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Self-assembled super-hydrophobic film based on concentration regulation as well as preparation method and application of self-assembled super-hydrophobic film

A concentration-adjusting, super-hydrophobic technology, applied in textiles and papermaking, coating, fiber treatment, etc., can solve the problems of high energy input, limited separation performance, etc., and achieve the effect of low surface energy, simple operation and good hydrophobic performance

Pending Publication Date: 2022-04-01
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods either require high energy input or exhibit limited separation performance

Method used

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  • Self-assembled super-hydrophobic film based on concentration regulation as well as preparation method and application of self-assembled super-hydrophobic film
  • Self-assembled super-hydrophobic film based on concentration regulation as well as preparation method and application of self-assembled super-hydrophobic film
  • Self-assembled super-hydrophobic film based on concentration regulation as well as preparation method and application of self-assembled super-hydrophobic film

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preparation example Construction

[0045] The preparation method of the superhydrophobic film based on concentration-regulated self-assembly of the present invention comprises the following steps:

[0046] (1) Synthesis of polymer

[0047] The 2-3um silane micron balls and modified monomers are subjected to radical polymerization reaction in a solvent, and the product is precipitated, filtered and dried to obtain irregularly shaped polymer powder. Modified monomers are styrene, partially esterified β-cyclodextrin derivatives and butyl methacrylate, in which butyl methacrylate can make the polymer adhere to the substrate, and the rigidity of styrene is to support the burr structure Crucially, the cavity structure of synergistic cyclodextrin is more conducive to promoting the formation of superhydrophobicity.

[0048] (2) Preparation of superhydrophobic film

[0049] Fully disperse the polymer powder prepared in step (1) in N,N-dimethylformamide to form a 20-30 mg / mL casting solution, and then cast it on the su...

Embodiment 1

[0053] (1) Preparation of partially esterified β-cyclodextrin derivatives by esterification reaction

[0054] Add 5g of β-cyclodextrin and 8.8g of maleic anhydride in the mortar, mix and grind them, put them into powder and place them in a conical flask with a rotor, seal them with plastic wrap and tinfoil, and put them in an 80°C Keep the temperature in an oil bath for 8 h. After stirring and reacting for 480 min, fully wash and grind three times with butanone and absolute ethanol respectively, filter with suction, and dry to obtain a partially esterified β-cyclodextrin derivative.

[0055] figure 1 It is the infrared spectrum curve of β-cyclodextrin monomer and partially esterified β-cyclodextrin derivatives. It can be seen from the two curves that at 3450cm -1 The stretching vibration peak of the hydroxyl group appears in the vicinity, and the 580cm of the β-cyclodextrin structure -1 ring vibration at 945cm -1 The skeleton vibration containing α-1,4 glycosidic bonds at ...

Embodiment 2

[0070] (1) Esterification reaction to modify the β-cyclodextrin monomer to prepare partially esterified cyclodextrin derivatives, the method is the same as in Example 1;

[0071] (2) The preparation of trapezoidal polyvinyltrimethoxysilane microspheres is also prepared by the sol-gel method, specifically the same as in Example 1;

[0072] (3) Synthesis of copolymer

[0073]Take 2.6g mL of partially esterified cyclodextrin obtained in step (1), 12mL of styrene, 1.8mL of butyl methacrylate, 1.8g of trapezoidal polyvinyltrimethoxysilane microspheres obtained in step (2), 185 mg of azobisisobutyronitrile initiator was dissolved in 15.0mL of N,N-dimethylformamide, added to a three-necked flask under deoxygenated conditions, nitrogen gas was blown for 10 minutes to completely deoxygenate, and finally it was placed in a stirring In a functional oil bath, set the rotation speed at 400r / min, the oil temperature at 65°C, and condense and reflux for 6 to 8 hours, wash and precipitate th...

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Abstract

The invention belongs to the field of polymer functional materials, and particularly relates to a self-assembled super-hydrophobic film based on concentration regulation as well as a preparation method and application of the self-assembled super-hydrophobic film based on concentration regulation. The preparation method comprises the following steps: carrying out free radical polymerization on beta-cyclodextrin partially esterified by maleic anhydride, a styrene monomer and trapezoidal polyvinyl siloxane micron particles in the presence of azodiisobutyronitrile to obtain a polymer product, preparing a 20-30mg / mL injection molding liquid by taking N, N-dimethylformamide as a solvent, casting the injection molding liquid onto the surface of a base material, and carrying out vacuum drying to obtain a finished product. The hydrophobic membrane with the micro-nano particles similar to the sea urchin structure is obtained through self-assembly and has efficient oil-water separation capacity, for example, the average separation rate of cyclohexane and water can reach 98.2%. When the super-hydrophobic polymer film is cast to a glass substrate, the contact angle of the super-hydrophobic film reaches more than 154 degrees, the rolling angle of the super-hydrophobic film is lower than 2 degrees, and the super-hydrophobic polymer film is an excellent super-hydrophobic polymer film.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and in particular relates to a superhydrophobic film based on concentration-regulated self-assembly and its preparation method and application. Background technique [0002] In recent years, the preparation of artificial superhydrophobic films with water contact angles greater than 150° and sliding angles less than 5° has attracted extensive attention due to their wide applications in industrial and household applications. The designs are inspired by the water-repelling and self-cleaning properties of naturally occurring surfaces such as lotus leaves, butterfly wings and red rose petals. At present, there are many methods for preparing superhydrophobic films, such as electrochemical deposition, solution immersion, chemical etching, plasma etching, electrospinning, layer-by-layer self-assembly, sol-gel method, etc. However, the treatment of the waste liquid in the electrochemical depos...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F283/12C08F212/08C08F220/18D06M15/21D06M15/03D06M15/643D06M15/233D06M15/263C09D151/02C09D151/08
Inventor 张洪文胡建顾钦天杨丽吕程程买重阳姜彦
Owner CHANGZHOU UNIV
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