Journal ArticleDOI
Wood-Inspired Anisotropic Cellulose Nanofibril Composite Sponges for Multifunctional Applications.
Yiming Chen,Lin Zhang,Changtong Mei,Yang Li,Yang Li,Gaigai Duan,Seema Agarwal,Andreas Greiner,Chunxin Ma,Shaohua Jiang +9 more
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TLDR
Wood-inspired composite sponges consisting of cellulose nanofibrils and high aspect ratio silver nanowires were generated with anisotropic properties by the directional freeze-drying to broaden new applications as electronic devices for intelligent switch or EMI shielding.Abstract:
Nanocellulose-based porous materials have been recently considered as ideal candidates in various applications. However, challenges on performances remain owing to the disorderly structure and the limited transport specificity. Herein, wood-inspired composite sponges consisting of cellulose nanofibrils (CNFs) and high-aspect-ratio silver nanowires (AgNWs) were generated with anisotropic properties by the directional freeze-drying. The obtained composite sponges exhibited attractive features, such as an excellent compressive stress of 24.5 kPa, low percolation threshold of 0.1 vol % AgNWs, and high electrical conductivity of 1.52 S/cm. Furthermore, the self-assembled ordered structure in the longitudinal direction and synergistic effect between CNFs and AgNWs benefited the sponge interesting anisotropic electrical conductivity, thermal diffusivity, ultrafast electrically induced heating (<5 s), sensitive pressure sensing (errors <0.26%), and electromagnetic interference (EMI) shielding for special practical demands. This multifunctional material inspired by natural woods is expected to broaden new applications as electronic devices for an intelligent switch or EMI shielding.read more
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Construction, mechanism and prospective of conductive polymer composites with multiple interfaces for electromagnetic interference shielding: A review
TL;DR: In this paper, the authors reviewed conductive polymer composites (CPC) with multiple interfaces which have demonstrated to improve EMI SE, including foamed/porous, segregated, multi-component, multilayered/sandwiched and prefabricated conductive networks.
Journal ArticleDOI
Recent Progress on Nanocellulose Aerogels: Preparation, Modification, Composite Fabrication, Applications
TL;DR: Nanocellulose-based aerogels, using abundant and sustainable cellulose as raw material, present a third-generation of aerogel that combine traditional aeroglobels with high porosity and large specific surface area, as well as the excellent properties of cellulose itself as discussed by the authors.
Journal ArticleDOI
Multifunctional Ti3C2Tx-(Fe3O4/polyimide) composite films with Janus structure for outstanding electromagnetic interference shielding and superior visual thermal management
TL;DR: In this article , a flexible multifunctional polymer-based electromagnetic interference (EMI) shielding composite films have important application values in the fields of 5G communication technology, wearable electronic devices and artificial intelligence.
Journal ArticleDOI
Cellulose based composite foams and aerogels for advanced energy storage devices
Huayu Liu,Haishun Du,Ting Zheng,Kun Liu,Xingxiang Ji,Ting Xu,Xinyu Zhang,Chuanling Si,Chuanling Si +8 more
TL;DR: In this paper, a review of cellulose-based composite foams and aerogels for energy storage devices is presented, and the current challenges and future prospects of these materials are discussed.
Journal ArticleDOI
Electrospun fibrous materials and their applications for electromagnetic interference shielding: A review
Hongtao Guo,Yiming Chen,Yang Li,Yang Li,Wei Zhou,Wenhui Xu,Liang Pang,Xiaomeng Fan,Shaohua Jiang +8 more
TL;DR: In this paper, the basic mechanism of electrospinning technology and related EMI shielding are introduced, and different fibrous materials directly from electro-spinning for the electromagnetic interference (EMI) shielding are summarized.
References
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Journal ArticleDOI
Cellulose nanofibers prepared by TEMPO-mediated oxidation of native cellulose
TL;DR: Never-Dried and once-dried hardwood celluloses were oxidized by a 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated system, and highly crystalline and individualized cellulose nanofibers, dispersed in water, were prepared by mechanical treatment of the oxidized celluloses/water slurries.
Journal ArticleDOI
Freezing as a path to build complex composites.
TL;DR: It is demonstrated how the physics of ice formation can be used to develop sophisticated porous and layered-hybrid materials, including artificial bone, ceramic-metal composites, and porous scaffolds for osseous tissue regeneration with strengths up to four times higher than those of materials currently used for implantation.
Journal ArticleDOI
Wood-Derived Materials for Green Electronics, Biological Devices, and Energy Applications.
Hongli Zhu,Wei Luo,Peter N. Ciesielski,Zhiqiang Fang,Junyong Zhu,Gunnar Henriksson,Michael E. Himmel,Liangbing Hu +7 more
TL;DR: The goal of this study is to review the fundamental structures and chemistries of wood and wood-derived materials, which are essential for a wide range of existing and new enabling technologies.
Journal ArticleDOI
Thermally insulating and fire-retardant lightweight anisotropic foams based on nanocellulose and graphene oxide
Bernd Wicklein,Andraž Kocjan,German Salazar-Alvarez,Federico Carosio,Giovanni Camino,Markus Antonietti,Lennart Bergström +6 more
TL;DR: This work shows that freeze-casting suspensions of cellulose nanofibres, graphene oxide and sepiolite nanorods produces super-insulating, fire-retardant and strong anisotropic foams that perform better than traditional polymer-based insulating materials.
Journal ArticleDOI
Review of Hydrogels and Aerogels Containing Nanocellulose
Todd Hoare,Emily D. Cranston +1 more
TL;DR: A review of the field of hydrogels and aerogels incorporating nanocelluloses can be found in this paper, where over 200 references are summarized in comprehensive tables and a discussion of the challenges and benefits of using CNCs and CNFs as reinforcing agents in conventional plastics is presented.