کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5206056 1502946 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inelastic behaviour of bacterial cellulose hydrogel: In aqua cyclic tests
ترجمه فارسی عنوان
رفتار غیرقابل کنترل هیدروژل سلولز باکتری: در آزمایشات چرخه آبی
کلمات کلیدی
رفتار ناپیوسته، هیدروژل سلولز باکتریایی، در تست مکانیکی آکوامیک، مکانیزم تغییر شکل تنش سیکلی و فشرده سازی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Hydrogels are finding increasingly broad use, especially in biomedical applications. Their complex structure - a low-density network of microfibrils - defines their non-trivial mechanical behaviour. The focus of this work is on test-based quantification of mechanical behaviour of a bacterial cellulose (BC) hydrogel exposed to cyclic loading. Specimens for the tests were produced using Gluconacetobacter xylinus ATCC 53582 and tested in aqua under uniaxial cyclic loading conditions in a displacement-controlled regime. Substantial microstructural changes were observed in the process of deformation. A combination of qualitative microstructural observations with quantitative force-displacement relations allowed identification of main deformation mechanisms, confirming inelastic behaviour of the BC hydrogel under a loading-unloading-reloading regime. Elastic deformation was accompanied by non-elastic (viscoplastic) deformation in both tension and compression. This study also aims to establish a background for micromechanical modelling of overall properties of BC hydrogels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 44, July 2015, Pages 82-92
نویسندگان
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