Bio-inspired, UV-blocking, water-stable and antioxidant lignin/cellulose films combining high strength, toughness and flexibility

The use of low-cost, efficient methods to prepare thin-film materials to partially replace conventional materials in new applications is appealing. In this work, inspired by natural biological materials, we propose a strategy to prepare lignin/cellulose films with exceptional strength and flexibilit...

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Bibliographic Details
Published in:Materials chemistry frontiers 2023-02, Vol.7 (5), p.897-95
Main Authors: Cui, Boyu, Liu, Liangxian, Li, Shuang, Wang, Wen, Tan, Lei, Liu, Chaodong, Wang, Weihong
Format: Article
Language:English
Subjects:
Antioxidants
Biological materials
Bonding strength
Cellulose
Circuit boards
Flexibility
Hydrogen bonds
Industrial wastes
Integrated circuits
Lignin
Tensile strength
Thin films
Toughness
Ultrasonic processing
Zinc chloride
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Summary:The use of low-cost, efficient methods to prepare thin-film materials to partially replace conventional materials in new applications is appealing. In this work, inspired by natural biological materials, we propose a strategy to prepare lignin/cellulose films with exceptional strength and flexibility by building a sacrificial network. Coordination bonds and hydrogen bonds were constructed with ultrasonic treatment and the addition of ZnCl 2 to lignin/cellulose films. The resulting films exhibited an outstanding tensile strength (up to 138.14 Mpa) and toughness (up to 12.88 MJ m −3 ). The excellent flexibility (folding resistance of 2687 times) allowed the film to be folded into complex shapes. Due to the addition of functional industrial waste lignin, the film displayed UV-blocking, water-stable, and antioxidant properties. The lignin/cellulose film is expected to be used in several new fields such as UV-blocking polymers and flexible integrated circuit boards in emerging electronics. Lignocellulosic films with good properties are prepared by constructing sacrificial networks of hydrogen and coordination bonds, and are expected to be used in several emerging fields.
ISSN:2052-1537
2052-1537
DOI:10.1039/d2qm00842d