Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

Cunha, Ana Gisela; Gandini, Alessandro

doi:10.1007/s10570-010-9435-5

Cited by 156 publications

(89 citation statements)

References 87 publications

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“…In general, starch is more soluble than cellulose. Commonly used solvents for chitin include LiCl (5%)/DMA, LiCl/N-methyl-2-pyrrolidone, CaCl 2 /MeOH and hexaluoroisopropyl alcohol [4][5][6].…”

Section: Solubility Of Polysaccharides 52mentioning

confidence: 99%

Polysaccharides in Solution: Experimental and Computational Studies

Jayawardena¹,

Pandithavidana²,

Sameera³

2017

Solubility of Polysaccharides

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Carbohydrates can be found in many natural sources, and they play a central role in various biological processes. These versatile biopolymers are diicult to dissolve in solutions, and therefore converting them into functional forms is a signiicant challenge, whereby both experimental and computational studies become critical. This chapter discusses commonly used experimental approaches to increase solubility of carbohydrates in solutions and computational studies to rationalize their conformations and solvation efects. Advances of experimental and computational methods for the study of carbohydrates will guide the design approaches to use carbohydrates in industrially and academically relevant applications.

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Section: Solubility Of Polysaccharides 52mentioning

confidence: 99%

Polysaccharides in Solution: Experimental and Computational Studies

Jayawardena¹,

Pandithavidana²,

Sameera³

2017

Solubility of Polysaccharides

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“…Os avanços recentes têm-se centrado na inclusão de compostos químicos nas embalagens que melhoram as propriedades dos filmes de CH [1][2][3][4][5] . Os óleos essenciais são incluídos nas matrizes poliméricas de CH para melhorar as suas propriedades antimicrobianas e antioxidantes [6,7] .…”

Section: Introductionunclassified

Efeito do armazenamento sobre a cor de filmes de quitosana

2016

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ResumoEste trabalho teve como objetivo determinar o efeito da inclusão de óleos essenciais (EOs) e do armazenamento na cor dos filmes de quitosana (CH) para os parâmetros de L*, a*, b* e ΔE. Os óleos essenciais de tomilho (TEO) e alecrim (REO) foram incluídos em concentrações de 0,5:1 e 1:1 p/p (EOs:CH), assim como suas combinações 50/50 (TEO:REO). Os filmes foram armazenados a temperaturas de 5 °C, 20 °C e, 33 °C e umidade relativa do ar de 60%, 75% e, 93% durante quatro semanas. Os parâmetros da cor foram determinados por refletância com componente especular incluído (RSIN) e por refletância com componente especular excluído (RSEX), usando seis padrões de fundos diferentes. A inclusão e o aumento da concentração de óleos essenciais, assim como o aumento do tempo, da temperatura e da umidade e o padrão de fundo alteraram os valores das variáveis resposta. Palavras-chave: aditivos alimentares, polímeros modificados, quitosana. AbstractThe aim of this study was to determine the effect of the thyme and rosemary essential oils (EOs) inclusion and the storage on the chitosan (CH) films color for the parameters L*, a*, b* and ΔE. The thyme (TEO) and rosemary (REO) essential oils were included in 0,5:1 and 1:1 p/p (EOs:CH), as well as their combination 50/50 (TEO:REO). The films were stored at temperatures of 5 °C, 20 °C and 33 °C and relative humidity of 60%, 75% and 93% during four weeks. The colour parameters were determined by reflectance with included specular component (RSIN) and reflectance with excluded specular component (RSEX) using six different standard backdrops. Most of the results provides that the standard backdrops, the inclusion and the increasing concentration of the essential oils, as well as the time, temperature and humidity influenced the response of the variables.

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“…Los recientes avances en envases y empaques se han enfocado en el estudio de la inclusión de diferentes compuestos químicos para mejorar las propiedades de las películas de CH [1][2][3][4]. Los aceites esenciales han sustituido a los antioxidantes sintéticos [5].…”

Section: Introductionunclassified

Efecto del almacenamiento sobre las propiedades físicas de las películas de quitosano con inclusión de aceites esenciales de tomillo y romero

2016

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RESUMENSe estudió el efecto de factores como humedad, temperatura y tiempo de almacenamiento sobre las propiedades físicas de las películas de quitosano con y sin inclusión de aceites. Se incluyeron aceites de tomillo (TEO) y de romero (REO) en proporciones de 0,5:1 y 1:1 v/p (EOs: CH), así como su combinación 50:50 (TEO:REO). Las películas formadas se almacenaron a temperaturas de 5, 20, 33°C y humedades relativas de 60 y 93% durante cuatro semanas. Las condiciones de almacenamiento alteraron las propiedades mecánicas y físicas de las películas, tales como humedad y capacidad de retención de agua debido a la hidrofícidad del polímero, al efecto plastificante de las moléculas de agua y a fenómenos de retrogradación influenciados por la temperatura y el tiempo de almacenamiento.Palabras clave: Quitosano, polímeros, películas modificadas, aditivos alimentarios. _______________________________________________________________________________________ ABSTRACTThe effect of factors of humidity, temperature and time on the physical properties of chitosan films with and without the thyme and rosemary essential oils inclusion was studied. The thyme (TEO) and rosemary (REO) essential oils were included in 0.5:1 and 1:1 v/w (EOs:CH), as well as their combination 50:50 (TEO:REO). The films were stored at temperatures of 5, 20, 33°C and relative humidities of 60 and 93% during four weeks. Storage conditions modify the physical properties of the films due to their hydrophilic behavior, the plasticizing effect of the water molecules and the retrogradation phenomena influenced by storage temperature and time.

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Turning polysaccharides into hydrophobic materials: a critical review. Part 2. Hemicelluloses, chitin/chitosan, starch, pectin and alginates

Cited by 156 publications

References 87 publications

Polysaccharides in Solution: Experimental and Computational Studies

Polysaccharides in Solution: Experimental and Computational Studies

Efeito do armazenamento sobre a cor de filmes de quitosana

Efecto del almacenamiento sobre las propiedades físicas de las películas de quitosano con inclusión de aceites esenciales de tomillo y romero

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