A Novel Hydrophilic, Antibacterial Chitosan-Based Coating Prepared by Ultrasonic Atomization Assisted LbL Assembly Technique

Xiaoyu Wang; Yuyang Zhou; Melissa Johnson; Cameron Milne; Sigen A; Yening Li; Wenxin Wang; Nan Zhang; Qian Xu

doi:10.3390/jfb14010043

A Novel Hydrophilic, Antibacterial Chitosan-Based Coating Prepared by Ultrasonic Atomization Assisted LbL Assembly Technique

J Funct Biomater. 2023 Jan 12;14(1):43. doi: 10.3390/jfb14010043.

Authors

Xiaoyu Wang¹, Yuyang Zhou^{2

3}, Melissa Johnson¹, Cameron Milne¹, Sigen A¹, Yening Li², Wenxin Wang¹, Nan Zhang², Qian Xu¹

Affiliations

¹ Charles Institute of Dermatology, School of Medicine, University College Dublin, D04 V1W8 Dublin, Ireland.
² Centre of Micro/Nano Manufacturing Technology (MNMT-Dublin), School of Mechanical and Materials Engineering, University College Dublin, D04 KW52 Dublin, Ireland.
³ National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou 215123, China.

Abstract

To explore the potential applicability of chitosan (CTS), we prepared aldehyde chitosan (CTS-CHO) with chitosan and sodium periodate via oxidation reaction and then a chitosan-based hydrophilic and antibacterial coating on the surface of poly (lactic acid) (PLA) film was developed and characterized. The oxidation degree was determined by Elemental analyser to be 12.53%, and a Fourier transform infrared spectroscopy was used to characterize the structure of CTS-CHO. It was evident that CTS-CHO is a biocompatible coating biomaterial with more than 80% cell viability obtained through the Live/Dead staining assay and the alamarBlue assay. The hydrophilic and antibacterial CTS-CHO coating on the PLA surface was prepared by ultrasonic atomization assisted LbL assembly technique due to Schiff's base reaction within and between layers. The CTS-CHO coating had better hydrophilicity and transparency, a more definite industrialization potential, and higher antibacterial activity at experimental concentrations than the CTS coating. All of the results demonstrated that the ultrasonic atomization-assisted LbL assembly CTS-CHO coating is a promising alternative for improving hydrophilicity and antibacterial activity on the PLA surface. The functional groups of CTS-CHO could react with active components with amino groups via dynamic Schiff's base reaction and provide the opportunity to create a drug releasing surface for biomedical applications.

Keywords: PLA; antibacterial; chitosan; coating; hydrophilic.

Grants and funding

This research was funded by the Science Foundation Ireland (SFI) (Funding Agency Ref No: 19/FFP/6522), and the China Scholarship Council (CSC202009110089).