Journal
ADVANCED MATERIALS
Volume 33, Issue 28, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202000657
Keywords
biopolymer aerogels; cellulose nanocrystals; cellulose nanofibrils; self-assembly; structured biomaterials
Categories
Funding
- Natural Science and Engineering Research Council of Canada (NSERC) Postdoctoral Fellowship
- China Scholarship Council Fellowship
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Utilizing nanocellulose as a renewable and naturally sourced nanoscale building block holds significant research interest in the field of bottom-up fabricated materials. The organization of nanocellulose into biomimetic-aligned, porous, and fibrous materials through various fabrication techniques has advanced structure-based functionality. Design rules based on the fundamental properties of nanocellulose are established to influence material assembly and resulting structure/function.
It is inherently challenging to recapitulate the precise hierarchical architectures found throughout nature (such as in wood, antler, bone, and silk) using synthetic bottom-up fabrication strategies. However, as a renewable and naturally sourced nanoscale building block, nanocellulose-both cellulose nanocrystals and cellulose nanofibrils-has gained significant research interest within this area. Altogether, the intrinsic shape anisotropy, surface charge/chemistry, and mechanical/rheological properties are some of the critical material properties leading to advanced structure-based functionality within nanocellulose-based bottom-up fabricated materials. Herein, the organization of nanocellulose into biomimetic-aligned, porous, and fibrous materials through a variety of fabrication techniques is presented. Moreover, sophisticated material structuring arising from both the alignment of nanocellulose and via specific process-induced methods is covered. In particular, design rules based on the underlying fundamental properties of nanocellulose are established and discussed as related to their influence on material assembly and resulting structure/function. Finally, key advancements and critical challenges within the field are highlighted, paving the way for the fabrication of truly advanced materials from nanocellulose.
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