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题名: High strength films with gas-barrier fabricated from chitin solution dissolved at low temperature
作者: Duan, Bo1;  Chang, Chunyu1;  Ding, Beibei1;  Cai, Jie1;  Xu, Min2;  Feng, Shichao3;  Ren, Jizhong3;  Shi, Xiaowen4;  Du, Yumin4;  Zhang, Lina1
刊名: JOURNAL OF MATERIALS CHEMISTRY A
发表日期: 2013
DOI: 10.1039/c2ta00068g
卷: 1, 期:5, 页:1867-1874
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Energy & Fuels ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Energy & Fuels ;  Materials Science
英文摘要: The fabrication of pure chitin materials remains a challenge due to the difficult dissolution and regeneration of chitin. It has been a stumbling block for chitin research and utilization. In this work, chitin was dissolved completely in 11 wt% NaOH-4 wt% urea aqueous solution via the freezing/thawing method without derivatization, as supported by C-13 NMR spectra. The pure regenerated chitin films with high strength were successfully prepared from the transparent chitin solution by coagulating with ethanol or 45 wt% dimethylacetamide (DMAc) aqueous solution. The influences of the interactions between the chitin solution and coagulants on the structure and properties of the chitin films were investigated by UV, FT-IR spectra, scanning electron microscopy, X-ray diffraction, nitrogen adsorption isotherms, thermo-gravimetric analysis and tensile testing, indicating the good coagulating condition. The dissolution and regeneration of chitin was confirmed to be an entirely physical processes. The chitin films possessed homogeneous structure, high optical transmittance (87% at 800 nm), moderate thermal stability, as well as excellent tensile strength (up to 111 MPa). Moreover, these chitin films had good gas barrier properties (0.003 barrer for oxygen permeability), indicating great potentials in the materials field. This work would open up a completely new avenue with green technology to investigate the most intransigent chitin.
关键词[WOS]: NAOH/UREA AQUEOUS-SOLUTION ;  ALPHA-CHITIN ;  BETA-CHITIN ;  CELLULOSE ;  CHITOSAN ;  DISSOLUTION ;  POLYMERS ;  CHITIN/CHITOSAN ;  SPECTROSCOPY ;  NANOFIBERS
语种: 英语
WOS记录号: WOS:000314640100046
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137509
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China
2.E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
4.Wuhan Univ, Coll Resource & Environm Sci, Wuhan 430072, Peoples R China

Recommended Citation:
Duan, Bo,Chang, Chunyu,Ding, Beibei,et al. High strength films with gas-barrier fabricated from chitin solution dissolved at low temperature[J]. JOURNAL OF MATERIALS CHEMISTRY A,2013,1(5):1867-1874.
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