4.7 Article

Physicochemical characterization of collagen fibers and collagen powder for self-composite film production

期刊

FOOD HYDROCOLLOIDS
卷 23, 期 7, 页码 1886-1894

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.foodhyd.2009.01.013

关键词

Edible film; Protein; Solubility; Sorption isotherms; Particle size; Differential scanning calorimetry

资金

  1. FAPESP [06/56015-2]
  2. CNPq

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The purpose of this work was to determine some physicochemical characteristics of collagen fibers and collagen powder obtained from bovine hides as potential raw materials for production of films with improved mechanical properties. These materials are collagen in its crude form, without the hydrolysis reaction that leads to gelatin production. The following analyses were carried out: proximate composition, amino acid composition, solubility in water, differential scanning calorimetry (DSC). Fourier transform infrared spectroscopy (FTIR), size distribution and moisture sorption isotherms. The collagen fibers and collagen powder showed practically the same protein content, and the only differences between them, apart from the particle shape and size, were in their solubility in water, which was probably partly due to differences in particle size. Due to their similar composition but different physical properties, collagen fibers and collagen powder were shown to be suitable for the production of biocomposite films where the powder is the basis of the film matrix and the fibers act as filler, exerting a reinforcement effect. Films with the protein content supplied by 50% collagen powder and 50% collagen fibers could be produced with the film thickness fixed at 180 pm and subjective evaluations suggested that the fibers remained completely involved in the filmogenic matrix. (C) 2009 Elsevier Ltd. All rights reserved.

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