Effects of preparation conditions on the properties of agar/maltodextrin-beeswax pseudo-bilayer films

Rui Zhang; Wentao Wang; Hui Zhang; Yangyong Dai; Haizhou Dong; Lingrang Kong; Hanxue Hou

doi:10.1016/j.carbpol.2020.116029

Effects of preparation conditions on the properties of agar/maltodextrin-beeswax pseudo-bilayer films

Carbohydr Polym. 2020 May 15:236:116029. doi: 10.1016/j.carbpol.2020.116029. Epub 2020 Feb 17.

Authors

Rui Zhang¹, Wentao Wang², Hui Zhang¹, Yangyong Dai¹, Haizhou Dong¹, Lingrang Kong³, Hanxue Hou⁴

Affiliations

¹ College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, PR China.
² College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, PR China; State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, PR China.
³ College of Agronomy, Shandong Agricultural University, Tai'an City, Shandong Province, 271018, PR China. Electronic address: lkong@sdau.edu.cn.
⁴ College of Food Science and Engineering, Shandong Agricultural University, Engineering and Technology Center for Grain Processing of Shandong Province, Tai'an, PR China. Electronic address: hhx@sdau.edu.cn.

PMID: 32172845
DOI: 10.1016/j.carbpol.2020.116029

Abstract

The present study aims to develop an agar/maltodextrin-beeswax (A/M-BW) pseudo-bilayer film with high surface hydrophobicity by adjusting drying temperatures and homogenization conditions. Attenuated total reflectance-Fourier transform infrared determined the chemical components of the upper and lower surfaces of the films. X-ray diffraction characterized the crystalline behavior of film matrix. Scanning electron microscopy explored the distribution patterns of BW and phase separation phenomenon. Atomic force microscopy revealed the surface roughness of film. The pseudo-bilayer film prepared at 8000 rpm for 1 min (A/M-BW-8000-1) had the highest tensile strength (20.57 MPa), Young's modulus (640.60 MPa), contact angle (92.9°), and the lowest water vapor permeability (2.18 × 10^-12 g m^-1 s^-1 Pa^-1). The A/M-BW pseudo-bilayer film with excellent surface hydrophobicity and mechanical properties was obtained at higher drying temperature and lower homogenization intensity. The A/M-BW pseudo-bilayer film has promising potential for application in food packaging which requires higher water vapor resistance.

Keywords: Agar; Beeswax; Drying temperature; Homogenization; Maltodextrin; Pseudo-bilayer films.