Joseph Angel Mary, Nagendra Baku, Surendran K P, Gowd E Bhoje
Materials Science and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019 , Kerala , India.
Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201 002 , India.
Langmuir. 2019 Apr 2;35(13):4672-4681. doi: 10.1021/acs.langmuir.9b00028. Epub 2019 Mar 18.
Incorporation of multifunctional inorganic additives into the commercial polymers still stands as the most captivating and effective way to realize new-generation electronic components. Here, we introduce a simple, cost-effective, and environmentally benign method to covalently functionalize graphene oxide (GO) with vinyl- and aminopropyl-functionalized hybrid silica spheres with a polyhedral oligomeric silsesquioxane (POSS)-siloxane composition. The reaction has been carried out in a mixture of ethanol and water (used as a medium) at ambient conditions with silane precursors. Later, the synthesized hybrid material has been tested for its dielectric properties after blending with syndiotactic polystyrene, a commercially available insulating semicrystalline polymer. It was observed that the dielectric constant decreases with the addition of GOPOSS up to 1.85 with a dielectric loss of 0.02 at 5 GHz. Significant improvements in the thermal properties of the composites were verified with minimal filler loading.
将多功能无机添加剂引入商用聚合物仍然是实现新一代电子元件最具吸引力和最有效的方法。在此，我们介绍一种简单、经济高效且环境友好的方法，用具有多面体低聚倍半硅氧烷（POSS）-硅氧烷组成的乙烯基和氨丙基功能化杂化二氧化硅球对氧化石墨烯（GO）进行共价功能化。该反应在乙醇和水的混合物（用作介质）中，于环境条件下与硅烷前驱体进行。随后，将合成的杂化材料与间规聚苯乙烯（一种市售的绝缘半结晶聚合物）共混后，测试其介电性能。观察到，随着GOPOSS的添加，介电常数降低，在5 GHz时介电常数降至1.85，介电损耗为0.02。在填料负载量极低的情况下，复合材料的热性能得到了显著改善。
