首页|Mechanical tough and stretchable quaternized cellulose nanofibrils/MXene conductive hydrogel for flexible strain sensor with multi-scale monitoring

Mechanical tough and stretchable quaternized cellulose nanofibrils/MXene conductive hydrogel for flexible strain sensor with multi-scale monitoring

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For advanced conductive hydrogels,adaptable mechanical properties and high conductivity are essential requirements for practical application,e.g.,soft electronic devices.Here,a straightforward strategy to de-velop a mechanically robust hydrogel with high conductivity by constructing complicated 3D structures composed of covalently cross-linked polymer network and two nanofillers with distinguishing dimensions is reported.The combination of one-dimensional quaternized cellulose nanofibrils(QACNF)and two-dimensional MXene nanosheets not only provides prominent and tunable mechanical properties modu-lated by materials composition,but results in electronically conductive path with high conductivity(1281 mS m-1).Owing to the uniform interconnectivity of network structure attributed to the strong macro-molecular interaction and nano-reinforced effect,the resultant hydrogel exhibits a balanced mechanical feature,i.e.,high tensile strength(449 kPa),remarkable stretchability(＞1700％),and ultra-high tough-ness(5.46 MJ m-3),outperforming those of virgin one.Additionally,the enhanced conductive characteris-tic with the aid of QACNF enables hydrogels with impressive electromechanical behavior,containing high sensitivity(maximum gauge factor:2.24),wide working range(0-1465％),and fast response performance(response time:141 ms,recover time:140 ms).Benefiting from the excellent mechanical performance,a flexible strain sensor based on such conductive hydrogel can deliver an appealing sensing performance of monitoring multi-scale deformations,from large and monotonous mechanical deformation to tiny and complex physiological motions(e.g.,joint movement and signature/vocal recognition).Together,the hy-drogel material in this work opens up opportunities in the design and fabrication of advanced gel-based materials for emerging wearable electronics.

Conductive hydrogelMechanical performanceMXeneCellulose nanofibrilsMultiple interactionsFlexible sensor

Qing-Yue Ni、Xiao-Feng He、Jia-Lin Zhou、Yu-Qin Yang、Zi-Fan Zeng、Peng-Fei Mao、Yu-Hang Luo、Jin-Meng Xu、Baiyu Jiang、Qiang Wu、Ben Wang、Yu-Qing Qin、Li-Xiu Gong、Long-Cheng Tang、Shi-Neng Li

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College of Chemistry and Materials Engineering,Zhejiang A&F University,Hangzhou 311300,China

College of Chemistry and Materials Engineering,Zhejiang A & F University,Hangzhou 311300,China

Shaoxing Institute,Zhejiang University,Shaoxing 312000,China

State Key Lab for Manufacturing Systems Engineering,Xi'an Jiaotong University,Xi'an 710049,China

Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education,College of Material Chemistry and Chemical Engineering,Hangzhou Normal University,Hangzhou 311121,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaResearch Foundation of Talented Scholars of Zhejiang A & F UniversityResearch Foundation of Talented Scholars of Zhejiang A & F UniversityZhejiang A&F University Scientific Research Training Program for UndergraduatesKey Research and Development Program of Shaanxi

5220314851973047120021132020FR0702021FR024S2022103411862022-JBGS3-09

2024

10.1016/j.jmst.2023.12.048

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.191(24)