کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8880562 1624797 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mechanically blown wall-projected tannin-based foams
ترجمه فارسی عنوان
فوم های مبتنی بر تانن بر روی دیوار به طور مکانیکی فرسوده شده
کلمات کلیدی
تانن، فوم فوم مکانیکی، فوم کنسانتره، هدایت حرارتی، کبراچو،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم زراعت و اصلاح نباتات
چکیده انگلیسی
Condensed flavonoid tannin-based foams from quebracho tannin extract have been developed using a new method of expansion based on fire-fighting or tunneling foams, where a foam concentrate forms a stable liquid foam. This new mechanical method of expansion allows obtaining a solid porous material after curing and hardening at room temperature, through a liquid foam formed by a tannin resin and an aqueous solution of surfactant. The stability of the as-obtained liquid foam and the influence of the amount of catalyst are reported. The use of this new approach for preparing tannin-based rigid foams avoids the problem of shrinkage presented by many other formulations where physical or chemical foaming is employed. Non-ionic surfactants have also been used in the formulation to obtain smaller cells and improve the structure of the new material. Bulk density (0.069-0.080 g/cm3), mechanical (compressive strength of 0.034-0.13 MPa) and thermal (0.045-0.047 W m−1 K−1) properties and morphological appearance of the foams have been characterised and reported.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Industrial Crops and Products - Volume 113, March 2018, Pages 316-323
نویسندگان
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