Biodegradable Dual-Network Cellulosic Composite Bioplastic Metafilm for Plastic Substitute

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

4 Scopus Citations
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Author(s)

  • Dong Wang
  • Yanyun Mao
  • Shaohai Fu

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article numbere202310995
Journal / PublicationAngewandte Chemie - International Edition
Volume62
Issue number50
Online published29 Oct 2023
Publication statusPublished - 11 Dec 2023

Abstract

With the escalating environmental and health concerns over petroleum-based plastics, sustainable and biodegradable cellulosic materials are a promising alternative to plastics, yet remain unsatisfied properties such as fragility, inflammability and water sensitivity for practical usage. Herein, we present a novel dual-network design strategy to address these limitations and fabricate a high-performance cellulosic composite bioplastic metafilm with the exceptional mechanical toughness (23.5 MJ m−3), flame retardance, and solvent resistance by in situ growth of cyclotriphosphazene-bridged organosilica network within bacterial cellulose matrix. The phosphorus, nitrogen-containing organosilica network, verified by the experimental and theoretical results, plays a triple action on significantly enhancing tensile strength, toughness, flame retardance and water resistance of composite bioplastic metafilm. Furthermore, cellulosic bioplastic composite metafilm demonstrates a higher maximum usage temperature (245 °C), lower thermal expansion coefficient (15.19 ppm °C−1), and better solvent resistance than traditional plastics, good biocompatibility and natural biodegradation. Moreover, the composite bioplastic metafilm have a good transparency of average 74 % and a high haze over 80 %, which can serve as an outstanding substrate substitute for commercial polyethylene terephthalate film to address the demand of flexible ITO films. This work paves a creative way to design and manufacture the competitive bioplastic composite to replace daily-used plastics. © 2023 Wiley-VCH GmbH.

Research Area(s)

  • Cellulosic Composite Bioplastic Metafilm, Dual-Network Strategy, Flame Retardance, Plastic Substitute, Super Toughness