Native and Modified Gelatin Films Produced by Casting, Extrusion, and Blowing Extrusion Processes

Q2 Materials Science

Polymers from Renewable Resources Pub Date : 2017-02-01 DOI:10.1177/204124791700800102

C. Andreuccetti, T. Galicia-García, R. González‐Núñez, F. Martínez-Bustos, C. Grosso

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引用次数: 9

Abstract

Samples of native gelatin and gelatin modified by acylation and esterification were processed by casting and thermoplastic extrusion to produce laminated and tubular films. Extruded films containing sorbitol showed homogeneity and flexibility. Thinner films were obtained with the addition of sorbitol to the formulation. Tubular films prepared from gelatin modified with stearic acid were easily processed, had reduced friction, and were able to withstand bubble formation without fracturing after preparation. Films prepared by casting or thermoplastic techniques showed a decrease in tensile strength with the addition of plasticizer, and this also resulted in a substantial increase in their elongation ratio. The stearic acid modified gelatin-based films processed by blown extrusion showed higher tensile strength. Films fabricated by casting were, in general, less soluble than those prepared by extrusion except the films modified with stearic acid with or without the addition of plasticizer.

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由铸造、挤出和吹挤出工艺生产的原生和改性明胶薄膜

通过浇铸和热塑性挤出对天然明胶和经酰化和酯化改性的明胶样品进行处理，制备层压和管状薄膜。含有山梨醇的挤出薄膜显示出均匀性和柔韧性。在配方中加入山梨醇可获得更薄的薄膜。由硬脂酸改性的明胶制备的管状薄膜易于加工，摩擦降低，并且在制备后能够承受气泡的形成而不会破裂。通过浇铸或热塑性技术制备的薄膜显示出随着增塑剂的添加而拉伸强度降低，并且这也导致它们的伸长率显著增加。通过吹塑挤出处理的硬脂酸改性明胶基薄膜显示出较高的拉伸强度。通过流延制备的薄膜通常比通过挤出制备的膜溶解性低，除了用硬脂酸改性的薄膜（添加或不添加增塑剂）。

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.