Comparison of different coating techniques on the properties of FucoPol films

Ana R.V. Ferreira, Janne Haapanen, Jyrki M. Mäkelä, Jon E. Bratvold, Ola Nilsen, Mikko Tuominen, Vítor D. Alves, Isabel M. Coelhoso

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Plasma deposition, liquid flame spray (LFS) and atomic layer deposition (ALD) were used to form inorganic coatings in new exopolysaccharide (FucoPol) biodegradable films. Coated films were characterised in terms of surface, optical and barrier properties in order to evaluate their potential use in food packaging. FucoPol films presented dense and homogeneous surface with instant water contact angle of 95̊. Plasma deposition of perfluorohexane (PFH) on FucoPol surface has not shown significant improvement in the hydrophobic behaviour over the time. The FucoPol coating of SiO2 nanoparticles deposited by LFS and plasma deposition of PFH have shown higher instant water contact angle (135°) caused by coating surface roughness, but this hydrophobic behaviour was not stable over time. FucoPol films coated only with TiO2 deposited by ALD and combination of that with plasma deposition of PFH have shown stable water contact angle during time (90̊ and 115̊, respectively), transparency in the same order of magnitude and significantly lower permeability to water vapour (3.45 × 10−11 mol/m s Pa and 3.45 × 10−11 mol/m s Pa when compared to uncoated films with 5.32 × 10−11 mol/m s Pa). Moreover, films coated with TiO2-PFH have also shown a permeability to oxygen of 1.70 × 10−16 molm/m2s Pa which is 67% lower than uncoated films.

Original languageEnglish
Pages (from-to)268-274
Number of pages7
JournalInternational Journal of Biological Macromolecules
Volume103
DOIs
Publication statusPublished - 1 Oct 2017

Keywords

  • ALD/Plasma/LFS coatings
  • Barrier properties
  • FucoPol films

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