Hemicellulose, as the second most abundant plant polysaccharide, are biodegradable, biocompatible, and abundant, yet its application in the field of nanomaterials has been little touched. Recently, we have integrated hemicellulose with liquid metals to access a series of stable conductive nano-inks with core-shell structures, either serve as nano catalyst for room temperature ultrafast gelation (&lt;10 s) or self-assemble into free-standing Janus films with high mechanical strength (~94 MPa). More importantly, we also successfully extracted high-valued laminated hemicellulose nanocrystals via several scalable top-down strategies (i.e., oxalic acid hydrolysis, ammonium persulfate oxidation, and alkaline periodate oxidation), featuring great water dispersibility, intriguing humidity sensitivity, and excellent biocompatibility. We also showcase the successful multidimensional material applications for phase-change materials, nanozymes, and household detergents. The scalable, low-cost, and sustainable hemicellulose nanocrystals can be envisioned to add another layer of polysaccharide chemistry.

Hemicellulose: New key players for bio-based nanomaterials

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