The Microstructure and Properties of Starch-Polyvinyl Alcohol-Alginate Films With Copaiba and Lemongrass Oils

Brandelero, Renata Paula Herrera; Almeida, Fabio Mendonça de; Alfaro, Alexandre da Trindade

doi:10.5935/0100-4042.20150098

Cited by 6 publications

(10 citation statements)

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“…It seems that the PVA chains presented lower mobility and higher inter / intra-connections in PVA-D-O samples. This is an indication that Duotrill  and copaiba oil combined increased the structural stability of the PVA gels [12] . Table 3 shows the results obtained by inhibition of S. aureus.…”

Section: In Vitro Analysismentioning

confidence: 91%

“…In addition, bioactive oils are also able of delay the microbial activity, due to phenolic and terpenoids groups to which is attributed their antimicrobial activities [11] . Brandelero et al [12] added copaiba and lemongrass oils directly to starch-polyvinyl alcohol-alginate device, which presented improved antimicrobial properties [12,13] . Kavoosi et al [14] developed gelatin/PVA hydrogel loaded with Zataria essential oil (ZO) for wound-dressing, obtaining increased the antimicrobial activities due to the addition of ZO, which also decrease the films' swelling ability.…”

Section: Introductionmentioning

confidence: 99%

“…Kavoosi et al [14] developed gelatin/PVA hydrogel loaded with Zataria essential oil (ZO) for wound-dressing, obtaining increased the antimicrobial activities due to the addition of ZO, which also decrease the films' swelling ability. ZO probably contributed to the gels hydrophobicity due to its characteristics [12,14] . The essential oils have a nature hydrophobic due to substances that stimulate create region non-polar in the polymeric matrix.…”

Section: Introductionmentioning

confidence: 99%

“…The essential oils have a nature hydrophobic due to substances that stimulate create region non-polar in the polymeric matrix. This efficiency is linked with rate of proportion between hydrophilic and hydrophobic of film, and with characteristics of the compounds added such as polarity or structural chemical [12,15] .…”

Section: Introductionmentioning

confidence: 99%

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In vitro evaluation of PVA gels loaded with Copaiba Oil and Duotrill®

et al. 2019

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Enrofloxacin can be slowly delivered through polymeric systems and the addition of oil could increase the polymeric gels hydrophobicity and help the continuous release. The present work intended to develop and characterize microstructurally (XRD and FTIR) and in vitro (swelling and antimicrobial tests) the PVA hydrogels loaded with copaiba oil and Duotrill (enrofloxacin) to treat bacterial infections, as pyelonephritis, in the veterinary field. Duotrill  and oil combined diminished the gels degree of crystallinity and it was observed interaction between phases due to a new band found only in PVA hydrogels loaded with copaiba oil and Duotrill (PVA-DO) FTIR spectrum. The samples with oil swelled less than samples without it, where copaiba oil altered the samples' hydrophilicity. PVA-DO presented lower weight loss and higher gel fraction than PVA, indicating the loaded material increased the gels stability. All samples containing oil and Duotrill  inhibited S. aureus.

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Section: In Vitro Analysismentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

In vitro evaluation of PVA gels loaded with Copaiba Oil and Duotrill®

et al. 2019

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“…Brandelero et al [17] studied the incorporation of copaiba essential oil into films made of cassava starch, polyvinyl alcohol and sodium alginate, plasticized with glycerol, and reported that the films showed antifungal activity against Fusarium sp. The same effect was reported by Morelli et al [18], who coated bio-based materials (paper and poly lactic acid) with copaiba oil and detected antimicrobial activity against Bacillus subtilis.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity and GC-MS Profile of Copaiba Oil for Incorporation into Xanthosoma mafaffa Schott Starch-Based Films

et al. 2020

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The present study evaluated the effect of the incorporation of copaiba oil, in direct and in microencapsulated form, into films based on Xanthosoma mafaffa Schott starch. Initially, the characterization of copaiba oil by gas chromatograph coupled with mass spectrometry (GC-MS) and its antimicrobial activity against gram-positive and gram-negative bacteria was performed. The films were produced by the casting technique and characterized in relation to physical, chemical, structural, and antimicrobial activity. Sesquiterpenes, mainly β-caryophyllene, were the predominant compounds in copaiba oil, showing antimicrobial activity against B. subtilis and S. aureus. The films showed forming capacity, however, was observed a decrease in solubility and revealed an increase in hydrophobic characteristics. However, the oil reduced the tensile strength and elongation, while the microcapsules did not influence the mechanical properties in comparison to the control film. From microstructure analysis, changes in the films roughness and surface were observed after the addition of oil both directly and in microencapsulated form. Films incorporated with microparticles were able to inhibit the gram-positive bacteria tested, forming inhibition zones, indicating that the encapsulation of copaiba oil was more efficient for protecting bioactive compounds from the oil, suggesting the possible application of mangarito starch-based films incorporated with copaiba oil as biodegradable packaging.

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