α-Cellulose-based films: effect of sodium lignosulfonate (SLS) incorporation on physicochemical and antibacterial performance

Xinyu Lu,Xiaoli Gu,Yu Qin,Haoquan Guo,Chaozhong Xu,Chenrong Ding,Han Que,Hossain Mahmud Robin,Xu Liu

doi:10.1007/s10570-021-03949-w

Abstract

A homogeneous α-cellulose film was prepared by a regeneration method from ZnCl2/CaCl2/cellulose mixed system and was further combined with sodium lignosulfonate (SLS) via crosslinking through intermolecular hydrogen bonds and “bridge linkages”. The physicochemical and antibacterial performance of prepared films were investigated and results showed that the modified film exhibited stronger tensile strength, higher thermal stability, lower hydrophilic effect, better UV shielding as compared with the original one, and especially, better antibacterial ability derived from the presence of phenolic hydroxyl and sulfonate groups in SLS. This study proposed a simple and sustainable method for fabricating a multifunctional and environmentally friendly composite film using two main lignocellulose resources as raw materials.

Highlights

Cellulose, as one of the three main ingredients in lignocellulosic biomass, is a famous biopolymer and has great potential for preparing film-based materials (Khalili et al, 2018; Koli et al, 2018; Zhang et al, 2017)
Other bands for CF mainly appear at 1310, 1102, 102, and 895 cm− 1, which are related to the stretching of glucopyranose ring in cellulose (Hu & Wang, 2016)
The peak at 1456 cm− 1 is due to the presence of C-N originating from triethanolamine, while peaks at ⁓ 1725 and ⁓ 1570 cm− 1 are characteristic of C = O stretching vibration and carboxylate groups derived from succinic anhydride (Cao et al, 2011; Liu et al, 2009; Sehaqui et al, 2017)

Summary

Introduction

As one of the three main ingredients in lignocellulosic biomass, is a famous biopolymer and has great potential for preparing film-based materials (Khalili et al, 2018; Koli et al, 2018; Zhang et al, 2017). The properties of bio-compatibility, flexibility, chemical modification, and universal applicability make cellulose-based films promising to be utilized in fields of wastewater treating, wound healing, packaging, and bacteriostasis (Hu & Wang, 2016; Kong et al, 2014; Lv et al, 2018; Puspasari et al, 2018; Wang et al, 2019; Wen et al, 2019). The regenerated cellulose film derived from regenerated method is a promising alternative to polymeric one (Puspasari et al, 2018). Chemical modification or blended with other polymers is effective pathway for addressing this issue through introducing different functional groups and modifying the inherent structure

Methods

Results

Conclusion