Intermolecular Interaction and the Extended Wormlike Chain Conformation of Chitin in NaOH/Urea Aqueous Solution

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	Intermolecular Interaction and the Extended Wormlike Chain Conformation of Chitin in NaOH/Urea Aqueous Solution
	Fang, Yan 1; Duan, Bo 1; Lu, Ang 1; Liu, Maili 2; Liu, Huili 2; Xu, Xiaojuan 1; Zhang, Lina 1
刊名	BIOMACROMOLECULES
	2015-04-01
卷号	16 期号:4 页码:1410-1417
英文摘要	The intra- and intermolecular interactions of chitin in NaOH/urea aqueous system were studied by a combination of NMR measurements (including C-13 NMR, Na-23 NMR, and N-15 NMR) and differential scanning calorimetry. The results revealed that the NaOH and chitin formed a hydrogen-bonded complex that was surrounded by the urea hydrates to form a sheath-like structure, leading to the good dissolution. The optimal concentration range, in which chitin was molecularly dispersed in NaOH/urea aqueous, was found to investigate the chain conformation in the dilute solution with a combination of static and dynamic light scattering. The weight-average molecular weight (M-w), radii of gyration (< R-g >(z)), and hydrodynamic radii (< R-h >(z)) values of chitin were determined, and the structure-sensitive parameter (rho) and persistent length (L-p) were calculated to be >2.0 and similar to 30 nm, respectively, suggesting an extended wormlike chain conformation. The visualized images from TEM, cryo-TEM, and AFM indicated that, chitin nanofibers were fabricated from the parallel aggregation of chitin chains in NaOH/urea system. This work would provide a theoretical guidance for constructing novel chitin-based nanomaterials via bottom-up method at the molecular level.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Biochemistry & Molecular Biology ; Chemistry, Organic ; Polymer Science
研究领域[WOS]	Biochemistry & Molecular Biology ; Chemistry ; Polymer Science
关键词[WOS]	LIGHT-SCATTERING ; PHASE-TRANSITION ; DILUTE-SOLUTION ; HYDROGELS ; CHITOSAN ; DISSOLUTION ; CELLULOSE ; RATES ; UREA
收录类别	SCI
语种	英语
WOS记录号	WOS:000353006000036
公开日期	2015-07-14
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/1071]
专题	武汉物理与数学研究所_磁共振基础研究部
作者单位	1.Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, State Key Lab Magnet Resonance & Mol Phys, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China
推荐引用方式 GB/T 7714	Fang, Yan,Duan, Bo,Lu, Ang,et al. Intermolecular Interaction and the Extended Wormlike Chain Conformation of Chitin in NaOH/Urea Aqueous Solution[J]. BIOMACROMOLECULES,2015,16(4):1410-1417.
APA	Fang, Yan.,Duan, Bo.,Lu, Ang.,Liu, Maili.,Liu, Huili.,...&Zhang, Lina.(2015).Intermolecular Interaction and the Extended Wormlike Chain Conformation of Chitin in NaOH/Urea Aqueous Solution.BIOMACROMOLECULES,16(4),1410-1417.
MLA	Fang, Yan,et al."Intermolecular Interaction and the Extended Wormlike Chain Conformation of Chitin in NaOH/Urea Aqueous Solution".BIOMACROMOLECULES 16.4(2015):1410-1417.