کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7784994 | 1500603 | 2017 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Factors affecting microstructure, physicochemical and textural properties of a novel Gum tragacanth-PVA blend cryogel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Factors affecting microstructure, physicochemical and textural properties of a novel Gum tragacanth-PVA blend cryogel Factors affecting microstructure, physicochemical and textural properties of a novel Gum tragacanth-PVA blend cryogel](/preview/png/7784994.png)
چکیده انگلیسی
Gum tragacanth (GT) gels are usually formed by using chemical crosslinkers which cause safety concerns owing to their toxicity. This study introduces a novel and safe method for gelation of GT in the presence of small amounts of polyvinyl alcohol (PVA) followed by successive freeze-thaw (F-T) cycles. Gel formation was performed at two GT: PVA mixing ratios (1:1 and 3:1), four F-T consecutive cycles and two different thawing temperatures (25 and 5 °C). Gel fraction, syneresis as well as mechanical properties and microstructural characteristics of the resultant gels were then studied. Gel fraction and mechanical properties improved by increasing F-T cycles and decreasing thawing temperature. Gel fraction increased by increasing the number of F-T cycles and decreasing the thawing temperature. Syneresis increased by increasing F-T cycles at GT: PVA mixing ratio of 1:1; whilst it was diminished at GT: PVA mixing ratio of 3:1. Microstructural observations by SEM confirmed mechanical properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 155, 2 January 2017, Pages 475-482
Journal: Carbohydrate Polymers - Volume 155, 2 January 2017, Pages 475-482
نویسندگان
Nushin Niknia, Rassoul Kadkhodaee,