Ultrasound-assisted preparation of chitosan/nano-silica aerogel/tea polyphenol biodegradable films: Physical and functional properties

Zhijun Wu; Yang Li; Jing Tang; Derong Lin; Wen Qin; Douglas A Loy; Qing Zhang; Hong Chen; Suqing Li

doi:10.1016/j.ultsonch.2022.106052

Ultrasound-assisted preparation of chitosan/nano-silica aerogel/tea polyphenol biodegradable films: Physical and functional properties

Ultrason Sonochem. 2022 Jun:87:106052. doi: 10.1016/j.ultsonch.2022.106052. Epub 2022 May 31.

Authors

Zhijun Wu¹, Yang Li², Jing Tang², Derong Lin³, Wen Qin⁴, Douglas A Loy⁵, Qing Zhang², Hong Chen², Suqing Li²

Affiliations

¹ College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya'an 625014, China.
² College of Food Science, Sichuan Agricultural University, Ya'an 625014, China.
³ College of Food Science, Sichuan Agricultural University, Ya'an 625014, China. Electronic address: lindr2018@sicau.edu.cn.
⁴ College of Food Science, Sichuan Agricultural University, Ya'an 625014, China. Electronic address: qinwen@sicau.edu.cn.
⁵ Department of Chemistry & Biochemistry, University of Arizona, Tucson, AZ 85721, USA. Electronic address: daloy@arizona.edu.

Abstract

In this study, chitosan(CS), nano-silicon aerogels(nSA) and tea polyphenols(TP) were used as film-forming materials and processed with ultrasonication to form films using the tape-casting method. The effects of ultrasonication time, temperature and frequency on the properties of CS/nSA/TP film were explored via material property testing. The results of response surface showed that the maximum tensile strength of the film was 4.036 MPa at ultrasonication time(57.97 min), temperature(37.26 °C) and frequency(30 kHz). The maximum elongation at break of the film was 279.42 % at ultrasonication time(60.88 min), temperature(39.93 °C) and frequency(30 kHz). Due to cavitation and super-mixing effects, ultrasonication may make the surface of the film smoother and easier to degrade. After ultrasonication, TPs were protected by the 3D network structure composed of CS and nSA. Ultrasonication improved the antioxidant and antibacterial properties of the film. These results show that ultrasonication is an effective method to improve the properties of films.

Keywords: Antimicrobial property; Biodegradable film; Chitosan; Nano-silica aerogel; Ultrasound-assisted.

MeSH terms

Chitosan* / chemistry
Food Packaging / methods
Polyphenols / chemistry
Silicon Dioxide
Tea
Tensile Strength

Substances

Polyphenols
Tea
Silicon Dioxide
Chitosan