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以细菌纤维素水凝胶膜、硝酸银和硼氢化钠为原料,制备了细菌纤维素/银纳米粒子多孔复合支架,并利用扫描电子显微镜、能谱分析、X射线衍射、热失重及力学性能测试对多孔复合支架进行研究.结果表明,在细菌纤维素网络结构内部发现了银纳米粒子,表明银纳米粒子进入到细菌纤维素内部,形成细菌纤维素/银纳米粒子复合物;并且,银纳米粒 子的粒径随着硝酸银和硼氢化钠浓度的升高而变大;银粒子的引入使细菌纤维素的链规整度有所下降,结晶度变小、力学性能下降,但材料具有了良好的抗菌性能,使其更适用于医用敷料领域.

参考文献

[1] Eichhorn SJ.;Zafeiropoulos N.;Mwaikambo LY.;Ansell MP. Dufresne A.;Entwistle KM.;Herrera-Franco PJ.;Escamilla GC.;Groom L. Hughes M.;Hill C.;Rials TG.;Wild PM.;Baillie CA. .Review: Current international research into cellulosic fibres and composites [Review][J].Journal of Materials Science,2001(9):2107-2131.
[2] Czaja W;Krystynowicz A;Bielecki S;Brown RM .Microbial cellulose - the natural power to heal wounds[J].Biomaterials,2006(2):145-151.
[3] Backdahl H;Helenius G;Bodin A;Nannmark U;Johansson BR;Risberg B;Gatenholm P .Mechanical properties of bacterial cellulose and interactions with smooth muscle cells[J].Biomaterials,2006(9):2141-2149.
[4] Thawatchai Maneerung;Seiichi Tokura;Ratana Rujiravanit .Impregnation of silver nanoparticles into bacterial cellulose for antimicrobial wound dressing[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2008(1):43-51.
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