在0.3 M草酸与0.1 M苯胺单体组成的水溶液中,用循环伏安法(CV)在316L不锈钢(SS)表面电化学合成了导电聚苯胺(PANI)膜。用傅里叶变换红外光谱(FTIR)对聚苯胺膜进行结构分析,发现所合成的PANI为具有苯-醌交替的中间氧化态的聚苯胺,草酸阴...在0.3 M草酸与0.1 M苯胺单体组成的水溶液中,用循环伏安法(CV)在316L不锈钢(SS)表面电化学合成了导电聚苯胺(PANI)膜。用傅里叶变换红外光谱(FTIR)对聚苯胺膜进行结构分析,发现所合成的PANI为具有苯-醌交替的中间氧化态的聚苯胺,草酸阴离子作为"对阴离子"在PANI中发生了掺杂。用扫描电子显微镜(SEM)观察聚苯胺的表面形貌,发现PANI膜呈现细颗粒堆积形态。用0.2 M H2SO4水溶液模拟质子交换膜燃料电池(PEMFC)双极板的腐蚀环境,用电化学技术在0.2 M H_2SO_4中研究了PANI/316LSS复合体系的耐腐蚀性能,电化学阻抗谱(EIS)结果表明,Nyquist图呈现双容抗弧特征,不同循环周期合成的聚苯胺薄膜其耐蚀性能略有不同,循环周期为20圈时耐蚀性能最佳。展开更多
Electrospinning is a well-known process for producing submicrometer fibers, which have wide applications in many fields, especially in tissue engineering scaffolds and drug-delivery systems. This paper presents the fo...Electrospinning is a well-known process for producing submicrometer fibers, which have wide applications in many fields, especially in tissue engineering scaffolds and drug-delivery systems. This paper presents the formation of drug-loaded electrospun twin fibers. The correlations between the twin fiber formation and the polymer materials or the loaded drugs were studied by using poly(l-lactide) and poly(l-lactide-co-glycolide) as electrospinning materials, and rifampin and paclitaxel as loaded drugs. Scanning electron microscopy showed that the formation of twin fibers is significantly affected by the loaded drug but not the polymer material. A possible reason for twin fiber formation was analyzed.展开更多
文摘在0.3 M草酸与0.1 M苯胺单体组成的水溶液中,用循环伏安法(CV)在316L不锈钢(SS)表面电化学合成了导电聚苯胺(PANI)膜。用傅里叶变换红外光谱(FTIR)对聚苯胺膜进行结构分析,发现所合成的PANI为具有苯-醌交替的中间氧化态的聚苯胺,草酸阴离子作为"对阴离子"在PANI中发生了掺杂。用扫描电子显微镜(SEM)观察聚苯胺的表面形貌,发现PANI膜呈现细颗粒堆积形态。用0.2 M H2SO4水溶液模拟质子交换膜燃料电池(PEMFC)双极板的腐蚀环境,用电化学技术在0.2 M H_2SO_4中研究了PANI/316LSS复合体系的耐腐蚀性能,电化学阻抗谱(EIS)结果表明,Nyquist图呈现双容抗弧特征,不同循环周期合成的聚苯胺薄膜其耐蚀性能略有不同,循环周期为20圈时耐蚀性能最佳。
基金supported by the Education Department of Liaoning Province (LS2010154)the Director Foundation of Experimental Center, Shenyang Normal University (sy-200804)
文摘Electrospinning is a well-known process for producing submicrometer fibers, which have wide applications in many fields, especially in tissue engineering scaffolds and drug-delivery systems. This paper presents the formation of drug-loaded electrospun twin fibers. The correlations between the twin fiber formation and the polymer materials or the loaded drugs were studied by using poly(l-lactide) and poly(l-lactide-co-glycolide) as electrospinning materials, and rifampin and paclitaxel as loaded drugs. Scanning electron microscopy showed that the formation of twin fibers is significantly affected by the loaded drug but not the polymer material. A possible reason for twin fiber formation was analyzed.
