Physical Properties of Composite Films from Tilapia Skin Collagen with Pachyrhizus Starch and Rambutan Peel Phenolics.

Yongliang Zhuang,Yun Sun,Shiyan Ruan,Hanghang Yao

doi:10.3390/md17120662

Yongliang Zhuang, Yun Sun + Show 2 more

Open Access

https://doi.org/10.3390/md17120662

Copy DOI

Journal: Marine Drugs	Publication Date: Nov 25, 2019
Citations: 21	License type: CC BY 4.0

Affiliation: Kunming University of Science and Technology

Abstract

Different composite films composed of tilapia skin collagen (TSC) with Pachyrhizus starch (PS) or rambutan peel phenolics (RPP) were prepared, and the physical properties of these films were determined. The effects of PS and RPP on TSC films were investigated, and our results indicated that PS and RPP could improve the physical properties of TSC films. Opacity and film thickness showed an enhanced trend with increasing PS and RPP contents in TSC films, whereas solubility in water, elongation-at-break (EAB), and water vapor permeability (WVP) showed declining trends. TSC film with 10% PS and 0.5% RPP had the highest tensile strength, and the tensile strength dropped drastically when the content of PS and RPP increased. The light transmittances of the films could decrease with the incorporation of PS and RPP. Differential scanning calorimetry (DSC) demonstrated that the addition of PS and RPP improved the thermal stability of TSC films. In addition, X-ray diffraction indicated that the crystallinity of the films decreased and the amorphous structure of the films tended to become more complex with the addition of PS and RPP. As shown by fourier transform infrared spectroscopy (FTIR) analysis, PS and RPP can strongly interact with TSC, resulting in a modification of its structure. Scanning electron microscope (SEM) analysis showed that there was a good compatibility between TSC, PS, and RPP. The results indicated that TSC film incorporated with 10% PS and 0.5% RPP was an effective method for improve the physical properties of the film. TSC–PS–RPP composite films can be used not only in biomedical applications, but also as active food packaging materials.

Highlights

In recent years, the application of renewable, degradable natural materials on films has attracted increasing attention [1]
The tensile strength of tilapia skin collagen (TSC) film increased from 45.33 MPa to 50.97 MPa with the addition of 10%
Differential scanning calorimetry (DSC) demonstrated that the addition of 10% of Pachyrhizus starch (PS) and 0.5% of rambutan peel phenolics (RPP) could improve the thermal stability of TSC film

Summary

Introduction

The application of renewable, degradable natural materials on films has attracted increasing attention [1]. Polysaccharides, proteins, and lipids are usually used as matrixes to prepare films. Protein is the best choice because of its good film formation, gas barrier, and mechanical properties compared with others [2]. Collagen, which is the major structural protein in connective tissues, is widely used to prepare these films. Collagen film, which is widely used in various fields such as medical, pharmaceutical, and cosmetics industries, and is used for food packaging, was successfully commercialized in 1980s [3]. Collagen can be used as a good matrix for film preparation due to its excellent properties, including non-toxicity, biocompatibility, low antigenicity and allergenicity, and biodegradability [4,5]. The low viscoelasticity and strong hydrophilicity of collagen film limit its application in some fields. Collagen film needs to be modified to improve its functional properties

Objectives

Results

Conclusion