4.6 Article

Colloidal Aqueous Dispersions of Methyl (meth)Acrylate-Grafted Polyvinyl Alcohol Designed for Thin Film Applications

期刊

COATINGS
卷 12, 期 12, 页码 -

出版社

MDPI
DOI: 10.3390/coatings12121882

关键词

polymer colloids; polymer thin films; optical constants; optical sensing

资金

  1. CoE National center of mechatronics and clean technologies
  2. European Regional Development Fund [BG05M2OP001-1.001-0008-C01]
  3. Bulgarian National Science Fund
  4. [KII-06-H47/1/26.11.2020]

向作者/读者索取更多资源

In this study, aqueous copolymer dispersions of methyl (meth)acrylate-grafted poly(vinyl alcohol) were synthesized and researched for their potential in thin film deposition. The copolymer structures were varied by adjusting the monomer-to-PVA ratio and initiator concentration during redox polymerization. The films deposited on silicon substrates were characterized optically and their suitability for optical sensing of acetone vapors was confirmed through reflectance measurements.
In this paper, the aqueous copolymer dispersions of methyl (meth)acrylate-grafted poly(vinyl alcohol) are in situ synthesized and studied as a promising platform for the deposition of thin films with advanced applications. A series of dispersions of the varied copolymer structure and composition are obtained at mild reaction conditions by carrying out a redox polymerization at a different monomer-to-PVA ratio and initiator concentration. The obtained colloidal particles are characterized by Fourier transformed infrared spectroscopy, nuclear magnetic resonance, dynamic light scattering, and transmission electron microscopy. The copolymer dispersions are further used for deposition of thin films on silicon substrates. The films are characterized optically through reflectance measurements and non-linear curve fitting. Their suitability for the optical sensing of acetone vapors is confirmed by reflectance measurements before and during their exposure to analyte vapors. The cross sensitivity, sensing repeatability, and recovery of the sensitive films are discussed.

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