Preparation method of super-hydrophobic emulsion containing short fluorinated alkyl group

A technology of short fluorinated alkyl and fluorinated alkyl, which is applied in the field of superhydrophobic coating preparation, can solve the problems of threats to the environment of fluorine-containing reagents, and achieve excellent hydrophobicity

Active Publication Date: 2021-03-30
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the modified nanopowder has excellent hydrophobic and oleophobic properties, the fl

Method used

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  • Preparation method of super-hydrophobic emulsion containing short fluorinated alkyl group
  • Preparation method of super-hydrophobic emulsion containing short fluorinated alkyl group
  • Preparation method of super-hydrophobic emulsion containing short fluorinated alkyl group

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1. Preparation of functional monomer BRFAE-1:

[0044] Dissolve 4.9 g of 3-perfluoro-tert-butanol-1-propanol, 4.4 g of triethylamine (TEA) in 144 mL of CH 2 Cl 2 4.4 g of acryloyl chloride was added to react under nitrogen gas, react at room temperature for 14 h, and remove the solvent to obtain the product BRFAE-1.

[0045] 2. Miniemulsion polymerization

[0046] Add 12.4g of butyl acrylate, 12.4g of methyl methacrylate, 2.4g of the product BRFAE-1 prepared above, 1.4g of co-stabilizer n-hexadecane, and crosslinking agent ethylene glycol methacrylate in a beaker (AAEM) 1.4g, reactive emulsifier sodium acrylamido isopropyl sulfonate (A-2444) 1.4g, initiator azobisisobutyronitrile (AIBN) 4.1g and 164g water, under ice bath conditions, in Ultrasound in the ultrasonic cell pulverizer for 3s, intermittent 4s, lasted 14min. The obtained pre-emulsion was put into a four-neck flask, purged with nitrogen for half an hour, and reacted at 74° C. for 12 hours to obtain a copol...

Embodiment 2

[0050] 1. Preparation of functional monomer BRFAE-2:

[0051] Dissolve 31.4 g of 2-amino-1-perfluoro-tert-butanol ethane hydrochloride, 3.1 g of triethylamine (TEA) in 144 mL of CH 2 Cl 2 In the middle, blow nitrogen, add 1.4g acryloyl chloride, react at room temperature for 24h, remove the solvent to obtain the product BRFAE-2

[0052] 2. Miniemulsion polymerization

[0053] In a beaker, add 12.4g butyl acrylate, 12.4g methyl methacrylate, 2.4g of the above-mentioned prepared product BRFAE-2, co-stabilizer octadecyl methacrylate 1.4g, crosslinking agent diacetone acrylamide ( DAAM) 1.4g, reactive emulsifier (UCAN-1) 1.4g, initiator potassium persulfate (KPS) 4.1g and 164g water, under the condition of ice bath, ultrasonic in the ultrasonic cell pulverizer for 3s, intermittent 4s, continuous 14min. The obtained pre-emulsion was put into a four-neck flask, purged with nitrogen for half an hour, and reacted at 74° C. for 12 hours to obtain a copolymer emulsion.

[0054] 3. ...

Embodiment 3

[0057] 1. Preparation of functional monomer BRFAE-4:

[0058] 4.4g 2-allyloxymethyl-2-ethyl-1,3-propanediol, 13.4g diethyl azodicarboxylate (DEAD), 19.7g triphenylphosphine (Ph3P), 17.7g perfluoro tertiary Butanol was dissolved in 144mL tetrahydrofuran (THF), nitrogen was blown, and the reaction was carried out at 44°C for 22h to obtain the product BRFAE-4.

[0059] 2. Miniemulsion polymerization

[0060] Add 12.4g of isooctyl acrylate, 12.4g of methyl methacrylate, 2.4g of the product BRFAE-4 prepared above, 1.4g of co-stabilizer cetyl alcohol polystyrene, crosslinking agent ethylene glycol diacrylate in the beaker 1.4g, reactive emulsifier containing allyl special alcohol ether sulfate (NRS-14) 1.4g, initiator ammonium persulfate (APS) 4.1g and 164g water, under ice bath conditions, in ultrasonic cell pulverizer Moderate ultrasound 3s, intermittent 4s, lasted 14min. The obtained pre-emulsion was put into a four-neck flask, purged with nitrogen for half an hour, and reacte...

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Abstract

The invention discloses a preparation method of a super-hydrophobic emulsion containing a short fluorinated alkyl group, wherein the preparation method comprises the steps: by using water as a solvent, a functional monomer BRFAE containing a branched high-fluorocarbon alcohol group structure and an acrylic monomer, adding an initiator under the actions of an emulsifier, a crosslinking agent and aco-stabilizer, and carrying out miniemulsion polymerization at the temperature of 44444 DEG C to synthesize a monomer copolymer. A coating layer has a contact angle of more than 144 degrees and a rolling angle of less than 14 degrees on glass, wood, steel plates, plastics and other substrates, and has excellent hydrophobicity. The super-hydrophobic emulsion prepared by the method contains branched-chain high-fluorocarbon alcohol groups, has the advantage of easiness in degradation, is environment-friendly, and meets the requirements of green chemistry.

Description

technical field [0001] The invention belongs to the technical field of preparation of superhydrophobic coatings, and in particular relates to a method for preparing superhydrophobic coatings by short fluorinated alkyl superhydrophobic emulsion polymerization. Background technique [0002] Non-wetting coatings are currently a research hotspot in materials science due to their potential applications in self-cleaning, anti-icing, anti-fouling, anti-adhesion and corrosion-resistant surfaces. Much research has been devoted to the development of superhydrophobic or superoleophobic surfaces, or fully hydrophobic surfaces that are both water and oil repellent. Based on inspiration from nature, the best results can be obtained by combining micro- and nano-scale hierarchical structures with low surface energy materials (such as fluorinated polymers, silanes, thiols, surfactants, plasmonics, etc.). [0003] Super-hydrophobic coating is a new type of coating with special surface proper...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F220/24C08F220/58C08F220/36C08F216/14C08F220/04C09D133/12C09D133/08
CPCC08F220/1804C08F220/14C08F220/1808C09D133/16C09D133/24C09D133/12C09D133/08C09D133/02C08F220/24C08F220/585C08F220/36C08F216/1408C08F220/04
Inventor 戚栋明靳琳琳李家炜
Owner ZHEJIANG SCI-TECH UNIV
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