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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Atomic Layer Deposited TiO2 and Al2O3 Thin Films as Coatings for Aluminum Food Packaging Application

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Author(s):
Dias, Vanessa [1, 2] ; Maciel, Homero [3, 2] ; Fraga, Mariana [4] ; Lobo, Anderson O. [5] ; Pessoa, Rodrigo [3, 2] ; Marciano, Fernanda R. [3, 1]
Total Authors: 6
Affiliation:
[1] Univ Vale Paraiba Univap, Lab Nanotecnol Biomed, BR-12244000 Sao Jose Dos Campos, SP - Brazil
[2] Ctr Ciencia & Tecnol Plasmas & Mat PlasMat, ITA, BR-12228900 Sao Jose Dos Campos, SP - Brazil
[3] Univ Brasil, Inst Cient & Tecnol, BR-08230030 Sao Paulo, SP - Brazil
[4] Univ Fed Sao Paulo Unifesp, Inst Cient & Tecnol, BR-12231280 Sao Jose Dos Campos, SP - Brazil
[5] Univ Fed Piaui UFPI, LIMAV Lab Interdisciplinar Mat Avancados, BR-64049550 Teresina, PI - Brazil
Total Affiliations: 5
Document type: Journal article
Source: MATERIALS; v. 12, n. 4 FEB 2 2019.
Web of Science Citations: 1
Abstract

Titanium dioxide (TiO2) and aluminum oxide (Al2O3) coatings have been investigated in a wide range of bio-applications due to their biodegradation and biocompatibility properties, that are key parameters for their use in the food packaging and biomedical devices fields. The present study evaluates and compares the electrochemical behavior of the non-coated, commercial resin-coated, TiO2-coated and Al2O3-coated aluminum in commercial beer electrolyte. For this, TiO2 and Al2O3 thin films were deposited on aluminum (Al) substrates using atomic layer deposition (ALD). The evaluation of the corrosion barrier layer properties was performed by linear sweep voltammetry (LSV) during 10 min and electrochemical impedance spectroscopy (EIS). In addition, profilometry, grazing incidence X-ray diffractometry (GIXRD), scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FT-IR) analyses were performed to investigate the physical and chemical properties of the pristine and / or corroded samples. TiO2 and Al2O3 films presented an amorphous structure, a morphology that follows Al substrate surface, and a thickness of around 100 nm. Analysis of LSV data showed that ALD coatings promoted a considerable increase in corrosion barrier efficiency being 86.3% for TiO2-coated Al and 80% for Al2O3-coated Al in comparison with 7.1% of commercial resin-coated Al. This is mainly due to the lower electrochemical porosity, 11.4% for TiO2-coated Al and 20.4% for Al2O3-coated Al in comparison with 96% of the resin-coated Al, i.e. an increase of up to twofold in the protection of Al when coated with TiO2 compared to Al2O3. The EIS results allow us to complement the discussions about the reduced corrosion barrier efficiency of the Al2O3 film for beer electrolyte once SEM and FT-IR analyzes did not show drastic changes in both investigated ALD films after the corrosion assays. The above results indicate that ALD TiO2 and Al2O3 films may be a viable alternative to replace the synthetic resin coatings frequently used in aluminum cans of use in the food industry. (AU)

FAPESP's process: 15/10876-6 - Plasma-fungal biofilm interaction: diagnostic of the plasma and inactivation process of the Candida spp strains
Grantee:Anelise Cristina Osorio Cesar Doria
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 18/01265-1 - Synthesis and microbiological analysis of polymer substrates coated with TiO2 and / or Al2O3 ultra-thin films by atomic layer deposition technology
Grantee:Rodrigo Savio Pessoa
Support type: Regular Research Grants
FAPESP's process: 11/17877-7 - Development of new polymeric scaffolds by electrospinning technique with incorporation of vertically aligned carbon nanotubes and nanohidroxyapatite for bone tissue regeneration
Grantee:Anderson de Oliveira Lobo
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 14/18139-8 - Growth and doping studies of mono-crystalline CVD-diamond, dye-colored via discharge of high-power mW 2.45 GHz
Grantee:Mariana Amorim Fraga
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 15/09697-0 - Electrospinning of novel functional nanobiomaterials based on peptides and bottlebrush polymers for tissue engineering
Grantee:Anderson de Oliveira Lobo
Support type: Scholarships abroad - Research
FAPESP's process: 11/20345-7 - Study of nanoparticle-incorporated diamond-like carbon films for biomedical applications
Grantee:Fernanda Roberta Marciano
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 16/00575-1 - Functional biomembranes based on peptides and bottlebrush polymers to tissue engineering
Grantee:Fernanda Roberta Marciano
Support type: Scholarships abroad - Research
FAPESP's process: 12/15857-1 - Scientific studies and innovation application on CVD diamond, DLC and carbon nanostructures obtained by chemical vapor deposition technique
Grantee:Vladimir Jesus Trava-Airoldi
Support type: Research Projects - Thematic Grants
FAPESP's process: 11/50773-0 - Center of excellence in physics and applications of plasmas
Grantee:Ricardo Magnus Osório Galvão
Support type: Research Projects - Thematic Grants
FAPESP's process: 15/05956-0 - 15th International Conference on Atomic Layer Deposition
Grantee:Rodrigo Savio Pessoa
Support type: Research Grants - Meeting - Abroad