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共混复合型导电高分子材料研究进展 总被引:1,自引:0,他引:1
介绍了复合型导电高分子材料的概念及特点,重点讨论了共混复合型导电高分子材料的制备方法和影响共混复合型导电高分子材料导电性的主要因素。并对当前共混复合型导电高分子材料的应用及发展趋势作了简要介绍。 相似文献
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《聚氨酯工业》编辑部整理 《聚氨酯工业》2015,(1)
<正>纳米二氧化硅诱导聚氨酯弹性体结晶行为的研究/于深,张荣纯,孙平川(南开大学功能高分子材料教育部重点实验室,南开大学化学学院,南开大学物理学院)∥高分子学报.-2014(1):72-79聚氨酯耐热性能研究进展/高宁,刘微,李风,等(西南交通大学地球科学与环境工程学院,公安部四川消防研究所)∥塑料科技.-2014,42(5):123-127自限温聚氨酯注浆加固材料的自限温机理及应用性能/杨绍 相似文献
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《中国耐火材料》2012,(2)
The magnesia composite materials were prepared using fused magnesia,used magnesia chrome bricks, magnesium aluminate spinel, alumina powder and chrome oxide powder as starting materials. In order to improve the performance of magnesia composite material,the influence of chrome oxide concentrate powder on the properties of magnesia composite material was researched. The apparent porosity,bulk density,cold crushing strength,linear expansion and thermal shock resistance of the specimens were determined. The results show that adding chrome oxide concentrate promotes the formation of the composite phases of three kinds of spinel,which is beneficial to the thermal shock resistance. The magnesia chrome spinel can not be formed at high temperatures theoretically,but can dissolve in the magnesia composite material. Comprehensively,the optimal addition of chrome oxide concentrate is 10. 0 mass% for the magnesia composite materials. 相似文献
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Fuel consumption and cold start characteristics of a production vehicle fuelled with blends of N. 2 diesel oil (500 ppm sulfur content), soybean biodiesel (3%, 5%, 10%, and 20%) and hydrous ethanol (2% and 5%) were compared. A wagon-type vehicle equipped with a four-cylinder, 1.3-l, 63 kW diesel engine was tested in a cold chamber at the temperature of −5 °C for the cold start tests. Fuel consumption tests were performed following the 1975 US Federal Test Procedure (FTP-75). The results showed that the cold start time was satisfactory for all fuel blends tested, but it was longer for the blend containing 20% of soybean biodiesel (B20) in comparison with the blends with lower biodiesel concentration. The cold start time also increased with increasing with increasing ethanol content in the fuel blend. Specific fuel consumption was not affected by increasing biodiesel concentration in the blend or by the use of 2% of ethanol as an additive. However, the use of 5% of ethanol concentration in the B20 blend resulted in increased specific fuel consumption. 相似文献
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C5石油树脂改性作为柴油流动改进剂 总被引:10,自引:0,他引:10
利用分子结构设计原理,对C5石油树脂进行改性制备柴油流动改进剂,考察了马来酸酐、引发剂、高碳醇用量、反应时间、温度及EVA树脂的规格对柴油冷滤点的影响。结果表明,经改性的C5石油树脂对降低长庆油田0^#柴油的冷滤点相当有效。 相似文献
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通过分析未来排放法规趋势对后处理系统的影响,得到SCRF系统在低温或冷启动条件下De-NOx具有的较大优势,将在应对国六b(“国家第六阶段机动车污染物排放标准”)及以上法规发挥重要作用;阐述了SCRF常用几种载体的特征与适用性,指出对载体材质和参数选取需要考虑的因素,认为高空隙的碳化硅、莫来石以及泡沫合金材质的载体具有广泛的应用前景;综述了V/Cu/Fe-SCRF以及分层与混涂涂层技术的研究现状以及各自的特性,得出Cu基分子筛仍是作为SCRF催化剂的首选涂层材料,尤其是Cu-LTA经过老化后,在高温下仍表现出优异的NOx转化性能;介绍了SCRF建模与仿真的方法及意义,得出SCRF仿真可以较好地用于实际应用的模拟。 相似文献
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柴油低温流动改进剂的研究 总被引:1,自引:0,他引:1
介绍了一种新研制的复配型柴油低温流动改进剂,并与公司目前使用的TS型低温流动改进剂进行了比较。结果表明,复配型柴油低温流动改进剂对不同批次、不同组成的柴油具有较好的感受性,当加剂量为400mg/kg,柴油冷滤点的降低值都在10个单位以上,好于目前使用的TS改进剂。同时考察了改进剂对柴油质量的影响,用复配剂由0^#柴油调成的-10^#柴油产品完全符合轻柴油的质量指标。 相似文献
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Electrical conductivity and self-temperature-control heating properties of carbon nanotubes filled polyethylene films 总被引:2,自引:0,他引:2
Electrical properties of polyethylene and carbon nanotube composite films were investigated, when the composite films were set in heating box or under electric field at constant voltage. The composite films were prepared by gelation/crystallization from dilute solution. The mixture of ultra-high molecular weight polyethylene (UHMWPE) and branched low molecular weight polyethylene (LMWPE) was used as matrix, and multi-walled carbon nanotubes (MWNTs) were used as fillers. The filler content was chosen to be 10 wt% (ca. 5.25 vol%) which is a relatively higher loading than the percolation threshold to ensure to act as heating element in plane heater of composite film. The focus was concentrated on the temperature dependences of electric conductivity by external heating and by exothermic effect concerning self-temperature-control heating properties which were measured for the three kinds of UHMWPE-LMWPE composites with the same content of MWNTs in the composites. When a certain voltage was applied to the composite, the surface temperature of film reaches the equilibrium value within less than 100 s. The maximum surface temperature as the equilibrium state of the resultant composite film can be easily controlled by adjusting the composite ratio represented as UHMWPE/LMWPE. The high efficiency of heating and wide adjustability of stable temperature suggested its good application in high efficient plane heater. 相似文献