Evaluation of bioactive low‐density polyethylene (LDPE) nanocomposite films in combined treatment with irradiation on strawberry shelf‐life extension

Begum, Tofa; Follett, Peter A.; Shankar, Shiv; Moskovchenko, Lana; Salmieri, Stéphane; Lacroix, Monique

doi:10.1111/1750-3841.16551

Cited by 1 publication

(1 citation statement)

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“…In some cases, introducing fillers into the polymer matrix also has economic reasons [ 6 ]. A variety of products are used to produce polymer composites, including biopolymers, such as lignin [ 1 , 7 , 8 , 9 , 10 , 11 , 12 ] and cellulose [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ]; inorganic substances, e.g., titanium dioxide [ 20 , 21 , 22 , 23 ]; and hybrid materials, e.g., MgO/lignin [ 24 ] or TiO 2 /lignin [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of TiO2–Lignin Hybrid Fillers in Low-Density Polyethylene Composites on Photocatalytic Performance and UV-Barrier Properties

Jędrzejczak,

Cegłowski,

Bula

et al. 2024

Polymers

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The main objective of this study was to discover new packaging materials that could integrate one of the most expected properties, such as UV protection, with a self-cleaning ability defined as photocatalytic performance. Accordingly, new hybrid additives were used to transform LDPE films into materials with complex performance properties. In this study, titanium dioxide–lignin (TL) hybrid systems with a weight ratio of inorganic to organic precursors of 5-1, 1-1, and 1-5 were prepared using a mechanical method. The obtained materials and pristine components were characterized using measurement techniques and research methods, such as Fourier-transform infrared spectroscopy (FTIR), thermal stability analysis (TGA/DTG), measurement of the electrokinetic potential as a function of pH, scanning electron microscopy (SEM), and particle size distribution measurement. It was found that hydrogen bonds were formed between the organic and inorganic components, based on which the obtained systems were classified as class I hybrid materials. In the next step, inorganic–organic hybrid systems and pristine components were used as fillers for a low-density polyethylene (LDPE) composite, 5 and 10% by weight, in order to determine their impact on parameters such as tensile elongation at break. Polymer composites containing titanium dioxide in their matrix were then subjected to a test of photocatalytic properties, based on which it was found that all materials with TiO2 in their structure exhibit photocatalytic properties, whereby the best results were obtained for samples containing the TiO2–lignin hybrid system (1-1). The mechanical tests showed that the thin sheet films had a strong anisotropy due to chill-roll extrusion, ranging from 1.98 to 3.32. UV–Vis spectroscopy revealed four times higher light absorption for composites in which lignin was present than for pure LDPE, in the 250–450 nm range. On the other hand, the temperature at 5% and 30% weight loss revealed by TGA testing increased the highest performance for LDPE/TiO2 materials (by 20.4 °C and 8.7 °C, respectively).

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