Digitální knihovnaUPCE
 

Effect of Fluorinated Comonomer, Polymerizable Emulsifier, and Crosslinking on Water Resistance of Latex Coatings

ČlánekOtevřený přístuppeer-reviewedpublished
Náhled

Datum publikování

2022

Autoři

Machotová, Jana
Knotek, Petr
Černošková, Eva
Svoboda, Roman
Zarybnicka, Lucie
Kohl, Miroslav
Kalendová, Andréa

Vedoucí práce

Oponent

Název časopisu

Název svazku

Vydavatel

MDPI

Abstrakt

Common latex coatings suffer from poor water resistance, which often limits their practical application. This paper reports on the preparation of polyacrylate latexes using various approaches to tune the water resistance, wettability, and surface properties of their coating films. The mutual effects of fluorinated monomer copolymerization, emulsifier type (polymerizable and general), and intra- or interparticle covalent crosslinking (due to allyl methacrylate copolymerization and a keto-hydrazide reaction, respectively) were studied. The polyacrylate latexes were synthesized through a two-step semicontinuous emulsion polymerization of 2,2,2-trifluoroethyl methacrylate, butyl acrylate, methyl methacrylate, and methacrylic acid as the basic monomers. The fluorinated monomer was incorporated into the second-step polymer (at a content of 30 wt.% based on the second-step monomer feeds). The water resistance, wettability, and surface properties of the coating films were evaluated with focus on the water absorption, water whitening, water contact angle, and surface topography using atomic force microscopy. It was found that highly water-resistant and hydrophobic coatings that possessed a self-healing ability were prepared, provided that the polymerizable emulsifier and the fluorinated monomer were involved in the latex synthesis, along with the intra- and interparticle covalent crosslinking.

Rozsah stran

p. 1150

ISSN

2079-6412

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Projekt

Zdrojový dokument

Coatings, volume 12, issue: 8

Vydavatelská verze

https://www.mdpi.com/2079-6412/12/8/1150

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open access

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Klíčová slova

polyacrylate latex, polymerizable emulsifier, crosslinking, keto-hydrazide reaction, water resistance, hydrophobicity, self-healing, akrylátový latex, síťování, keto-hydrazidová reakce, polymerizovatelný emulgátor, voděodolnost, hydrofobnost, self-healing

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Except where otherwised noted, this item's license is described as open access