Tert-Butanol as a Structuring Agent for Cellulose Nanocrystal Fluids and Foams.

IF 5.5 2区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

Biomacromolecules Pub Date : 2025-07-18 DOI:10.1021/acs.biomac.5c00184

Saül Llácer Navarro, Elliot Orzan, Ratchawit Janewithayapun, Paavo Penttilä, John Andersson, Anna Ström, Roland Kádár, Tiina Nypelö

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Abstract

Nanocelluloses are uniquely valued for their high surface area and controllable assembly. This study elucidates the assembly of cellulose nanocrystals (CNCs) in tert-butanol (TBA) and water mixtures. We emphasize the influence of TBA on the structure of suspensions and freeze-dried foams. Although the length-scale of CNC organization is large relative to water-TBA structures, adding more than 30 wt % TBA shifted ordered CNC packing into an isotropic network. The change was attributed to the disruption of ionic interactions and adsorption of TBA to hydrophobic CNC interfaces; manifesting as a 5-fold increase in viscosity at 50 wt % TBA content. The freeze-dried foams' morphology was transformed due to TBA-modulated crystal growth during the freezing process. This led to the intriguing capability to control foams' mechanical strength and surface area, achieving up to 3 and 15-fold increases, respectively. The investigations highlight TBA's potential as a structuring agent in solvent-mediated design of nanomaterial systems.

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叔丁醇作为纤维素纳米晶流体和泡沫的结构剂。

纳米纤维素的独特价值在于其高表面积和可控制的组装。本研究阐明了纤维素纳米晶体（cnc）在叔丁醇（TBA）和水混合物中的组装。我们强调TBA对悬浮液和冻干泡沫结构的影响。虽然CNC组织的长度尺度相对于水-TBA结构较大，但添加超过30% wt %的TBA将有序的CNC包装转变为各向同性网络。这种变化归因于离子相互作用的破坏和TBA在疏水CNC界面上的吸附；表现为在TBA含量为50%时粘度增加5倍。冻干泡沫在冷冻过程中由于tba调制的晶体生长而改变了其形态。这导致了控制泡沫机械强度和表面积的有趣能力，分别实现了3倍和15倍的增加。这些研究强调了TBA在溶剂介导的纳米材料系统设计中作为结构剂的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Biomacromolecules 化学-高分子科学

CiteScore

10.60

自引率

4.80%

发文量

417

审稿时长

1.6 months

期刊介绍： Biomacromolecules is a leading forum for the dissemination of cutting-edge research at the interface of polymer science and biology. Submissions to Biomacromolecules should contain strong elements of innovation in terms of macromolecular design, synthesis and characterization, or in the application of polymer materials to biology and medicine. Topics covered by Biomacromolecules include, but are not exclusively limited to: sustainable polymers, polymers based on natural and renewable resources, degradable polymers, polymer conjugates, polymeric drugs, polymers in biocatalysis, biomacromolecular assembly, biomimetic polymers, polymer-biomineral hybrids, biomimetic-polymer processing, polymer recycling, bioactive polymer surfaces, original polymer design for biomedical applications such as immunotherapy, drug delivery, gene delivery, antimicrobial applications, diagnostic imaging and biosensing, polymers in tissue engineering and regenerative medicine, polymeric scaffolds and hydrogels for cell culture and delivery.