A preparation method of a hydrophobic film with a slidable liquid locked on its surface

A technology of hydrophobic film and hydrophobic film, which is applied in the field of preparation of hydrophobic film, can solve the problems of easily damaged micro-nano porous structure, easy freezing and damaged hydrophobicity, etc. The effect of promoting and increasing the injection rate

Active Publication Date: 2021-06-22
CHANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the porous membrane prepared by the fluorine-containing block polymer by the water vapor condensation and volatilization method has a certain degree of hydrophobicity due to the relatively regular micro-nano porous structure, the membrane has certain defects, that is, it is exposed to water for a long time. In the air, this kind of micro-nanoporous structure is easy to be destroyed, and it is very easy to freeze and be destroyed in a super-cooled environment, so that the hydrophobicity is greatly reduced. At present, it is urgent to find a hydrophobic surface that is not easy to be damaged, which is resistant to ice and cold. The shortcomings of traditional hydrophobic surfaces have made substantial contributions to its further application in practical production

Method used

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  • A preparation method of a hydrophobic film with a slidable liquid locked on its surface
  • A preparation method of a hydrophobic film with a slidable liquid locked on its surface
  • A preparation method of a hydrophobic film with a slidable liquid locked on its surface

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Embodiment 1

[0046] (1) Preparation of macroinitiator PDFHMA-Br by atom transfer radical polymerization

[0047] Weigh 0.1406g of 2,2'-bipyridine and 0.0297g of CuCl into the gram flask, then pat the wall of the bottle under vacuum and nitrogen to make the solid complex, then inject 5mL DMF, (vacuum nitrogen, gently Tap the bottle wall) repeatedly for three times, use a micro-sampler to measure 43.3 μl of ethyl 2-bromoisobutyrate and add it to the gram bottle, use a syringe to measure 3.8 mL of the reaction monomer dodecafluoroheptyl methacrylate and add The gram flask was evacuated three times with nitrogen gas, and reacted at 100°C for 24 hours, then cooled with liquid nitrogen for 30 seconds, added tetrahydrofuran to the reaction system for ultrasonic dissolution, rinsed with a perbasic alumina column, and washed with methanol The mixed solution with water is the precipitated product of the precipitant, which is suction filtered and dried to obtain the macromolecular initiator PDFHMA-Br...

Embodiment 2

[0057] (1) the method that ATRP method prepares macromolecular initiator is with embodiment 1;

[0058] (2) The method for preparing the amphiphilic block copolymer polydodecafluoroheptyl methacrylate-b-polyhydroxyethyl methacrylate (PDFHMA-b-PHEMA) is the same as in Example 1;

[0059] (3) the method for preparing superhydrophobic porous film is the same as embodiment 1;

[0060] (4) Infuse silicone oil to prepare a hydrophobic film that locks oil on the surface

[0061] The hydrophobic porous film obtained in step (3) was immersed in silicone oil at room temperature for 3 days so that the silicone oil was fully infused into the pores, and then vacuum-dried in a normal temperature drying oven for 1 day. After complete infusion, the samples were then placed vertically in a laboratory environment for approximately 6 hours to drain excess fluid. In order to avoid the presence of un-locked silicone oil on the surface, cover the surface with thin filter paper and press gently to...

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Abstract

The invention discloses a method for preparing a hydrophobic film with a slidable liquid locked on its surface. Firstly, an amphiphilic fluorine-containing block hydrophobic base material (PDFHMA‑b‑PHEMA) is synthesized by an ATRP method. Then, a porous film with regular micro-nano structure is prepared from the base material by a water vapor condensation and volatilization method. Finally, hydrophobic silicone oil is infused into the pores on the surface of the film to form a hydrophobic surface with sliding liquid locked on the surface. Next, its performance was explored, and the results showed that this layer of sliding liquid locked on the surface can endow the base material with good cold resistance. The invention successfully prepares a hydrophobic film with slidable liquid locked on the surface, and the film has good anti-icing and freezing resistance.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and in particular relates to a preparation method of a hydrophobic film with a slidable liquid locked on its surface. Background technique [0002] Due to the presence of fluorine element, fluorine-containing polymers mostly have low surface tension and exhibit excellent chemical resistance, hydrophobicity and oleophobicity, and chemical stability. These excellent properties make it more and more widely studied in the fields of hydrophobicity, coating, surface modification and so on. [0003] However, fluorine-containing materials have two shortcomings that limit their further development. The first point is that the raw materials of this type of material are relatively expensive; in solvent. In order to improve the above two shortcomings, this paper chooses to copolymerize fluorine-containing acrylate and non-fluorine acrylate (hydroxyethyl methacrylate) to obtain an amphiphilic flu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/00C08J5/18C08F293/00C08L53/00
CPCC08F293/00C08F2438/01C08J5/18C08J7/00C08J2353/00C08J2483/04
Inventor 张洪文刘俊朱子健丁颜岳希斌林加晖姜彦蒋姗丁永红俞强
Owner CHANGZHOU UNIV
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