Work

Cellulose–pectin composite hydrogels fabricated via LiBr solution: A sustainable approach to freeze–thaw and solvent regenerated networks with enhanced structure–function relationships

Year: 2026

Type: article

Abstract: • Cellulose–pectin composite hydrogels were prepared using an eco-friendly LiBr system. • Increasing pectin disrupted cellulose regeneration, crystallinity, strength, and WRV. • Freeze–thaw/solvent regeneration restored network integrity by H-bond reorganization. • This study offers a sustainable framework to tune structure–function relationships. Cellulose–pectin composite hydrogels have been synthesized using LiBr solution to investigate the influence of pectin on cellulose network formation and to explore their potential applications in biomaterials. The hydrogels were synthesized via a dissolution-regeneration process, employing various concentrations of cellulose and pectin. FT-IR and XPS confirmed partial demethylation of pectin and reduced hydrogen bonding interactions, while XRD revealed a progressive decrease in crystallinity with increasing pectin content. Mechanical strength tests and WRV measurements demonstrated that excess pectin disrupts cellulose regeneration, resulting in a looser and weaker network. In contrast, freeze–thaw and organic solvent regeneration treatments significantly improved structural stability, restoring hardness and water retention through hydrogen-bond reorganization and network densification. Furthermore, pectinase activity confirmed that the reducing activity of pectin was retained after processing, supporting its role as a functional component of the hydrogel matrix. The antioxidant capacity, measured using the FRAP assay, demonstrated enhanced performance in pectin-containing hydrogels. These findings highlight the potential of LiBr-based cellulose–pectin composite hydrogels, developed through a sustainable approach, in mechanical reinforcement and material applications.

Source: Composites Part A Applied Science and Manufacturing

DOI: 10.1016/j.compositesa.2026.109650

Authors: Sohyun Yoon, Dohak Baek, Sohee Lim, Dae-Young Kim

Institution: Dongguk University

Language: English

Topic: Advanced Cellulose Research Studies

Subfield: Biomaterials

Field: Materials Science

Domain: Physical Sciences

SDGs: Responsible consumption and production, Industry, innovation and infrastructure

Open Access status: hybrid

Estimated APC paid: $4,480