/36C08J5/18
CPCC08J5/18C08J2383/04C08K3/36C08K2201/011
Inventor 潘子鹤曹思静李剑锋杜志平程芳琴
Owner SHANXI UNIV
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