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聚氨酯乳液/纳米石墨微片复合导电涂料的制备及其电磁屏蔽性能 总被引:3,自引:0,他引:3
以纳米石墨微片为导电填料,聚氨酯乳液为基体,制备水性导电复合涂料,研究其导电性能和电磁屏蔽性能。结果表明,质量分数为35wt%纳米石墨微片,粘度区间160~180MPa·s,质量分数为2%的OP-10分散剂为最佳配方,最佳施工工艺为超声波分散30min后喷涂,涂层厚度控制在80um左右,在65℃的条件下固化。通过该法制备得到的导电涂料,其涂层表面电阻率降低至7.5Ω·cm^-2,平均的电磁屏蔽效能在27dB左右(300kHz~1.5GHz)。 相似文献
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吴秀珍李宏 《电子材料与电子技术》2008,(2):23-27
本文主要讨论了表层导电型屏蔽材料,总结了当前国内外导电涂料和金属敷层屏蔽材料的研究现状和进展,展望了其发展趋势,为解决敏感设备的电磁屏蔽(EMS)问题和进一步研究开发表层导电型屏蔽材料提供参考。 相似文献
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PAn/Ni电磁屏蔽复合材料的研究 总被引:7,自引:1,他引:6
聚苯胺作为一种新型导电高分子材料,由于其质轻、环境稳定性好等特点,有应用于电磁屏蔽领域的巨大潜力.对一种先进的电磁屏蔽复合材料--导电聚苯胺PAn/Ni电磁屏蔽涂料进行研究,将高分子材料与金属粉末作为复合导电填料应用于涂料,并研制出在30~1000 MHz内屏蔽效能达60 dB的屏蔽涂料.通过对不同的组分和比例所得涂料的屏蔽效能测试,发现PAn与Ni粉之间在涂料中有复合效应存在. 相似文献
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介绍了金属丝编织防波套、金属复合带、半导电高分子材料、电化学镀屏蔽膜和导电涂料等电缆屏蔽材料的组成、结构、制造工艺、特点、应用及发展现状,有助于电缆制造厂商和用户根据实际工作条件,合理选择屏蔽材料及制造方法。 相似文献
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基于电子标签天线对导电性要求较高的特性,实验以自制Ag作为导电填料。论文采用液相化学还原法,以次磷酸钠为还原剂,还原硝酸银制备纳米银胶。通过控制反应条件(温度、pH值等)、反应物的量(六偏磷酸钠、PVP),制备出粒径分布均匀、分散稳定性优良的纳米银胶。通过向银胶中添加电解质,析出纳米银粉,加上适量的助剂、溶剂和分散剂,制备了水性丙烯酸树脂和水性聚氨酯基导电油墨。分析了影响油墨导电性能的各影响因素。 相似文献
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水性石墨导电涂料性能研究 总被引:2,自引:0,他引:2
研制了以石墨为导电填料,苯丙乳液为基料的水性涂料。分析了石墨、水的用量、固化温度与体积电阻率的关系以及涂层电阻与温度的关系。结果表明:w(石墨)在14%~20%,w(水)在55%~65%,固化温度为70℃时,涂料的导电性能最好,ρv约为0.25Ω·cm。涂料的阻温特性表现为在升温过程中先出现PTC效应,然后出现NTC效应。 相似文献
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以一种新型镀Ni-Cu-La-B玻璃纤维与片状镍粉为复合填料,以丙烯酸树脂作为粘结剂,研制出了一种新型镀Ni-Cu-La-B玻璃纤维/片状镍粉/丙烯酸树脂电磁波屏蔽复合涂料,并研究了其导电性能和电磁波屏蔽性能。结果表明,添加6 wt%的镀Ni-Cu-La-B玻璃纤维能显著改善涂层的电磁性能,膜厚300μm,涂层电阻率为0.68Ω·cm,涂层屏蔽效能在0.3~1 000 MHz频段内为47.78~64.28 dB。为研制低成本电磁波屏蔽涂料提供了一种新的思路和方法。 相似文献
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K. Lee P. Henry Simon Fleming J.L. Blows 《Photonics Technology Letters, IEEE》2006,18(8):914-916
One hundred twenty meters of fiber with an internal codrawn wire and electrically conductive coating was successfully fabricated for the first time. The integration of the conductive coating and wire was all performed during the fiber draw stage, in a process that enabled arbitrarily long lengths of fiber to be made. The wire combined with the conductive coating enables a strong electric field to be formed across the optical core. Such a fiber is ideal for thermally poling long lengths and for nonlinear device applications such as optical switches and modulators. 相似文献
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Pietro Cataldi Pietro Steiner Mufeng Liu Gergo Pinter Athanassia Athanassiou Coskun Kocabas Ian A. Kinloch Mark A. Bissett 《Advanced functional materials》2023,33(30):2301542
A green textile-based conductor with controllable electrical resistance change with deformation and transiency (i.e., dissolution in water) will be the holy grail in wearable electronics since it can satisfy divergent needs with a single solution and be sustainable simultaneously. Nevertheless, designing such material is challenging since opposite requirements shall be satisfied. To solve such a problem, cotton is functionalized using conductive inks made of graphene or carbon nanofiber, a biodegradable polyvinyl alcohol binder, and environmentally friendly solvents. The electrical resistance shows an anisotropic response to bending depending on the composition of the coating and the stress direction, functioning either as a deformable compliant electrode or a tunable piezoresistor. Indeed, it can withstand thousands of bending cycles with a change in resistance of less than 5% or change its resistance by many orders of magnitude with the same deformation thanks to the combination of cotton twill and different nanofillers. A simple modification in the binder composition adding waterborne polyurethane allows the coating to go from entirely transient in water within minutes to withstanding simulated washing cycles for hours without losing its electrical conductivity. This green versatile conductor may serve opposing needs by altering the material composition and the deformation direction. 相似文献
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研究了不同厚度ITO膜的大尺寸超薄导电玻璃的翘曲度,ITO膜形成期间基片温度对ITO膜层晶体化程度的影响及不同基片温度下形成的ITO膜层在不同的退火条件下的退火前、后的电阻率和膜压应力.实验发现,ITO膜层的很高的压应力是导致导电膜玻璃翘曲的直接原因;采用室温沉积非晶ITO膜,然后经高温热退火可获得低膜压应力多晶相ITO膜.基于实验结论,提出了一种适合批量生产的低翘曲度ITO膜导电玻璃的制备工艺. 相似文献