Annatto-colored Poly(3-hydroxybutyrate): A Comprehensive Study on Photodegradation

Pagnan, Caroline Salvan; Mottin, Artur Caron; Oréfice, Rodrigo Lambert; Ayres, Eliane; Câmara, Jairo José Drummond

doi:10.1007/s10924-017-1026-1

Cited by 14 publications

(18 citation statements)

References 42 publications

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“…Few studies concerning the use of carotenoids in polymeric packaging materials are found in literature. Their application have distinct approaches: β‐carotene and lycopene have been used as thermal and photo‐oxidative stabilizants of polymers; astaxanthin has been used with the target of producing antioxidant active packaging to food; and bixin has been used to obtain colored films . In general, results show that despite presenting low stability to oxygen, ultraviolet radiation and sunlight, carotenoids produced films with enhanced thermo‐oxidative stability.…”

Section: Introductionmentioning

confidence: 99%

Carotenoids extracts as natural colorants in poly(lactic acid) films

Stoll

Rech

Flôres

et al. 2018

J of Applied Polymer Sci

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The use of vivid packaging colors is a strategy to attract consumers' attention and interest. In this context, the awareness of harmful effects caused by the use of synthetic colorants has led to an increasing interest in naturally derived alternatives. The use of carotenoids as colorants for polymeric materials represents an environmentally friendly way of obtaining colored packaging. The incorporation of carotenoids extracts rich in bixin, lycopene, and β‐carotene into poly(lactic acid) films was evaluated, where the presence of carotenoids (100 μg/g) reduced oxygen permeability and presented a lubricant effect, increasing films elasticity up to 50%. No effect on films crystallinity was observed. Carotenoids reduced films transparency and bixin was the most stable carotenoid at dark and light conditions. The color stability of films, evaluated through kinetic parameters of color degradation, presented Chroma half‐life times (40 °C/light) of 111, 51, and 5 days for bixin, lycopene, and β‐carotene, respectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46585.

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Section: Introductionmentioning

confidence: 99%

Carotenoids extracts as natural colorants in poly(lactic acid) films

Stoll

Rech

Flôres

et al. 2018

J of Applied Polymer Sci

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“…The addition of annatto colorant improved the photodegradation of films under UVA exposure with a good thermal stability. On the other hand, it was acted as a hiding agent confirmed by SEM micrographs (Pagnan et al., 2018). In another study, Stoll, Rech, Flôres, Nachtigall, and de Oliveira Rios (2018) used carotenoids as colorants for polymeric materials (PVAs) to represent an environmentally friendly method for obtaining colored packaging.…”

Section: Smart Packaging Based On Natural Food Colorants For Monitorimentioning

confidence: 96%

“…- (Pagnan, Mottin, Oréfice, Ayres, & Câmara, 2018) LDPE/ HDPE -The addition of a HDPE layer by coextrusion delayed the release of carotenoids.…”

Section: Ftirmentioning

confidence: 99%

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Smart monitoring of gas/temperature changes within food packaging based on natural colorants

Mohammadian

Sani

Jafari

2020

Comp Rev Food Sci Food Safe

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The development of smart packaging and innovation in common food packaging technology will greatly help to meet market needs, including consumer preference for "safe" foods, high-quality products and mitigate the negative environmental impacts of food packaging. In addition, consumers' tendency to use natural ingredients such as pigments and biopolymers has provided the basis for their application in the food industry, including smart food packaging. Hence, smart packaging in addition to protecting food products against environmental damage can also reveal a sign (colorimetric, chemical, electric, etc.) in real time in response to any changes in the packaging conditions and food quality. This comprehensive review emphasizes on the gas/temperature-sensitive smart films based on natural colorants and their key applications in the food packaging systems. Technological considerations associated with the natural colorantresponsive films, smart packaging, biopolymers, and importance of natural colorants versus synthetic dyes are investigated. In practice, the most common designed colorimetric indicators for monitoring gas and temperature changes and application of relevant smart films in real food models have also been discussed. Gas and time-temperature indicators provide a rapid, reliable, and online assessment and a visual indication of the food product quality level, usually through a color change, which is directly related to gas and temperature conditions during distribution and storage of relevant food products. However, future studies need to consider main points such as cost, consumers' acceptance, and confidence, regulatory aspects (i.e., labeling) and multifunctionality of smart packaging to be commercially sustainable.

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“…When sensitive thermoplastic polymers, such as polypropylene, polyethylene, and poly (methyl methacrylate) and aramid fibers, absorb UV radiation, chains degradation, and loss of strength occur at the critical points of the chain structure. Some researchers have evaluated the change in the chemical and mechanical properties of the polymers by UV degradation [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The effects of UV degradation on the physical, thermal, and morphological properties of industrial nylon 66 conveyor belt fabrics

Moezzi

Yekrang

Ghane

et al. 2019

Journal of Industrial Textiles

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In this study, nylon 66 industrial fabrics (used in the conveyor belts) were exposed artificially to the accelerated ultraviolet rays and the degradation mechanism was evaluated using spectral, thermal, and morphological analyses. The fabric samples were exposed to six different exposure times in a UV chamber and tensile tests were carried out in the main and bias (45°) directions. The results showed that the shear modulus was reduced in the early stages covering 4 h of the UV radiation because of the linkages breakage and the increase in the amorphous regions. However, after this early stage, the shear modulus started to increase. The Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) analysis, and X-ray photoelectron spectroscopy (XPS) study were also performed to evaluate the surface morphology and the degradation mechanism of the nylon 66 fibers after UV illumination. The results also revealed that the formation of new links by free radicals caused the change in the bond wavelengths. Furthermore, it was found that there was an interesting mechanism for the UV degradation of nylon 66 fabrics at different exposure times, as confirmed by the results obtained regarding the mechanical properties of the samples. The results of this study can be, therefore, helpful for the industrial application of nylon 66 woven conveyor belts exposed to solar UV radiation.

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Annatto-colored Poly(3-hydroxybutyrate): A Comprehensive Study on Photodegradation

Cited by 14 publications

References 42 publications

Carotenoids extracts as natural colorants in poly(lactic acid) films

Carotenoids extracts as natural colorants in poly(lactic acid) films

Smart monitoring of gas/temperature changes within food packaging based on natural colorants

The effects of UV degradation on the physical, thermal, and morphological properties of industrial nylon 66 conveyor belt fabrics

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