Preparation and characterization on mechanical and antibacterial properties of chitsoan/cellulose blends
Preparation and characterization on mechanical and antibacterial properties of chitsoan/cellulose blends
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DOI：
10.1016/j.carbpol.2004.05.013
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发表时间：
2004-09
影响因子：
11.2
通讯作者：
Y. Wu;S. Yu;F. Mi;C. Wu;S. Shyu;C. Peng;A. Chao
中科院分区：
文献类型：
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作者：
Y. Wu;S. Yu;F. Mi;C. Wu;S. Shyu;C. Peng;A. Chao
以三氟乙酸为共溶剂，制备了壳聚糖-纤维素共混物的多糖基膜。用Instron和动态力学热分析仪对膜的形貌和力学性能进行了研究。纤维素/壳聚糖共混物的力学和动态力学热性能似乎是由纤维素占主导地位，表明纤维素/壳聚糖共混物是不相容的。纤维素分子间的氢键被破坏形成纤维素-壳聚糖氢键;然而，分子内和链内氢键保持网络平坦。降低的水蒸气通过壳聚糖/纤维素膜的蒸腾速率表明，用作伤口敷料的膜可以防止伤口过度脱水。壳聚糖/纤维素共混膜对大肠杆菌和金黄色葡萄球菌表现出有效的抗菌能力。这些结果表明，壳聚糖/纤维素共混膜可能适合用作具有抗菌性能的伤口敷料。
Polysaccharides-based membranes of chitosan and cellulose blends were prepared using trifluoroacetic acid as a co-solvent. Morphology and mechanical property of prepared membranes were studied by Instron and dynamic mechanical thermal analysis. The mechanical and dynamic mechanical thermal properties of the cellulose/chitosan blends appear to be dominated by cellulose, suggests that cellulose/chitosan blends were not well miscible. It is believed that the intermolecular hydrogen bonding of cellulose is supposed to be break down to form cellulose–chitosan hydrogen bonding; however, the intra-molecular and intra-strand hydrogen bonds hold the network flat. The reduced water vapor transpiration rate through the chitosan/cellulose membranes indicates that the membranes used as a wound dressing may prevent wound from excessive dehydration. The chitosan/cellulose blend membranes demonstrate effective antimicrobial capability against Escherichia coli and Staphylococcus aureus, as examined by the antimicrobial test. These results indicate that the chitosan/cellulose blend membranes may be suitable to be used as a wound dressing with antibacterial properties.