Abstract

Common organic coatings are hardly conductive and seldom applied in electromagnetic shielding fields. Thereby, the thermoplastic conductive nanocomposites, waterborne silicon-acrylic emulsion (SAE) merged with multi-walled carbon nanotubes (MWCNTs) and silica sols (Si), were prepared via co-blending method. Compared with neat SAE, the conductivity of composite latex (5 wt.% MWCNT and 1.5 wt.% Si) was raised nearly seven orders of magnitude, and the tensile strength and Young’s modulus were enhanced to 366% and 177%, respectively. The contact angle was raised from 59° to 84°. The curing temperature was decreased by 12.8 °C. These enhancements proved that the addition of MWCNTs and silica sol could boost the electrical, mechanical, curing, heatproof and waterproof performances of SAE, which will be employed in high-property conductive paint areas, including the flexible and stretchable devices.

摘要

普通的有机涂层几乎不导电，很少用于电磁屏蔽领域。从而，通过共混法制备了热塑性导电纳米复合材料，与多壁碳纳米管（MWCNTs）和硅溶胶（Si）混合的水性硅丙烯酸乳液（SAE）。与纯SAE相比，复合胶乳（5 wt。％MWCNT和1.5 wt。％Si）的电导率提高了将近七个数量级，并且抗张强度和杨氏模量分别提高到了366％和177％。接触角从59°增大到84°。固化温度降低了12.8°C。这些改进证明，添加MWCNT和硅溶胶可以提高SAE的电气，机械，固化，耐热和防水性能，这些SAE将用于高性能导电涂料领域，