Citation: Xing Cao, Xinyu Tian, Yuanyuan Huang, Liping Zhang, Yanpeng Ni, Yu-Zhong Wang. H₃PO₃-protonated chitosan enabling flame-retardant and antibacterial PVA composite films with high strength and toughness through multiple H-bonds and interlocking interfaces[J]. Chinese Chemical Letters, ;2025, 36(11): 111382. doi: 10.1016/j.cclet.2025.111382 shu

H₃PO₃-protonated chitosan enabling flame-retardant and antibacterial PVA composite films with high strength and toughness through multiple H-bonds and interlocking interfaces

Xing Cao ^{a, 1} ,
Xinyu Tian ^{a, 1} ,
Yuanyuan Huang ^a ,
Liping Zhang ^a ,
Yanpeng Ni ^{a, *,} ,
Yu-Zhong Wang ^{b, *,}

a.
Institute of Functional Textiles and Advanced Materials, College of Textiles & Clothing, Qingdao Key Laboratory of Flame-Retardant Textile materials, National Engineering Research Center for Advanced Fire-Safety Materials D & A (Shandong), Qingdao University, Qingdao 266071, China
b.
The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), College of Chemistry, Sichuan University, Chengdu 610064, China

polyester-niyanpeng@qdu.edu.cn

yzwang@scu.edu.cn

Received Date: 28 February 2025
Revised Date: 26 May 2025
Accepted Date: 27 May 2025
Available Online: 28 May 2025

Figures(7)

Developing polymer materials combining high strength, toughness, multifunctionality, and environmental sustainability remains a major challenge. Herein, high-performance PVA-PCSx composite films were successfully fabricated by incorporating H₃PO₃-protonated chitosan (PCS) into the PVA matrix as both a bio-based multi-hydrogen-bonding crosslinking agent and a macromolecular flame retardant. Specifically, a comprehensive investigation was conducted on the hydrogen bonding interactions, microstructure, mechanical properties, antibacterial performance, and flame retardancy of the PVA-PCSx films. Strong hydrogen bonds between PCS and PVA enabled excellent compatibility and formed a unique mechanical interlocking interface architecture. This further resulted in superior transparency and synchronous reinforcement and toughening effects in the composites films. Compared with pure PVA, the PVA-PCSx films showed a 23%-51% increase in tensile strength and an 80%-108% improvement in fracture toughness. Moreover, PVA-PCSx films exhibited superior fire safety performance, achieving an LOI value of 31.3%, attaining UL-94 V-0 rating, and reducing the heat release rate by up to 73.1%. Additionally, PVA-PCSx films demonstrated 99.99% antibacterial efficacy against both Escherichia coli and Staphylococcus aureus. Collectively, this study presents a simple yet effective strategy for fabricating high-strength, high-toughness, multifunctional composites using biopolysaccharides as additives.
- Chitosan derivative,
- Bio-based flame retardants,
- Flame retardancy,
- Hydrogen bonding,
- Strengthening and toughening
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沈阳化工大学材料科学与工程学院沈阳 110142

H3PO3-protonated chitosan enabling flame-retardant and antibacterial PVA composite films with high strength and toughness through multiple H-bonds and interlocking interfaces

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通讯作者: 陈斌, bchen63@163.com

H₃PO₃-protonated chitosan enabling flame-retardant and antibacterial PVA composite films with high strength and toughness through multiple H-bonds and interlocking interfaces