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
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
Citations
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Starch Fatty Esters for Potential Use in Petroleum Industry
Fernanda Trindade Gonzalez Dias,Roberta de Souza,Elizabete F. Lucas,Poland Quimica Ltda, Rio de Janeiro, Brazil +3 more
TL;DR: In this paper, the authors obtain and characterize starch fatty esters with variations in the hydrophilic/lipophilic balance and assess whether these samples have potential application in oil-based drilling fluids.
Journal ArticleDOI
Development of Starch Biofilms Using Different Carboxylic Acids as Plasticizers
Luana Conceição da Cruz,Cleidiene Souza de Miranda,Wilton Jesus dos Santos,Ana Paula Bispo Gonçalves,Jamerson Carneiro de Oliveira,Nadia Mamede José +5 more
TL;DR: In this paper, starch films were synthesized with different carboxylic acids as plasticizers, aiming to observe the effect of the acids' chain size in the final films properties.
Journal ArticleDOI
How the compatibility between polyethylene and thermoplastic starch can be improved by adding organic acids
TL;DR: In this article, the effect of three different organic acids (3%phr): citric, capric, and palmitic on LLDPE/TPS blends, with a mass ratio of 70/30, was investigated.
Journal ArticleDOI
Formation and properties of aqueous compatible colloidal blends between pre-gelatinized maize starch and zein
TL;DR: The Institute for Food, Nutrition and Well-being (IFNuW) of the University of Pretoria and the South African National Research Foundation (SARNF) as mentioned in this paper.
Journal ArticleDOI
Structure, physical properties, hemocompatibility and cytocompatibility of starch/zein composites
Xing Liu,Yi Xie,Wei Li,Wen Sheng,Yinping Li,Zan Tong,Hong Ni,Céline Huselstein,Xiong Wang,Yun Chen +9 more
TL;DR: The hemocompatibility and cytocompatible evaluation showed that SZ composites are anticoagulant materials with no hemolysis and low cytotoxicity and maybe have potentials for applications as biomaterials.
References
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