کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9694091 | 1459639 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Swelling behaviour of calcium pectin hydrogels by thermomechanical analysis in water
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
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چکیده انگلیسی
Aqueous solutions of pectin annealed at various temperatures at sol state were mixed with CaCl2 solution and calcium pectin gels with various cross-linking ratios were prepared. A thermomechanical analyser (TMA) equipped with a sample holder, which was newly designed at our laboratory was used. The sample holder was immersed in water whose temperature was controlled from 30 to 80 °C. Swelling behaviour of hydrogels during equilibration was measured as a function of immersing time. Creep coefficient was calculated as functions of time and temperature using a compression type probe. The creep coefficient of hydrogels increased with increasing swelling temperature and decreased with increasing cross-linking ratio. Dynamic modulus (Eâ²) was measured in water in a temperature range from 30 to 60 °C. Eâ² of the gel with cross-linking ratio 0.36 decreased from 5.5 Ã 104 to 3.5 Ã 104 Pa with increasing swelling temperature from 30 to 60 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 431, Issues 1â2, 15 June 2005, Pages 68-72
Journal: Thermochimica Acta - Volume 431, Issues 1â2, 15 June 2005, Pages 68-72
نویسندگان
Mika Iijima, Tatsuko Hatakeyama, Hyoe Hatakeyama,