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Jingyuan Xu, Daniel Solaiman, Richard D. Ashby, Rafael A. Garcia, Sherald H. Gordon and Rogers E. Harry-O'kuru. Properties of starch¨Cpolyglutamic acid (PGA) graft copolymer prepared by microwave irradiation − Fourier transform infrared spectroscopy (FTIR) and rheology studies. Starch, 3 JUN 2016, DOI: 10.1002/star.201600021

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maomaoz: ½ð±Ò+10, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸, лл 2017-05-04 22:25:45
sunshan4379: LS-EPI+1, ¸ÐлӦÖú£¡ 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

×÷Õß: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

¾í: 69

ÆÚ: 3-4

ÌØ¿¯: SI

ÎÄÏ׺Å: UNSP 1600021

DOI: 10.1002/star.201600021

³ö°æÄê: MAR 2017

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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.
¹Ø¼ü´Ê

×÷Õ߹ؼü´Ê:Attenuated total reflectance; Fourier transform infrared spectroscopy (ATR/FTIR); Graft copolymers; Poly-gamma-glutamic acid (PGA); Rheology; Starch

KeyWords Plus:CARBOPOL GELS
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ͨѶ×÷ÕßµØÖ·: Xu, JY (ͨѶ×÷Õß)
[ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ]         ARS, USDA, Natl Ctr Agr Utilizat Res, 1815 North Univ St, Peoria, IL 61604 USA.

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[ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ]         [ 1 ] ARS, USDA, Natl Ctr Agr Utilizat Res, 1815 North Univ St, Peoria, IL 61604 USA
[ÏÔʾÔöÇ¿×éÖ¯ÐÅÏ¢µÄÃû³Æ]         [ 2 ] ARS, USDA, Eastern Reg Res Ctr, Wyndmoor, PA USA

µç×ÓÓʼþµØÖ·:james.xu@ars.usda.gov
»ù½ð×ÊÖúÖÂл
»ù½ð×ÊÖú»ú¹¹        ÊÚȨºÅ
US Department of Agriculture, Agricultural Research Service          
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WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
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Ñо¿·½Ïò:Food Science & Technology

Web of Science Àà±ð:Food Science & Technology
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ÎÄÏ×ÀàÐÍ:Article

ÓïÖÖ:English

Èë²ØºÅ: WOS:000395633600005

ISSN: 0038-9056

eISSN: 1521-379X
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    Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports®

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IDS ºÅ: EM9LR

Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 25

Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0
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