Nanocellulose, owing to its environmentally friendly and unique attributes, is gaining traction in various industries. However, commercialization of nanocellulose faces challenges due to structural alterations during drying process, leading to irreversible aggregation. This study, inspired by wood's natural structure, introduces a cellulose nanofibril (CNF) drying system using hemicellulose hydrolysate (HH) as a capping agent. The addition of only 1 wt% of HH to the CNF suspension not only prevents aggregation among CNFs during dehydration and drying but also dramatically enhances the redispersion rate and dispersion stability of the dried CNFs. The redispersed CNF/HH suspension exhibits physicochemical properties comparable to the original CNF suspension before drying. This confirms that HH inhibits irreversible hydrogen bonding among CNFs, leading to the restoration of the nanostructure during redispersion. Moreover, HH in the CNF suspension after redispersion can be easily removed through a simple water rinsing process, highlighting HH as a highly suitable candidate for preventing aggregation of CNFs.

中文翻译：

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半纤维素水解物添加量对纤维素纳米纤丝脱水和再分散特性的影响

纳米纤维素由于其环保和独特的属性，在各个行业中越来越受到关注。然而，纳米纤维素的商业化面临着挑战，因为干燥过程中结构发生变化，导致不可逆的聚集。这项研究受木材自然结构的启发，引入了一种使用半纤维素水解物（HH）作为封端剂的纤维素纳米原纤维（CNF）干燥系统。在CNF悬浮液中仅添加1wt%的HH不仅可以防止脱水和干燥过程中CNF之间的聚集，而且还可以显着提高干燥CNF的再分散率和分散稳定性。再分散的 CNF/HH 悬浮液表现出与干燥前原始 CNF 悬浮液相当的物理化学性质。这证实了 HH 抑制了 CNF 之间的不可逆氢键，导致纳米结构在再分散过程中恢复。此外，再分散后的 CNF 悬浮液中的 HH 可以通过简单的水冲洗过程轻松去除，这表明 HH 是防止 CNF 聚集的非常合适的候选者。