Preparation and Characterization of Phosphorylated Starch Blends With Chitosan and Polyvinyl Alcohol

Silva, Paloma L. da; Gomes, Anida Maria Moraes; Ricardo, Nágila Maria Pontes Silva; Machado, T. F.

doi:10.5935/0100-4042.20160043

Cited by 5 publications

(5 citation statements)

References 23 publications

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“…Neste estudo, o nível de intensidade da cor amarela se mostrou mais evidente nas formulações com mais de 50% de quitosana. (Lima et al, 2017;Silva et al, 2016).…”

Section: Resultsunclassified

Resíduo agroindustrial de soro de leite como solvente ecologicamente correto na elaboração de filme hidrocoloidal biopoliméricos: estudo das propriedades ópticas

Rodrigues

Miranda

Neto

et al. 2022

RSD

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O desenvolvimento de embalagens ecofriendly, utilizando fontes renováveis com ciclo de vida curto, como o amido e a quitosana, ganham destaque em pesquisas como inovação tecnológica. No mesmo sentido, o soro de leite líquido (resíduo de agroindústria láctea) como comportamento de solvente (agente dispersante) na obtenção de filmes flexíveis. O presente trabalho objetivou desenvolver filmes da blenda de amido com diferentes concentrações de quitosana, solubilizado em soro de leite líquido pelo método casting descontínuo. Os filmes foram caracterizados quanto às propriedades ópticas (colorimetria, opacidade e transparência) e barreira à radiação ultravioleta (UV). Todos os filmes das blendas apresentaram diferença total de coloração (ΔE) visível em todos os tratamentos, ΔE >12. Assim como, boa propriedade de barreira à radiação de luz UV. O tratamento com 25% (m/m) de quitosana apresentou maior barreira à luz UV (200 a 315 nm), região de maior suscetibilidade a reações de oxidação lipídica em alimentos. Logo, o soro de leite apresentou uma ação dispersante de solvente na formação dos filmes biopoliméricos. Assim, os filmes hidrocoloidais demonstraram forte potencial tecnológico para uso e aplicação como embalagens ecofriendly para fins de aplicação em produtos lácteos ricos em compostos foto-oxidativos.

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“…Neste estudo, o nível de intensidade da cor amarela se mostrou mais evidente nas formulações com mais de 50% de quitosana. (Lima et al, 2017;Silva et al, 2016).…”

Section: Resultsunclassified

Resíduo agroindustrial de soro de leite como solvente ecologicamente correto na elaboração de filme hidrocoloidal biopoliméricos: estudo das propriedades ópticas

Rodrigues

Miranda

Neto

et al. 2022

RSD

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“…The solubility (S) of the films was evaluated according to the method by Silva et al (2016), with modifications. The films were cut in sizes of 2 cm², and their residual moisture was removed in a greenhouse at 50 °C.…”

Section: Solubility Assessmentmentioning

confidence: 99%

Polyethylene oxide biofilms incorporated into Plantago major extract as dressings for dermal lesion

Jacques,

Andrighetti,

Schmitt

et al. 2023

Braz. J. Hea. Rev.

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Introduction: polyethylene oxide is a polymeric material with extensive biomedical applications, making it a great candidate in the production of wound dressings due to its hydrophilic and non-occlusive characteristic. Plantago major is a plant used in traditional medicine for centuries due to its healing and antioxidant activity. Objective: the development of a polyethylene oxide biofilms incorporating Plantago major extract, which aims to combine the healing and antioxidant properties of this plant with the physical and mechanical characteristics of the polymer, so that it can be used as wound dressings. Methodology: the crude extract of Plantago major was obtained by maceration with methanol; phytochemical screening was then performed to identify secondary metabolites. The antioxidant activity of the extract was evaluated in films containing only the polymer matrix and in films containing the extract. The films produced by the casting method were also evaluated for their morphology, water vapor transmission, swelling index, rate of degradation, and solubility. Results: the presence of tannins, steroids, and terpenes was identified in the extract. The developed films showed high solubility, water vapor transmission, and rate of degradation. The films containing Plantago major extract obtained a significant antioxidant activity. Conclusion: the films presented adequate characteristics to be used as wound dressings and, their high solubility, leads to the formation of a hydrogel when exposed to excess moisture, which allows it to be used for a range of lesions. Additionally, the incorporation of the extract provided antioxidant activity to the films, increasing their healing potential.

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“…Solubility was evaluated in distilled water by adapting the method by Silva et al (2016). The films were cut into 2 cm samples and left in an oven at 50 °C for residual moisture evaporation.…”

Section: Solubilitymentioning

confidence: 99%

Polymeric pullulan films incorporated with extract of Cyclospermum leptophyllum (pers.) Sprague for healing purposes

Andrighetti

Jacques²,

Schmitt³

et al. 2022

RSD

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Healing films provide excellent results in the adjuvant treatment of injuries. Its association with plant extracts allows the achievement of therapeutic activities, favoring skin regeneration. This study aimed to develop pullulan films incorporated with an extract from the aerial parts of Cyclospermum leptophyllum to be used as healing dressings and to evaluate their morphological and physicochemical characteristics and their potential antioxidant activity. Polymeric films in the proportion of 4% PU (m/v) and 15% plant extract and control films composed only of the polymer matrix were produced using the casting method. The films were evaluated for thickness, visual aspects, solubility, water vapor permeability, swelling, degradation, and antioxidant activity. They showed good appearance and flexibility but heterogeneity due to the precipitation of components. A high degree of solubility and swelling was observed, and despite its rapid dissolution in contact with water, the formation of a hydrogel can enable greater adherence to wounds. The films have controlled water vapor transmission, that allows gas exchange. A DPPH radical inhibition rate of 17.23% was obtained, proving its antioxidant activity. Therefore, the biofilms produced have healing potential, which can be better studied in the future through tests demonstrating antimicrobial, and anti-inflammatory activities.

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Preparation and Characterization of Phosphorylated Starch Blends With Chitosan and Polyvinyl Alcohol

Cited by 5 publications

References 23 publications

Resíduo agroindustrial de soro de leite como solvente ecologicamente correto na elaboração de filme hidrocoloidal biopoliméricos: estudo das propriedades ópticas

Resíduo agroindustrial de soro de leite como solvente ecologicamente correto na elaboração de filme hidrocoloidal biopoliméricos: estudo das propriedades ópticas

Polyethylene oxide biofilms incorporated into Plantago major extract as dressings for dermal lesion

Polymeric pullulan films incorporated with extract of Cyclospermum leptophyllum (pers.) Sprague for healing purposes

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