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Bioactive Fiber Foam Films from Cellulose and Willow Bark Extract with Improved Water Tolerance

Overview
Journal ACS Omega
Specialty Chemistry
Date 2024 Feb 26
PMID 38405518
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Abstract

Cellulose-based materials are gaining increasing attention in the packaging industry as sustainable packaging material alternatives. Lignocellulosic polymers with high quantities of surface hydroxyls are inherently hydrophilic and hygroscopic, making them moisture-sensitive, which has been retarding the utilization of cellulosic materials in applications requiring high moisture resistance. Herein, we produced lightweight all-cellulose fiber foam films with improved water tolerance. The fiber foams were modified with willow bark extract (WBE) and alkyl ketene dimer (AKD). AKD improved the water stability, while the addition of WBE was found to improve the dry strength of the fiber foam films and bring additional functionalities, that is, antioxidant and ultraviolet protection properties, to the material. Additionally, WBE and AKD showed a synergistic effect in improving the hydrophobicity and water tolerance of the fiber foam films. Nuclear magnetic resonance (NMR) spectroscopy indicated that the interactions among WBE, cellulose, and AKD were physical, with no formation of covalent bonds. The findings of this study broaden the possibilities to utilize cellulose-based materials in high-value active packaging applications, for instance, for pharmaceutical and healthcare products or as water-resistant coatings for textiles, besides bulk packaging materials.

Citing Articles

Sustainable Films Derived from spp. Bark: Improving Properties Through Chemical and Physical Pretreatments.

Rodrigues D, Schmitt P, Cordeiro L, Rodrigues M, Ribeiro A, Bosenbecker M Polymers (Basel). 2025; 17(1.

PMID: 39795508 PMC: 11722894. DOI: 10.3390/polym17010105.

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