Journal ArticleDOI
Intermolecular Interactions and 3D Structure in Cellulose–NaOH–Urea Aqueous System
Zhiwei Jiang,Yan Fang,Junfeng Xiang,Yanping Ma,Ang Lu,Hongliang Kang,Yong Huang,Hongxia Guo,Ruigang Liu,Lina Zhang +9 more
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TLDR
It was found that there are direct interactions between OH(-) anions and amino groups of urea through hydrogen bonds and no direct interaction between urea and cellulose and the intermolecular interactions in cellulose/NaOH/urea aqueous solution were clarified.Abstract:
The dissolution of cellulose in NaOH/urea aqueous solution at low temperature is a key finding in cellulose science and technology. In this paper, 15N and 23Na NMR experiments were carried out to clarify the intermolecular interactions in cellulose/NaOH/urea aqueous solution. It was found that there are direct interactions between OH– anions and amino groups of urea through hydrogen bonds and no direct interaction between urea and cellulose. Moreover, Na+ ions can interact with both cellulose and urea in an aqueous system. These interactions lead to the formation of cellulose–NaOH–urea–H2O inclusion complexes (ICs). 23Na relaxation results confirmed that the formation of urea–OH– clusters can effectively enhance the stability of Na+ ions that attracted to cellulose chains. Low temperature can enhance the hydrogen bonding interaction between OH– ions and urea and improve the binding ability of the NaOH/urea/H2O clusters that attached to cellulose chains. Cryo-TEM observation confirmed the formation of cell...read more
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Recent advances in regenerated cellulose materials
Sen Wang,Ang Lu,Lina Zhang +2 more
TL;DR: In this paper, the widely used non-derivatizing cellulose solvents are summarized, including their dissolution mechanisms, with emphasis on the neat regenerated cellulose materials and the composite materials.
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Recent advances in nanocellulose for biomedical applications
Mehdi Jorfi,E. Johan Foster +1 more
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Cellulose in NaOH–water based solvents: a review
Tatiana Budtova,Patrick Navard +1 more
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Conceptually Novel Black Phosphorus/Cellulose Hydrogels as Promising Photothermal Agents for Effective Cancer Therapy.
Chenyang Xing,Shiyou Chen,Meng Qiu,Xin Liang,Quan Liu,Qingshuang Zou,Zhongjun Li,Zhongjian Xie,Dou Wang,Biqin Dong,Liping Liu,Dianyuan Fan,Han Zhang +12 more
TL;DR: The present work demonstrates that green and injectable composite hydrogels based on cellulose and BP nanosheets (BPNSs) are of great efficiency for PTT against cancer and may facilitate the development of BP–polymer‐based photothermal agents in the form of hydrogel for biomedical‐related clinic applications.
Journal ArticleDOI
Recent Progress in High-Strength and Robust Regenerated Cellulose Materials
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References
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