聚丁二酸丁二醇酯/虎杖提取物抗菌材料的界面作用及性能

Interface Interaction and Performance of Poly(Butylene Succinate)/Polygonum Cuspidatum Sieb. et Zucc Extracts Antibacterial Composites

对具有抗菌作用的植物虎杖进行提取,并与聚丁二酸丁二醇酯(PBS)复合制备了PBS/虎杖提取物(PBS/PCSZ)抗菌材料。采用红外光谱对复合材料进行了表征,研究了复合材料的结晶性、亲水性、热稳定性、力学性能及抗菌性能,通过分子模拟揭示了复合材料的界面作用。结果表明,虎杖提取物赋予了PBS美丽的色彩,但对PBS的晶型没有影响。其作为成核剂参与了PBS的结晶过程,且使得复合材料亲水性增强。红外光谱得出提取物与PBS发生了分子间作用,热稳定性、力学性能的变化证明了该作用的存在。分子模拟显示虎杖提取物与PBS形成C=O…H-O,增强了二者间的界面结合力。不同比例复合材料均具有良好的抗菌能力,PBS/PCSZ 9%具有强抗细菌作用。

Extracted Polygonum Cuspidatum Sieb. et Zucc with antibacterial effect,and compounded with biodegradable materials poly（ butylene succinate）（ PBS）,the PBS / PCSZ antibacterial composites were prepared. The composites were analyzed by FT-IR. The crystallinity,hydrophilicity,thermal stability,mechanical properties and antibacterial properties were studied. The interface interaction was revealed by molecular simulation. The results show that the Polygonum Cuspidatum Sieb. et Zucc extracts give the beautiful color to PBS,and almost has no impact on the crystalline of PBS. It can be used as nucleating agent in the crystallization process of PBS and makes the hydrophilic of the composites reinforced. The FT-IR spectra indicate that the extracts take place intermolecular interaction with PBS,the thermal stability and the mechanical properties change prove the existence of the effect. Molecular simulation demonstrates that the extracts and PBS form C = O…H- O,and the enhanced interfacial adhesion between them. The composites with different extracts proportions all have good antibacterial ability. The PBS / PCSZ 9% has strong anti-bacterial function.