文献类型：期刊文献

英文题名：Superelastic, Hygroscopic, and Ionic Conducting Cellulose Nanofibril Monoliths by 3D Printing

作者：Chen, Yuan[1,2] Yu, Zhengyang[2] Ye, Yuhang[2] Zhang, Yifan[2] Li, Gaiyun[1] Jiang, Feng[2,3]

第一作者：Chen, Yuan;陈媛

通信作者：Jiang, F[1];Jiang, F[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Univ British Columbia, Dept Wood Sci, Sustainable Funct Biomat Lab, Vancouver, BC V6T 1Z4, Canada;[3]Univ British Columbia, BioProd Inst, Vancouver, BC V6T 1Z4, Canada

年份：2021

卷号：15

期号：1

起止页码：1869-1879

外文期刊名：ACS NANO

收录：;EI(收录号：20210509845636);Scopus(收录号：2-s2.0-85099940799);WOS:【SCI-EXPANDED(收录号:WOS:000613942700155)】；

基金：Y.C. gratefully acknowledges support from the National Natural Science Foundation of China (31700480 and 31890771). Y.H.Y. thanks the Four-Year Doctoral Fellowship (4YF) program at UBC for its financial support. F.J. acknowledges Canada Research Chairs program (231928), the Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2018-06818], and Canada Foundation for Innovation-John R. Evans Leaders Fund (CFI-JELF No. 37517).

语种：英文

外文关键词：3D printing; cellulose nanofibrils; superelastic; shape recovery; hygroscopic salt; pressure sensor

摘要：Compressible and superelastic 3D printed monoliths have shown great promise in various applications including energy storage, soft electronics, and sensors. Although such elastic monoliths have been constructed using some limited materials, most notably graphene, it has not yet been achieved in nature's most abundant material, cellulose, partly due to the strong hydrogen-bonding network within cellulose. Here, we report a 3D-printed cellulose nanofibril monolith that demonstrates superb elasticity (over 91% strain recovery after 500 cycles of compressive test), compressibility (up to 90% compressive strain), and pressure sensitivity (0.337 kPa(-1)) at 43% relative humidity. Such a high-performance CNF monolith is achieved through both hierarchical architecture design by 3D printing and freeze-drying and incorporation of hygroscopic salt for water absorption. The facile and efficient design strategy for a highly flexible CNF monolith is expected to expand to materials beyond cellulose and can realize much broader applications in flexible sensors, thermal insulation, and many other fields.