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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与，应助指数 +1
maomaoz: 金币+10, ★★★★★最佳答案, 谢谢 2017-05-04 22:25:45
sunshan4379: LS-EPI+1, 感谢应助！ 2017-05-05 19:47:56
Properties of starch-polyglutamic acid (PGA) graft copolymer prepared by microwave irradiation - Fourier transform infrared spectroscopy (FTIR) and rheology studies
作者:Xu, JY (Xu, Jingyuan)[ 1 ] ; Solaiman, D (Solaiman, Daniel)[ 2 ] ; Ashby, RD (Ashby, Richard D.)[ 2 ] ; Garcia, RA (Garcia, Rafael A.)[ 2 ] ; Gordon, SH (Gordon, Sherald H.)[ 1 ] ; Harry-O'kuru, RE (Harry-O'kuru, Rogers E.)[ 1 ]
STARCH-STARKE
卷: 69
期: 3-4
特刊: SI
文献号: UNSP 1600021
DOI: 10.1002/star.201600021
出版年: MAR 2017
查看期刊信息
摘要
The rheological properties of waxy starch--polygutamic acid (PGA) graft copolymers were investigated. Grafting was confirmed by FTIR spectroscopy. The starch-PGA copolymers absorbed water and formed gels, which exhibited concentration-dependent viscoelastic solid properties. Higher starch-PGA concentrations resulted in stronger viscoelastic properties. The analysis for moduli of different concentrations indicated that the starch-PGA graft copolymer gels were physical gels, meaning the cross-links between the molecules were physical junctions. However, stress relaxation measurements showed that the starch-PGA graft copolymer gels had long relaxation times, which result from the presence of the chemical cross-links that were evident in the FTIR spectra. The non-linear steady shearing rheological properties studies indicated that starch-PGA gels exhibited shear thinning behavior, which can be well fitted with the power law constitutive equation. The function and behavior of the starch-PGA graft copolymer gels suggest that this kind of starch-based biomaterial could be a potential candidate for applications in cosmetic gels, skin wound care materials, and agricultural products.
关键词
作者关键词:Attenuated total reflectance; Fourier transform infrared spectroscopy (ATR/FTIR); Graft copolymers; Poly-gamma-glutamic acid (PGA); Rheology; Starch
KeyWords Plus:CARBOPOL GELS
作者信息
通讯作者地址: Xu, JY (通讯作者)
[显示增强组织信息的名称] ARS, USDA, Natl Ctr Agr Utilizat Res, 1815 North Univ St, Peoria, IL 61604 USA.
地址:
[显示增强组织信息的名称] [ 1 ] ARS, USDA, Natl Ctr Agr Utilizat Res, 1815 North Univ St, Peoria, IL 61604 USA
[显示增强组织信息的名称] [ 2 ] ARS, USDA, Eastern Reg Res Ctr, Wyndmoor, PA USA
电子邮件地址:james.xu@ars.usda.gov
基金资助致谢
基金资助机构 授权号
US Department of Agriculture, Agricultural Research Service
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出版商
WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
类别 / 分类
研究方向:Food Science & Technology
Web of Science 类别:Food Science & Technology
文献信息
文献类型:Article
语种:English
入藏号: WOS:000395633600005
ISSN: 0038-9056
eISSN: 1521-379X
期刊信息
Impact Factor (影响因子): Journal Citation Reports®
其他信息
IDS 号: EM9LR
Web of Science 核心合集中的 "引用的参考文献": 25
Web of Science 核心合集中的 "被引频次": 0 |
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