کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5189066 1381176 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tubular bacterial cellulose gel with oriented fibrils on the curved surface
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Tubular bacterial cellulose gel with oriented fibrils on the curved surface
چکیده انگلیسی

On static cultivation, Acetobacter xylinum synthesizes bacterial cellulose (BC) that has a gel-like fibril network with inappropriate orientation at the air/liquid interface. This can be easily molded into desired shapes and sizes during synthesis. Here, we report a simple technique to synthesize tubular BC (BC-TS) gel with proper fibril orientation. We found that culturing BC in oxygen-permeable silicone tubes with inner diameter <8 mm yields a BC-TS gel of the desired length, inner diameter, and thickness with uniaxially oriented fibrils. The fibrils are oriented along the longitudinal axis of the silicone tube, independent of gravity, oxygen availability, and the morphology of the inner surface of the silicone tube but dependent on the curvature of the silicone tube. The degree of orientation (Δn) of the BC-TS fibrils, as revealed by their birefringence, increases with decrease in the inner diameter of the silicone tube. BC-TS with a uniaxially oriented fibril structure has excellent mechanical properties and holds promise for use as a microvessel or soft tissue material in medical and pharmaceutical applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 49, Issue 7, 1 April 2008, Pages 1885-1891
نویسندگان
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