摘要
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。
In this study, a bacterial cellulos （BC）/silver nanoparticle composite porous scaffold has been successfully prepared using BC gel, AgNO3 and NaBH4 solution as raw materials. Characteristics of the BC/silver nanopartilce composite porous scaffold are investigated by scanning electron microscopy （SEM）, energy dispersive X- ray spectroscopy （EDX）, X-ray diffraction （XRD）, thermogravimetric analysis （TGA）, tensile test and antibacteria propeties test. The results show that silver nanoparticles are homogeneously distributed throughout the whole bacterial cellulose network. With the concentration of AgNO3 and NaBH4 increasing, the size of silver nanoparticle increases. After the introduction of silver nanoparticle, the crystal structure of BC becomes less regular, crystallinity and tensile properties decrease, which might be associated with strong interaction between BC and silver nanopartilce. Whereas, the thermal stability and antibacteria properties have been greatly improved. In the result, the composite scaffold is more suitable for biomedical applications such as wound dressing.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第1期144-148,共5页
Polymer Materials Science & Engineering
基金
天津市自然科学基金资助项目(11JCYBJC02500)
关键词
细菌纤维素
银纳米粒子
复合
医用敷料
bacterial cellulose
silver nanoparticle
composite
wound dressing
作者简介
通讯联系人：蔡志江，主要从事生物医用高分子材料研究，E—mail：zhijiangcai@sina．com
