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采用钛酸酯偶联剂表面改性水滑石,以活化指数为评价手段,研究偶联剂的用量,温度,时间等因素对改性效果的影响,并采用XRD、FTIR表征改性水滑石的结构,结果表明,钛酸酯能够有效改性水滑石。 相似文献
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碳纤维体系导电涂料的制备工艺 总被引:2,自引:0,他引:2
研制了一种以丙烯酸酯类树脂为基料的改性碳纤维体系导电涂料.用单因素方法确定改性碳纤维/树脂质量比,偶联剂的种类、用量以及添加方式、涂料的固化工艺等方面对涂料电性能的影响关系,然后用正交实验进一步优化各因素对涂膜导电性能的影响,确定了制备碳纤维体系导电涂料的最佳工艺条件为:改性碳纤维/树脂质量比为0,7,钛酸酯偶联剂TMC-102采用预处理用量为1%(wt,下同)和直接加入用量为1.5%相结合,制得的导电涂料综合性能较好;固化温度为50℃下固化20min,涂膜厚度为150μm时,其表面电阻率达到1.02Ω/sq. 相似文献
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采用钛酸酯偶联剂对CaCO3粒子进行表面处理,通过双辊熔融共混和硫化压机压片技术制备了CaCO3/PP复合材料;测试了其拉伸强度、冲击强度和硬度,探讨了偶联剂用量和CaCO3添加量对复合材料力学性能的影响.研究表明,添加CaCO3粒子能有效提高PP材料的力学性能,且经偶联剂表面处理后的CaCO3粒子对改善PP的力学性能效果更佳,当采用2%钛酸酯偶联剂表面处理后的CaCO3粒子添加量为4%时,CaCO3/PP复合材料综合力学性能最好. 相似文献
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PVDF/改性BaTiO3复合材料介电性能研究 总被引:6,自引:0,他引:6
用硅烷和钛酸酯偶联剂对BaTiO3粉进行了表面处理,使用溶剂法制备了PVDF/BaTiO3复合薄膜,通过疏水亲油实验定性地分析了硅烷和钛酸酯偶联剂对BaTiO3粉的偶联作用可以改善PVDF/BaTiO3的界面结合,通过测定PVDF/BaTiO3的介电常数和介电损耗角正切值表征了复合材料的介电性能,PVDF/BaTiO3扫描电子显微镜(SEM)的微观形态分析发现,经过偶联剂表面处理,BaTiO3粉在PVDF中的分散情况改善,偶联剂的用量对微观形态影响较大。 相似文献
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铜系复合涂料导电稳定性的研究 总被引:15,自引:1,他引:14
本文研究了硅烷偶联剂对电磁屏蔽用铜系导电复合涂料导电稳定性的影响,结果表明,由于偶联剂在铜粉表面可形成隔绝空气的保护膜,导电涂料的导电性能及导电稳定性均得到显著的提高,当偶联剂的含量为铜粉含量的3%(质量分数)时达到最佳值。 相似文献
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金属导电短纤维提高Ni涂层导电性能研究 总被引:1,自引:0,他引:1
探索了金属导电短纤维提高电磁波屏蔽用Ni涂层导电性能的机制。结果表明,金属导电短纤维能大幅度地提高Ni涂层的导电性能,经分析是由于增大涂层中导电网络的密度所致。还对复合型涂层的屏蔽效能进行了理论预测。 相似文献
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Shivakumar Geetha Konda Kannan Satheesh Kumar Subbian Meenakshi Muthana Thevar Vijayan Dinesh Chandra Trivedi 《Composites Science and Technology》2010
The use of fibril materials as substrate for reinforcing polymers has wide industrial applications. In this article, we discuss polyaniline and polypyrrole as conducting polymers to provide electronic conductivity in E-glass fabric reinforced conducting composite with varied degree of composition and conductivity using industrially important polymers polymethylmethacrylate and polyvinyl chloride as a host matrix. Aromatic sulphonic acids such as PXSA, OXSA, PSA, PDSA, RDSA, OCPSA and MCSA were used as a dopant. The influence of the aromatic ring substituents in these dopants over the conductivity and processibility due to various interactions has been studied. The study shows that due to bulk nature of conductivity, shielding effectiveness (SE) increases with increase in conductivity and thickness of a composite. The test samples were characterized by conductivity and electromagnetic shielding effectiveness (EMI SE). The electromagnetic shielding effectiveness was measured by co-axial transmission line method in the frequency range of 0.01–1000 MHz. These composites with both side shielded by polypyrrole offered a uniform shielding effectiveness of 69 dB. 相似文献
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首先介绍电磁屏蔽材料的屏蔽方式和电磁屏蔽原理,然后,对目前常用的各种电磁屏蔽填料的功能特点和应用情况进行了分析,在此基础上,对电磁屏蔽涂料的制备方法、电磁屏蔽涂料的导电机理以及影响电磁屏蔽性能的因素进行了综合分析,对电磁屏蔽涂料的应用发展方向进行了展望。 相似文献
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Novel carbon nanotube-polystyrene foam composites for electromagnetic interference shielding 总被引:2,自引:0,他引:2
A novel carbon nanotube-polystyrene foam composite has been fabricated successfully. The electromagnetic interference (EMI) shielding effectiveness measurements indicated that such foam composites can be used as very effective, lightweight shielding materials. The correlation between the shielding effectiveness and electrical conductivity and the EMI shielding mechanism of such foam composites are also discussed. 相似文献
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《材料科学技术学报》2019,35(6):1074-1080
Microstructure, electrical conductivity, and electromagnetic interference (EMI) shielding effectiveness (SE) of cast Mg-xZn-yY (x = 2–5, y = 1–10) alloys were systematically investigated to understand the effects of Zn and Y additions on electrical conductivity and electromagnetic shielding effectiveness of the alloys. Experimental results indicate that the electrical conductivity and SE of the Mg-xZn-yY alloys decrease with Y/Zn ratio. Electrical conductivity is the main factor that affects the electromagnetic shielding properties and the variation tendency of electromagnetic shielding properties of the Mg-xZn-yY alloys is consistent with conductivity. Valence of Y and Zn atoms, configuration of extranuclear electron and volumetric difference are main reasons for the variations in the electrical conductivity. A high density of second phase and the formation of semi-continuous network structure can also improve the SE value at high frequencies. 相似文献