کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7783452 | 1500570 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stability, microstructure and rheological behavior of konjac glucomannan-zein mixed systems
ترجمه فارسی عنوان
پایداری، ریزساختار و رفتار رئولوژیکی از سیستم های مخلوط کنجک گلوکومنن زین
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کلمات کلیدی
کنجک گلوکومنن، زین، نمودار فاز، توزیع ذرات، رئوئولوژی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
This study aims to investigate the stability, microstructure and rheological properties of konjac glucomannan (KGM)/zein mixed systems in different mixing ratios. A phase diagram was established by centrifugation and visual observation. KGM/zein could form a stable homogeneous dispersion with appropriate mixing formula, and the particle size in mixed systems increased with increasing zein content. During storage, zein particles increased in size but were homogeneously distributed in the continuous phase of KGM without flocculation as observed by confocal light scanning microscopy. The rate of particle size change slowed down with increasing concentration of KGM. Transmission electron microscopy and atomic force microscopy images showed that zein particles were distributed in the KGM molecular network. The mixed systems showed shear-thinning behavior, and the temperature dependence of the viscosity was well-fitted by the Arrhenius equation. Based on dynamic viscoelasticity analysis, the mixed systems showed typical behaviors for entangled polymer solutions. The shift of cross-over frequency of storage (Gâ²) and loss (Gâ³) moduli to higher frequencies with increasing concentration of zein implied the shortening of the lifetime of the temporary entangled junction in the mixed systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 188, 15 May 2018, Pages 260-267
Journal: Carbohydrate Polymers - Volume 188, 15 May 2018, Pages 260-267
نویسندگان
Xuewen Ni, Kai Wang, Kao Wu, Harold Corke, Katsuyoshi Nishinari, Fatang Jiang,