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Soft Sci 2022;2:[Accepted].10.20517/ss.2022.20© The Author(s) 2022
Accepted Manuscript
Open AccessResearch Article

Mechanically flexible and flame-retardant cellulose nanofibril-based film integrated with MXene and chitosan 

Correspondence Address: Dr. Shi-Neng Li, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou, 311300, PR China. E-mail: lisn@zafu.edu.cn (S-N. Li); Prof. Li Peng, MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, PR China. E-mail: l-peng@zju.edu.cn; Dr. Baiyu Jiang, College of Chemistry and Materials Engineering, Zhejiang A & F University, Hangzhou, 311300, PR China. E-mail: jiangby@zafu.edu.cn

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© The Author(s) 2022. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, sharing, adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Abstract

Remarkable flame-retardance and integrated mechanical properties are vital needs for the potential applications of bio-based films in industrial areas. Unfortunately, the design and fabrication of such film materials that possess a good trade-off between mechanical properties and flame-retardant performance remain a significant challenge. Here, a phosphorylated cellulose nanofibril-based film integrated with chitosan and MXene (PCNF/CS-M) was fabricated via a facile water evaporation-induced self-assembly method. An evident reinforcement of the mechanical performance can be achieved by constructing additional interactions (i.e., hydrogen bonding and nano-reinforcement) among hybrid network, which endows the optimized films with highly improved and balanced mechanical performance (i.e., tensile strength of 172.1 MPa, tensile strain of 8.0%, Young’s modulus of 4.4 GPa and toughness of 8.5 MJ⸱m-3). Meanwhile, the resultant films also exhibited outstanding flame resistance, vividly illustrated by structural integrity after the cyclic flame attack (butane lamp: 700~800 oC). The synergistic reinforcing and flame-retardant mechanisms were clarified based on structural evolution and performance variation. Clearly, the strategy developed herein may provide an innovative concept for designing and developing advanced bio-based film materials for fireproof coatings. 

Cite This Article

Li SN, Zeng ZF, He XF, Xu ZC, Luo YH, Ni QY, Gong LX, Li Y, Peng L, Jiang B. Mechanically flexible and flame-retardant cellulose nanofibril-based film integrated with MXene and chitosan. Soft Sci 2022;2:[Accept]. http://dx.doi.org/10.20517/ss.2022.20

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