Preparation, Rheological Behavior, and Redispersibility of Bamboo‐Derived Holocellulose Nanofibers

ABSTRACT With the demand for sustainable preparation of nanocellulose, the extraction of holocellulose nanofibers with surface‐coated hemicellulose from various biomass is drawing more and more attention. However, detailed preparation processes and some fundamental properties of holocellulose nanofibers, such as rheological behavior and redispersibility, still need systematic investigation. An in‐depth understanding of these processes and properties plays a crucial role in guiding the preparation and subsequent material design of holocellulose nanofibers. Herein, a concise method is reported to prepare bamboo‐derived holocellulose nanofibers (BHCNFs) from bamboo residue and has been characterized in detail. To facilitate subsequent application, comprehensive exploration and understanding of the rheological behavior of BHCNF were conducted, along with an investigation into the redispersibility after freeze‐drying. The presence of hemicellulose significantly affects the rheological behavior and gives BHCNF a certain redispersibility. To achieve better redispersibility, aerogel powder was prepared via spray freeze‐drying, offering new insights into the drying and practical application of BHCNF.