采用静电纺丝法在乳液聚合条件下制备了聚乳酸(PLA)基负载有机改性膨润土[O-MMT-P(2,3-DMA)]吸附有金属离子的抗菌材料,分别为:Ag+/O-MMT-P(2,3-DMA)负载PLA、Ni2+/O-MMT-P(2,3-DMA)负载PLA、Ag+/Ni2+/O-MMT-P(2,3-DMA)负载PLA这3种抗菌材料,并通过X射线衍射(XRD)、红外光谱(FT-IR)、热重(TG)和扫描电镜(SEM)等手段表征了所制抗菌材料的结构与组成。结果表明:通过乳液聚合法成功合成了O-MMT-P(2,3-DMA);改性有机物已经插入膨润土层间,聚合反应未曾改变有机改性膨润土的化学组成与层间结构;抗菌功能填料最佳量为0.5%。Ag+/Ni2+/O-MMT-P(2,3-DMA)负载PLA抗菌材料对大肠杆菌以及金黄色葡萄球菌的抗菌率达到了92.9%和92.2%,Ni2+/O-MMT-P(2,3-DMA)负载PLA抗菌材料对大肠杆菌和金黄色葡萄球菌的抗菌率为21.9%和23.6%,Ag+/O-MMT-P(2,3-DMA)负载PLA抗菌材料对大肠杆菌以及金黄色葡萄球菌的抗菌率达77.7%和73.7%。
An antibacterial material containing polylactic acid(PLA)-based organically modified bentonite (O-MMT-P(2,3-DMA) adsorbed with metal ions was prepared by electrospinning method under emulsion polymerization condition.The three kinds of antibacterial materials were Ag+/O-MMT-P(2,3-DMA) load PLA,Ni2+/O-MMT-P(2,3-DMA) load PLA,Ag+/Ni2+/O-MMT-P(2,3-DMA) Load PLA respectively.The structure and composition of the materials were characterized by X-ray diffraction (XRD),infrared spectroscopy (FT-IR),thermogravimetry (TG) and scanning electron microscopy (SEM).The results shown that:O-MMT-P(2,3-DMA) was successfully synthesized by emulsion polymerization.The modified organic matter was inserted between the layers of bentonite,and the polymerization reaction was not changed the chemical composition and interlayer structure of the organic modified bentonite.The optimal amount of filler was 0.5%.The antibacterial rate of Ag+/Ni2+/O-MMT-P(2,3-DMA) loaded PLA against Escherichia coli and Staphylococcus aureus reached 92.9% and 92.2%,the antibacterial rate of Ni2+/O-MMT-P (2,3-DMA) loaded PLA on E.coli and Staphylococcus aureus was 21.9% and 23.6%,the antibacterial rate of Ag+/O-MMT-P(2,3-DMA) loaded PLA on E.coli and Staphylococcus aureus reached 77.7% and 73.7% respectively.
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