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Yadong Zhao, Zheng Yang, Rusen Zhou, Bin Zheng, Meiling Chen, Fei Liu, Wenhua Miao, Renwu Zhou, Patrick Cullen, Zhenhai Xia, Liming Dai, Kostya (Ken) Ostrikov. Bacterial nanocellulose assembly into super-strong and humidity-responsive macrofibers[J]. Journal of Bioresources and Bioproducts. doi: 10.1016/j.jobab.2024.03.005
Citation: Yadong Zhao, Zheng Yang, Rusen Zhou, Bin Zheng, Meiling Chen, Fei Liu, Wenhua Miao, Renwu Zhou, Patrick Cullen, Zhenhai Xia, Liming Dai, Kostya (Ken) Ostrikov. Bacterial nanocellulose assembly into super-strong and humidity-responsive macrofibers[J]. Journal of Bioresources and Bioproducts. doi: 10.1016/j.jobab.2024.03.005

Bacterial nanocellulose assembly into super-strong and humidity-responsive macrofibers

doi: 10.1016/j.jobab.2024.03.005
  • Available Online: 2024-04-20
  • Cellulose macrofibers (MFs) are gaining increasing interest as natural and biodegradable alternatives to fossil-derived polymers for both structural and functional applications. However, simultaneously achieving their exceptional mechanical performance and desired functionality is challenging and requires complex processing. Here, we reported a one-step approach using a tension-assisted twisting (TAT) technique for MF fabrication from bacterial cellulose (BC). The TAT stretches and aligns BC nanofibers pre-arranged in hydrogel tubes to form MFs with compactly assembled structures and enhanced hydrogen bonding among neighboring nanofibers. The as-prepared BC MFs exhibited a very high tensile strength of 1057 MPa and exceptional lifting capacity (over 340000 when normalized by their own weight). Moreover, due to the volume expansion of BC nanofibers upon water exposure, BC MFs quickly harvested energy from environmental moisture to untwist the bundled networks, thus generating a torsional spinning with a peak rotation speed of 884 r/(min·m). The demonstrated rapid and intense actuation response makes the MFs ideal candidates for diverse humidity-response-based applications beyond advanced actuators, remote rain indicators, intelligent switches, and smart curtains.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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