Edible coating based on beeswax-in-water Pickering emulsion stabilized by cellulose nanofibrils and carboxymethyl chitosan

Bing Xie; Xingzhong Zhang; Xiaogang Luo; Yixiang Wang; Yan Li; Bin Li; Shilin Liu

doi:10.1016/j.foodchem.2020.127108

Edible coating based on beeswax-in-water Pickering emulsion stabilized by cellulose nanofibrils and carboxymethyl chitosan

Food Chem. 2020 Nov 30:331:127108. doi: 10.1016/j.foodchem.2020.127108. Epub 2020 Jun 11.

Authors

Bing Xie¹, Xingzhong Zhang², Xiaogang Luo³, Yixiang Wang⁴, Yan Li⁵, Bin Li⁶, Shilin Liu⁷

Affiliations

¹ College of Food Science & Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China. Electronic address: 593121320@qq.com.
² College of Food Science & Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China. Electronic address: 1456704963@qq.com.
³ School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan, Hubei 430073, China; School of Materials and Engineering, Zhengzhou University, No. 100. Science Avenue, Zhengzhou City, Henan 450001, China. Electronic address: xgluo0310@hotmail.com.
⁴ Department of Food Science and Agricultural Chemistry, McGill University, Ste Anne de Bellevue, Quebec H9X 3V9, Canada. Electronic address: yixiang.wang@mcgill.ca.
⁵ College of Food Science & Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China. Electronic address: yanli@mail.hzau.edu.cn.
⁶ College of Food Science & Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China. Electronic address: libinfood@mail.hzau.edu.cn.
⁷ College of Food Science & Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China; National R&D Center for Citrus Preservation, Huazhong Agricultural University, Wuhan, Hubei 430070, China; School of Materials and Engineering, Zhengzhou University, No. 100. Science Avenue, Zhengzhou City, Henan 450001, China. Electronic address: slliu2013@mail.hzau.edu.cn.

PMID: 32593036
DOI: 10.1016/j.foodchem.2020.127108

Abstract

In this work, novel edible coating films based on beeswax-in-water (O/W) Pickering emulsions had been investigated. The Pickering emulsions were stabilized with cellulose nanofibrils (CNFs)/carboxymethyl chitosan (CCS). The emulsions with a droplet diameter of around 10 μm had uniform particle size distribution, and the creaming stability was improved with the increasing the contents of CNFs in the complexes, rheological analysis demonstrated that the Pickering emulsions had an elastic gel-like network. Furthermore, free-standing films were obtained when the emulsions were dried at ambient condition, the tensile strength of the coating films could be 5.0 MPa at a strain of 2.2%, and the water vapor permeability (WVP) value was lower than 2 × 10^-7 g∙h^-1∙m^-1∙Pa^-1. Moreover, the coating films could inhibit the growth of typical spoilage organisms such as S. aureus or E. coli, it indicated that the coatings films would have promising applications in antiseptic and fresh keeping for berry fruits.

Keywords: Beeswax; Carboxymethyl chitosan; Cellulose nanofibrils; Coating; Pickering emulsion.

MeSH terms

Anti-Bacterial Agents / chemistry*
Cellulose / chemistry*
Chitosan / analogs & derivatives
Chitosan / chemistry
Emulsions / chemistry*
Escherichia coli
Food Microbiology
Food Packaging / instrumentation*
Nanostructures / chemistry
Permeability
Staphylococcus aureus
Steam
Tensile Strength
Water
Waxes / chemistry*

Substances

Anti-Bacterial Agents
Emulsions
Steam
Waxes
carboxymethyl-chitosan
Water
beeswax
Cellulose
Chitosan