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题名: Dependence of poly(3-hydroxybutyrate) crystal modifications on film thickness as revealed by reflection-absorption infrared spectroscopy
作者: Pi, Fuwei1, 2, 3; Wang, Jiping1; Suttiwijitpukdee, Nattaporn4; Chen, Xing5; Zhang, Jianming1
关键词: PHB ; Ultrathin-film ; Infrared ; beta-form ; Biodegradable thermoplastic ; Nanoscale
刊名: VIBRATIONAL SPECTROSCOPY
发表日期: 2016-09-01
卷: 86, 页:35-39
收录类别: SCI
英文摘要: Thickness-dependent ultrathin films of poly(3-hydroxybutyrate) (PHB) were investigated by using infrared reflection-absorption spectroscopy (IRRAS). It was first found that the autogenetic beta-form of PHB could be easily obtained through confining the film thickness under 20 nm at room temperature. Moreover, the interphase of PHB simultaneously exists with the beta-form of PHB in the films with a thickness less than 10 nm. With the film thickness increasing from several nanometers to about 30 nm, the PHB molecules gradually carry out an orientation shift at the b-axis of PHB crystallite; simultaneously, for the alpha-form of PHB a conformational rearrangement probably takes place for the growth of helical crystal unit cells in the ultrathin films. The molecular structures and crystal evolutions at sub-100 nm were explained in detail by analyzing the corresponding IRRAS features. (C) 2016 Elsevier B.V. All rights reserved.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35657
Appears in Collections:其它_期刊论文

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作者单位: 1.Qingdao Univ Sci & Technol, Minist Educ, Shandong Prov Key Lab Rubber Plast, Key Lab Rubber Plast, Qingdao 266042, Peoples R China
2.Jiangnan Univ, Coll Food Sci, State Key Lab Food Sci & Technol, Wuxi City 214122, Peoples R China
3.Collaborat Innovat Ctr Food Safety & Qual Control, Wuxi, Jiangsu, Peoples R China
4.Kasetsart Univ, Kasetsart Agr & Agroind Prod Improvement Inst KAP, Bangkok 10900, Thailand
5.Chinese Acad Sci ICCAS, Inst Chem, Beijing 100190, Peoples R China
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