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°ïæ²éÒ»ÏÂÕâÆªÎÄÕÂÓÐûÓб»SCI¼ìË÷: 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
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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
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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 ²é¿´ÆÚ¿¯ÐÅÏ¢ ÕªÒª 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 ×÷ÕßÐÅÏ¢ ͨ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. µØÖ·: [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 ²é¿´»ù½ð×ÊÖúÐÅÏ¢ ³ö°æÉÌ WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY Àà±ð / ·ÖÀà Ñо¿·½Ïò:Food Science & Technology Web of Science Àà±ð:Food Science & Technology ÎÄÏ×ÐÅÏ¢ ÎÄÏ×ÀàÐÍ:Article ÓïÖÖ:English Èë²ØºÅ: WOS:000395633600005 ISSN: 0038-9056 eISSN: 1521-379X ÆÚ¿¯ÐÅÏ¢ Impact Factor (Ó°ÏìÒò×Ó): Journal Citation Reports® ÆäËûÐÅÏ¢ IDS ºÅ: EM9LR Web of Science ºËÐĺϼ¯ÖÐµÄ "ÒýÓõIJο¼ÎÄÏ×": 25 Web of Science ºËÐĺϼ¯ÖÐµÄ "±»ÒýƵ´Î": 0 |

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