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Ceramic-based biomimetic material as well as preparation method and application thereof

A biomimetic material, ceramic-based technology, applied in the field of biomimetic engineering and surface engineering, can solve the problems of microstructure size limitation, difficulty in constructing microscopic surface structure, and high cost.

Active Publication Date: 2021-02-09
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ceramic surfaces produced by these methods have the following problems or limitations in the geometry and size of microscopic features: 1. It is difficult to construct complex microscopic curved surface structures, 2. The size of microscopic structures is limited, usually less than 3 × 3cm, and often expensive

Method used

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  • Ceramic-based biomimetic material as well as preparation method and application thereof
  • Ceramic-based biomimetic material as well as preparation method and application thereof
  • Ceramic-based biomimetic material as well as preparation method and application thereof

Examples

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Embodiment 1

[0066] This embodiment provides a preparation method of a ceramic-based biomimetic material, the process of which is as follows figure 1 As shown, it specifically includes the following steps:

[0067] 1. Mix 10g of liquid PDMS and 1g of PDMS curing agent to obtain a PDMS mixture, stir it fully at 20°C, then cast it on the surface of rose petals, degas it in vacuum for 30 minutes, dry and cure at room temperature for 24 hours, and remove the cured PDMS from the surface of rose petals Separation to obtain the PDMS template;

[0068] 2. Prepare an aqueous solution of polyacrylic acid with a mass fraction of 2 wt%, and adjust the pH of the solution to 10 with ammonia water to obtain an alkaline solution of polyacrylic acid. Aluminum oxide powder was dispersed in polyacrylic acid alkaline solution to obtain a ceramic slurry with a solid volume fraction of 25%. Take 50cm 3 The ceramic slurry was ultrasonicated in a UP200Ht ultrasonic horn, the ultrasonic power was controlled to ...

Embodiment 2

[0078] According to the method and experimental parameters provided in Example 1, lotus leaves were used instead of rose petals to prepare ceramic-based biomimetic materials. Figure 4 Morphological characterization results of the lotus leaf and the ceramic-based biomimetic material prepared in this example. in, Figure 4 Figures a to c in the figure are the photos, SEM images and AFM images of lotus leaves, respectively. Figure 4 Figures d to f in the figure are the photos, SEM images and AFM images of ceramic-based biomimetic materials, respectively. From Figure 4 It can be seen that the ceramic-based biomimetic material obtained by the preparation method provided by the present invention can completely reproduce the micro-nano structure of the lotus surface.

Embodiment 3

[0080] According to the method and parameters provided in Example 1, use PMMA and polycraft K4 translucent silicone rubber instead of PDMS as resin templates to prepare ceramic-based biomimetic materials, specifically polycraft K4 translucent silicone rubber and polycraft K4 translucent silicone rubber with a mass ratio of 1:1. The mixed solution formed by the curing agent, or the PDMS in Step 1 of Example 1 is replaced by PMMA solution for preparation. Wherein, the process of solidifying the PMMA solution into a resin template includes: dissolving the dissolved PMMA in toluene to obtain a PMMA solution with a mass fraction of 15%, and spin-coating the PMMA solution onto a clean silicon wafer. The biomaterial is then placed on the PMMA surface under a slight pressure of about 0.2 to 0.3 MPa to keep the biomaterial in contact with the PMMA. Before applying pressure, a thin block of PDMS can be placed on top of the biological surface as a buffer to evenly distribute the pressure...

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Abstract

The invention provides a ceramic-based biomimetic material as well as a preparation method and application thereof. The preparation method comprises the following steps of: casting the surface of a biological material with liquid resin, and separating the resin from the biological material after curing the resin to obtain a resin template; pouring ceramic slurry into the resin template, and dryingand molding the ceramic slurry at 80-90% RH to obtain a green body; and heating the green body at a rate of 1-1.5 K.min <-1> for presintering the green body, and then heating the green body at a rateof 10-15K.min <-1> for sintering the green body to obtain the ceramic-based biomimetic material. The invention also provides the ceramic-based biomimetic material prepared by the method and application of the ceramic-based biomimetic material as an underwater oleophobic material. The ceramic-based biomimetic material provided by the invention can show excellent super-oleophobic performance on different oil products, and has good stability, corrosion resistance, impact resistance and a long service life.

Description

technical field [0001] The invention relates to the technical fields of bionic engineering and surface engineering, in particular to a ceramic-based bionic material and its preparation method and application. Background technique [0002] In the marine ecosystem, oil pollution caused by industrial accidental oil spills, social production activities, and scientific exploration and research is becoming more and more serious. At the same time, people's activities in this kind of oil-contaminated water are increasing, so the research and development of materials with low adhesion, superoleophobicity and toughness underwater has attracted the attention of scientists. [0003] In recent years, based on the oleophobic properties of shark skin, shell nacre, seaweed and other biological structures, the layered micro / nano protrusion structure surface with high surface energy is considered to be the most outstanding underwater super oleophobic surface. As one of the surfaces, there ha...

Claims

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Application Information

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IPC IPC(8): C04B35/634C04B35/622
CPCC04B35/622C04B35/63448C04B35/6346C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/661C04B2235/77
Inventor 吕静李明管晴雯祁碧菽爱德华多·塞兹
Owner CHINA UNIV OF PETROLEUM (BEIJING)