Preparation and characterization of thermoplastic starch/zein blends
Elisângela Corradini,Antonio J. F. Carvalho,Antônio Aprígio da Silva Curvelo,José Augusto Marcondes Agnelli,Luiz H. C. Mattoso +4 more
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TLDR
The use of zein in thermoplastic starch compositions causes a decrease in the water sensitivity of these materials and lower its melt viscosity during processing making zein a suitable and very promising component in TPS compositions as mentioned in this paper.Abstract:
Blends of starch and zein plasticized with glycerol were prepared by melting processing in an intensive batch mixer connected to a torque rheometer at 160 °C. The resulting mixtures were compression molded and then characterized by scanning electron microscopy, differential scanning calorimetry, wide-angle X ray diffraction and water-absorption experiments. The blends were immiscible, showing two distinct phases of starch and zein. The water uptake at equilibrium and its diffusion coefficient were determined. The water uptake at equilibrium decreased with increasing zein content. The diffusion coefficient fell sharply on addition of 20% zein and remained constant as zein content was increased. No appreciable effect of zein on starch crystallization was observed by X ray diffraction. The use of zein in thermoplastic starch compositions causes a decrease in the water sensitivity of these materials and lower its melt viscosity during processing making zein a suitable and very promising component in TPS compositions.read more
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Book ChapterDOI
Pharmaceutical Applications of Natural Polymers
TL;DR: This chapter covers the pharmaceutical application of natural polymers derived from carbohydrate and protein sources in modified and unmodified forms for pharmaceutical applications such as production of transdermal, percutaneous, oral and topical drug delivery systems.
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Starch-based biocomposite membrane reinforced by orange bagasse cellulose nanofibers extracted from ionic liquid treatment
Diego Menezes,Fernando Mendonça Diz,Luiz Fernando Romanholo Ferreira,Yendry Corrales,José Roberto Vega Baudrit,Luiz Pereira da Costa,Maria Lucila Hernández-Macedo +6 more
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TL;DR: The aim of this work was to explore the effect of zeolite ZSM-5 (ZSM5) incorporation sequence on the phase morphology, microstructure, and performance of polyethylene/thermoplastic starch (PE/TPS) films.
References
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