Gas barrier and optical properties of cellulose nanofiber coatings with dispersed TiO 2 nanoparticles

Roilo, David; Maestri, Cecilia Ada; Scarpa, Marina; Bettotti, Paolo; Checchetto, R.

doi:10.1016/j.surfcoat.2017.10.015

Cited by 31 publications

(21 citation statements)

References 33 publications

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“…The reason why WVP appears to drop significantly after adding nanoparticles could be primarily attributed to the highly complex path that was generated because of the distribution of impermeable TiO 2 nanoparticles throughout the matrix. Generally, the nanoparticles increase the pass length of water molecules by compelling the permeating molecules to randomly oscillate around them [33]. As previously mentioned, the number of available OH groups reduced because of the production of hydrogen bonds between Ti-O and the hydroxyl groups of PLA; this consequently reduced the WVP of the films.…”

Section: Water Vapor Permeabilitymentioning

confidence: 96%

Physico-Mechanical and Antibacterial Properties of PLA/TiO2 Composite Materials Synthesized via Electrospinning and Solution Casting Processes

Zhang

Ahmed

et al. 2019

Coatings

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In this study, PLA/TiO2 composites materials were prepared via electrospinning and solution casting processes. By testing the mechanical properties, water contact angle, water vapor permeability, and solubility of the composite nanofibers and films, the comprehensive performances of the two types of nanocomposites were analyzed. The results show that maximum tensile strengths of 2.71 ± 0.11 MPa and 14.49 ± 0.13 MPa were achieved for the nanofibers and films at a TiO2 content of 0.75 wt.%. Moreover, the addition of TiO2 significantly cut down the water vapor transmittance rate of the nanofibers and films while significantly improving the water solubility. Further, the antibacterial activity increased under UV-A irradiation for a TiO2 nanoparticle content of 0.75 wt.%, and the nanofiber and films exhibited inhibition zones of 4.86 ± 0.50 and 3.69 ± 0.40 mm for E. coli, and 5.98 ± 0.77 and 4.63 ± 0.45 mm for S. aureus, respectively. Overall, the performance of the nanofiber was better than that of the film. Nevertheless, both the nanocomposite membranes satisfied the requirements of food packaging materials.

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Section: Water Vapor Permeabilitymentioning

confidence: 96%

Physico-Mechanical and Antibacterial Properties of PLA/TiO2 Composite Materials Synthesized via Electrospinning and Solution Casting Processes

Zhang

Ahmed

et al. 2019

Coatings

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“…Nano-cellulose (also called cellulose nano-fibrils, CNF) is a highly stable elongated nanostructure with diameter of few nm and length in the 100 nm range showing high optical transparency and excellent mechanical properties [48]. Their use as filler to improve the gas barrier properties of the PLA matrix has been recently proposed in studies revealing that dense CNF films formed by self-assembled CNF exhibit high optical transparency and gas-impermeable properties [49,50]. In this research, PLA composites containing functionalized CNF were produced by solvent mixing in chloroform at various filler content ranging from 1 to 20 wt%.…”

mentioning

confidence: 99%

Polylactic acid-lauryl functionalized nanocellulose nanocomposites: Microstructural, thermo-mechanical and gas transport properties

Rigotti¹,

Checchetto²,

Tarter³

et al. 2019

Express Polym. Lett.

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According to the European Bioplastics association, in 2017, the so-called bioplastics represented only 2.06 million tons of the 320 million tons of plastics produced annually [1]. The global production capacity is expected to increase up to 2.62 million tons in 2023. This growth is pushed by the demand of more sophisticated biopolymers, new applications and products. From packaging, agriculture, consumer electronics, textile to automotive, bioplastics are used in an increasing number of applications. In fact, biopolymers offer a number of additional advantages if compared to conventional plastics, such as a reduced carbon footprint and additional waste management options. Among bio-based and biodegradable plastics, polylactic acid (PLA) is one of the most interesting ones due to their good mechanical properties, good workability, excellent barrier properties. Therefore, it is a good candidate for the replacement of polystyrene (PS), polypropylene (PP), and acrylonitrile butadiene styrene (ABS) in many applications. However, PLA presents some weak points mainly represented by its low ductility, poor toughness, low glass transition temperature, high sensitivity to moisture and relatively low gas barrier, that limit its use in packaging applications [2, 3]. Indeed, the main

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“…They found that the antimicrobial activity of the films was attributed to the biocidal action of TiO 2 -NPs against bacteria [ 91 ]. Roilo et al prepared bilayer membranes for food packaging applications by depositing TiO 2 -NPs on PLA substrates, cellulose nanofibers and nanocomposite coatings, and found that the addition of TiO 2 -NPs reduced the penetrant diffusivity but did not affect gas barrier performances, as well as slightly decreased the optical transparency [ 92 ]. Oleyaei et al developed TiO 2 -NPs (0.5, 1 and 2 wt%) incorporated into potato starch films [ 93 ].…”

Section: Inorganic and Metal Oxide Nanomaterials Applied In Food Pmentioning

confidence: 99%

Recent Developments in Food Packaging Based on Nanomaterials

et al. 2018

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The increasing demand for high food quality and safety, and concerns of environment sustainable development have been encouraging researchers in the food industry to exploit the robust and green biodegradable nanocomposites, which provide new opportunities and challenges for the development of nanomaterials in the food industry. This review paper aims at summarizing the recent three years of research findings on the new development of nanomaterials for food packaging. Two categories of nanomaterials (i.e., inorganic and organic) are included. The synthetic methods, physical and chemical properties, biological activity, and applications in food systems and safety assessments of each nanomaterial are presented. This review also highlights the possible mechanisms of antimicrobial activity against bacteria of certain active nanomaterials and their health concerns. It concludes with an outlook of the nanomaterials functionalized in food packaging.

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Gas barrier and optical properties of cellulose nanofiber coatings with dispersed TiO 2 nanoparticles

Cited by 31 publications

References 33 publications

Physico-Mechanical and Antibacterial Properties of PLA/TiO2 Composite Materials Synthesized via Electrospinning and Solution Casting Processes

Physico-Mechanical and Antibacterial Properties of PLA/TiO2 Composite Materials Synthesized via Electrospinning and Solution Casting Processes

Polylactic acid-lauryl functionalized nanocellulose nanocomposites: Microstructural, thermo-mechanical and gas transport properties

Recent Developments in Food Packaging Based on Nanomaterials

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