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导电填料在环氧导静电涂料中的应用探讨 总被引:1,自引:0,他引:1
以环氧树脂作为主要成膜物质,配合聚酰胺加成物类固化剂制备出一种具有良好的导电性能和优异的防腐蚀性能的双组分浅色导静电油罐内壁涂料,详细探讨了导电填料种类及加入量对导电涂料导电性能的影响。结果表明,导电粉加入量为14%(质量分数)时涂膜的表面电阻率可达到最低值;体系PVC为33%、颜基比为1.4时,涂膜具有最佳的物理机械性能以及化学性能。 相似文献
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耐高温防腐蚀导电涂料的研制 总被引:4,自引:1,他引:3
采用醇酸树脂为基料,石墨和炭黑为复合导电填料,以及溶剂和助剂,研制成耐高温防腐蚀导电涂料。该涂料既耐高温(200 ~300 ℃) ,耐各种腐蚀介质,又导电( 表面电阻率< 10 Ω) 。介绍了该涂料的配制和性能指标。讨论了导电填料、石墨和溶剂用量对涂料性能的影响。 相似文献
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采用E-51型环氧树脂做基体,甲基纳迪克酸酐做固化剂,1~3μm片状银粉做导电填料,2-乙基-4甲基咪唑做促进剂,按照一定的质量配比,采用混合工艺制备出了一款电学性能、力学性能、耐高温性能都很好的绿色环保型导电银胶。经过性能测试,该产品的体积电阻率为72 mΩ·m,剪切强度为16.1 MPa,满足集成电路封装使用。 相似文献
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鳞片石墨基复合导电填料的制备与应用 总被引:1,自引:0,他引:1
介绍了以葡萄糖和酒石酸作为还原体系,采用化学镀技术制备鳞片石墨基复合导电填料的生产工艺。着重讨论了鳞片石墨表面预处理、反应温度、镀覆量等因素对鳞片石墨基复合导电填料电导率的影响。当反应温度为60℃,银镀覆量为25%时,在经NaOH、HNO3和表面活性剂处理后的鳞片石墨表面通过化学镀工艺获得了均匀分散的银,其平均粒径约为500 nm,该鳞片石墨基复合导电填料的电导率为9.114 4 S.cm-1;并用该导电填料制得了玻璃鳞片导电涂料,其体积电阻率为252.75Ω.cm,而耐蚀性与玻璃鳞片涂料相比,不仅没有下降,还略有增强。 相似文献
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在铜粉表面进行化学镀银,获得银铜导电粉。把镀银铜粉与1%的TiFeCoNi纳米合金粉混合,制成复合导电填料。用环氧树脂、复合导电填料和固化剂混合制成导电胶粘剂。对导电胶的性能进行了测试。结果表明,当导电填料占导电胶重量比的70%时,导电率可达0.005Ω·cm。最佳的固化条件是130℃、保温3 h。把导电胶放在85℃条件下保温600 h,导电胶的电阻率和剪切强度变化量不超过20%。导电胶的电阻随使用温度的变化类似于金属电阻的变化规律。 相似文献
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塑料件用水性导电涂料的研制 总被引:2,自引:0,他引:2
以水溶性丙烯酸树脂为基料、银包铜粉为导电填料,制备了一种水性导电涂料,并对其理化性能参数进行了测试。讨论了导电填料、水加入量、分散剂以及固化温度、涂膜厚度等对导电涂料性能的影响,确定了最佳的水性导电涂料组成和工艺条件:树脂用量22%、银包铜粉用量35%~44%、溶剂水的添加量28%-40%、分散剂用量0.62%左右、固化温度55℃。 相似文献
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以E44环氧树脂为基料,添加适当的无机填料和T31固化剂,制备环氧树脂隔热涂料。考查了填料量、固化剂用量等参数对涂料性能的影响,探索了固化过程的热特性,确定了涂料的组成与制备的工艺参数。综合比较,填料量为50%,固化剂用量为20%时可获得最佳工艺操作条件及最佳性能的涂料。涂料在常温下的初始黏度为334 Pa·s,在30℃下的凝胶时间为30 min,固化时间为3.5 h。该涂料的导热系数为0.095 W/(m·K),玻璃化转变温度为148℃,固化线收缩率为1.332%,剥离力为403.23 kN/m2,与企业现有的聚酰胺涂料相比,该涂料具有更优异的性能。 相似文献
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碳纳米管填料静电自组装制备及在导电塑料中的应用 总被引:1,自引:0,他引:1
为了提高碳纳米管(CNTs)在塑料中的分散性能,设计碳纳米管填料(CNTs Filler)。阳/非离子表面活性剂复配在水中分散CNTs,并赋予CNTs表面正电性。与表面负电性的炭黑或聚苯乙烯微球复合,通过静电吸附作用自组装形成均匀稳定的复合物,制备出CNTs Filler。对比了CNTs Filler、CNTs和炭黑在PS和ABS塑料中,经不同成型工艺的导电结果,证明了使用碳纳米管填料提高了碳纳米管在塑料中的分散性能,总结了碳纳米管相对炭黑作为塑料导电功能体适合压延成型加工。推荐碳纳米管用于导电片材、导电薄膜和高导电塑料等领域。 相似文献
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以无酸丙烯酸酯系压敏胶为导电胶基体,苯二亚甲基二异氰酸酯(XDI)为交联剂,镍/银混合粉体为导电填料,制备了铜箔导电胶带。讨论了导电粒子的种类及其添加量、交联剂的用量、老化存放时间等对导电胶带的粘接性能、导电性能及电磁屏蔽性能的影响。结果表明,当镍银混合粉添加15%,交联剂用量25%,干胶厚度45μm时,制备的胶带综合性能良好。其粘接强度大于19N/25mm,体积电阻率为6×10^-3Ω·cm,电磁屏蔽效能大于90dB(频率从30-1500MHz),且耐高温性能稳定。 相似文献
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Epoxy adhesives filled with four different volume fractions of eutectic tin-bismuth solder alloy were prepared and the effect of filler content on the electrical and mechanical properties of these anisotropic electrically conductive adhesives was investigated. The results show that the adhesive containing the lowest amount of the filler alloy had the best combination of conductivity, insulation resistance and shear strength. The DSC-measurements suggested that the filler melts before the cure of the resin begins which allows the filler to wet and bond well to the conductors. This was verified by SEM/EPMA examinations. A temperature cycling test and high humidity, high temperature treatment were conducted on the best composite adhesive. The temperature variation had no effect on conductivity of the joints while humid and hot environment decreased the conductivity. 相似文献
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Epoxy adhesives filled with four different volume fractions of eutectic tin-bismuth solder alloy were prepared and the effect of filler content on the electrical and mechanical properties of these anisotropic electrically conductive adhesives was investigated. The results show that the adhesive containing the lowest amount of the filler alloy had the best combination of conductivity, insulation resistance and shear strength. The DSC-measurements suggested that the filler melts before the cure of the resin begins which allows the filler to wet and bond well to the conductors. This was verified by SEM/EPMA examinations. A temperature cycling test and high humidity, high temperature treatment were conducted on the best composite adhesive. The temperature variation had no effect on conductivity of the joints while humid and hot environment decreased the conductivity. 相似文献
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Yanbin Wang Qingning Kong Huang Yu Zhonglin Luo Biaobing Wang 《Polymer-Plastics Technology and Engineering》2021,60(2):195-207
ABSTRACT Flexible conductive polymer composites with good mechanical property play an important role in the modern electronic industry. In this study, aromatic poly(amide-imide) (PAI) and thermoplastic polyurethane (TPU), functionalized multi-wall carbon nanotube (FMWCNT) and reduced graphene oxide (RGO), were, respectively, used as polymer matrix and conductive filler to fabricate conductive polymer composites. Combing the advantages of PAI (high strength) and TPU (good elasticity), PAI-TPU/FMWCNT-RGO polymer composites exhibited a high tensile strength of 58.8 MPa and good elongation at break of 255%. On the other hand, the hybrid conductive filler of FMWCNT-RGO possessed a 3D structure, which is beneficial for improving conductive property, and thus a relative high conductivity of 35.9 S m?1 was achieved. The enhanced mechanical and conductive properties are mainly ascribed from the good compatibility between the polymer matrix and conductive fillers, which promotes the good dispersion of conductive filler into the polymer matrixes. 相似文献
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导电填料对粉末涂料导电性能的影响 总被引:1,自引:0,他引:1
研究了使用三类不同导电填料制得的粉末涂料的表面电阻与导电填料含量的关系,确定了粉末涂料中各类导电填料的渗滤阔值。用扫描电镜(SEM)观察了不同导电填料含量的粉末涂料的断面形貌,用透射电镜(TEM)观察分析了炭黑及导电二氧化钛的结构及粒径。结果表明,填料不同,得到的粉末涂料的渗滤阈值有很大差别。对于炭黑或导电二氧化钛,其结构性越高,比表面积越大,粒径越小,导电性能越好,得到的渗滤阈值越低。 相似文献