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《中国化学》2017,35(7):1157-1164
In this work, multifunctional sulfonated polystyrene/polyaniline/silver (SPS /PANI /Ag) nanocomposites are prepared through using sulfonated polystyrene (SPS ) spheres as templates and utilizing polyvinylpyrrolidone (PVP ) as reducing agent and stabilizing agent. Our method is an environmentally friendly method because no toxic reagents are added during the preparation process. Fourier transform infrared spectrum (FTIR ), field emission scanning electron microscopy (FESEM ), and energy disperse spectroscopy (EDX ) results confirmed the formation of PS spheres, SPS spheres, SPS /PANI nanocomposites, and SPS /PANI /Ag nanocomposites. Powder X‐ray diffraction (XRD ) patterns indicate that the obtained Ag nanoparticles are crystalline. Solubilities measurements show that SPS /PANI /Ag nanocomposites have improved solubilities when compared to pure PANI in common organic solvents and deionized water. Antibacterial studies show that SPS /PANI /Ag nanocomposites can greatly inhibit the growth of Escherichia coli and Staphylococcus aureus . Anticorrosion studies show that the incorporation of SPS /PANI /Ag nanocomposites in waterborne alkyd resin can greatly promote the anticorrosive efficiency of waterborne alkyd resin. 相似文献
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Mg-based hydrogen storage alloys MgNi, Mg0.9Ti0.1Ni and Mg0.9Ti0.1Ni0.9Co0.1 were successfully prepared by means of mechanical alloying (MA). The structure and the electrochemical characteristics of these Mg-based materials were also studied. The results of X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that the main phases of the alloys exhibit amorphous structures, and trace of Ni co-exists. The charge-discharge cycle tests indicate these alloys have good electrochemical active characteristics. And the cycle stability of Ti and Co doped alloy was better than that of MgNi alloy. After 50 cycle charge-discharge, the discharge capacity of the Mg0.9Ti0.1Ni0.9Co0.1 alloy was much better than that of MgNi and Mg0.9Ti0.1Ni alloys. The discharge capacity of Mg0.9Ti0.1Ni0.9Co0.1 was 102.8% higher than that of MgNi alloy, and 45.49% higher than that of the Mg0.9Ti0.1Ni alloy. During the process of charge-discharge cycle test, the main reason for the electrode capacity fading is the corrosion of Mg to Mg(OH)2 on the surface of alloys. The Tafel polarization test indicates Ti and Co improve the anticorrosion in an alkaline solution. The EIS results suggest that proper amount of Ti and Co doping improve the electrochemical catalytical activity on the Mg-based alloy surface significantly. 相似文献
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通过测试极化曲线和浸泡腐蚀实验,对比分析了最佳沉积工艺下制备的TiCxN1-x涂层铝箔与腐蚀化成法制备的铝箔的耐蚀性能。结果表明,在酸性腐蚀溶液中,TiCxN1-x涂层铝箔的自腐蚀电位Ecorr比腐蚀化成铝箔高50mV,而电流密度低0.914×10-3A/cm2,说明TiCxN1-x涂层铝箔的耐腐蚀性能明显优于腐蚀铝箔,同样,在浸泡9h后腐蚀铝箔样片已出现腐蚀贯穿,而TiCxN1-x涂层铝箔没有明显变化。 相似文献
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农话端局接地网的不规范,降低了农话通信的可靠性。农话地线网的结构可以是联合接地方式,在现有建筑物接地电阻值较大时可另设一组辅助联合接地网。接地网的防腐处理往往被忽视,这也是接地不可靠的重要原因。预先做好防腐处理,可以延长接地网使用年限。接地体和引入线材料以及直流工作地线线径的选择也至关重要接地系统中交流中线的处理也不可小视。总之,接地系统也需要用心维护,完备的原始记录使维护工作得心应手。 相似文献
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导电聚合物作为一种新型高分子材料,由于具有可逆的氧化还原特性,在金属腐蚀防护领域具有潜在的应用前景。在众多的导电聚合物中,聚苯胺因其具有独特的抗点蚀、抗划伤和防止海洋生物附着等特殊性能,被广泛应用于金属材料、化学工业和航海航天等领域, 逐渐成为防腐涂料领域的研究热点。本文通过对单一聚苯胺涂层防腐性能不足的分析,系统总结了近年来改性聚苯胺涂层在金属腐蚀防护领域的研究进展,包括单一环取代聚苯胺涂层和N取代聚苯胺涂层、改性聚苯胺复合涂层和改性聚苯胺复合材料/树脂共混复合涂层;通过各种腐蚀测试手段比较了改性聚苯胺涂层与未改性聚苯胺涂层之间防腐性能的优劣,进一步证明了供电子取代基(如烷基、烷氧基和氨基等)能够提高聚苯胺涂层的防腐性能,复合改性或与树脂共混也能够提高聚苯胺及其衍生物涂层的防腐性能;同时展望了聚苯胺及其衍生物涂料未来发展的新趋势。 相似文献
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Hanlin Zhou Xuelian Wei Baocheng Wang Enyang Zhang Zhiyi Wu Zhong Lin Wang 《Advanced functional materials》2023,33(7):2210920
Energy shortage and environmental degradation are two important challenges facing humanity. Here, a multi-layer stacked triboelectric nanogenerator (MLS-TENG) based on a rotation-to-translation mechanism is reported for fluid energy harvesting and environmental protection. The mechanism transforms fluid-induced rotation into a reciprocal translation of the MLS-TENG, enabling the conversion of fluid energy into electrical energy. In addition, benefiting from a multi-layer stacked structural design, the open-circuit voltage is increased from 860 to 2410 V and an efficient energy harvesting rate of 2 mJ min−1 is obtained in an actual river. Furthermore, with the assistance of the MLS-TENG, a self-powered wireless temperature and humidity monitoring system and a metal anticorrosion system are successfully established. Ambient monitoring data can be transmitted continuously at an interval of 49.7 s, and the corrosion rate of steel is significantly slowed down. This study provides guidance for efficient harvesting of ambient fluid energy, with promising applications in environmental monitoring and protection. 相似文献
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