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Efficient preparation of holocellulose nanofibers and their reinforcement potential

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Abstract

Preparation of cellulose nanofibers or nanocrystals with large-scale by traditional methods is facing a scientific challenge due to the complex technological process, excessive energy consumption and environmental pollution. Herein, the novel holocellulose nanofibers (HNFs) were obtained from different lignocellulosic biomass, including wheat straw, bamboo (Neosinocalamus affinis), hardwood (Populus nigra), and softwood (Monterey pine) by mechanical or TEMPO-mediated oxidation method. Compared with TEMPO-mediated oxidation, HNFs prepared by mechanical method exhibit higher hemicellulose content, well preserved natural structure (a core-shell structure), and high crystallinity. Significantly, the mechanical processing is simple and more suitable for large-scale production. After introducing HNFs, the mechanical property of polyvinyl alcohol (PVA) film increased dramatically. In particular, the Young’s modulus of HNFs/PVA composite film is 25.12 times higher than that of pure PVA. These results suggest that HNFs can be used as versatile reinforcement to construct composite materials with excellent performance.

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A novel nano-holocellulose could be replace cellulose to construct functional material was prepared by mechanical or TEMPO-mediated oxidation methods from different lignocellulosic biomass.

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Acknowledgments

This work was supported by the Bei**g Forestry University Outstanding Young Talent Cultivation Project (2019JQ03017), Bei**g Municipal Natural Science Foundation (6222044), and Ministry of Education, China-111 Project (BP0820033).

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Correspondence to Jun Rao or Feng Peng.

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Ding, Q., Rao, J., Lv, Z. et al. Efficient preparation of holocellulose nanofibers and their reinforcement potential. Cellulose 29, 8229–8242 (2022). https://doi.org/10.1007/s10570-022-04765-6

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  • DOI: https://doi.org/10.1007/s10570-022-04765-6

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