And Fangli YuanCollege of Chemistry and Materials Engineering, Beijing Technologies and Business University, Beijing 100048, China; [email protected] State Crucial Laboratory of Multiphase Complicated Systems, Institute of Procedure Engineering, Chinese Academy of Sciences (CAS), Beijing 100190, China; [email protected] (X.L.); [email protected] (F.Y.) College of Energy Engineering, Huanghuai University, Zhumadian 463000, China Correspondence: [email protected] (Y.O.); [email protected] (L.B.)Anti-Obesity Compound Library Technical Information Citation: Ouyang, Y.; Li, X.; Tian, H.; Bai, L.; Yuan, F. A Novel Branched Al2 O3 /Silicon Rubber Composite with Improved Thermal Conductivity and Great Electrical Insulation Efficiency. Nanomaterials 2021, 11, 2654. ten.3390/ nano11102654 Academic Editor: Fabien Grasset Received: 17 September 2021 Accepted: six October 2021 Published: 9 OctoberAbstract: Within this paper, we report a thermal conductive polymer composite that consists of silicone rubber (SR) and branched Al2 O3 (B-Al2 O3). Owing towards the special two-dimensional branched structure, B-Al2 O3 particles type a continuous three-dimensional network structure by overlapping each other within the matrix, serving as a continuous heat conductive pathway. As a result, the polymer composite having a 70 wt filler achieves a maximum thermal conductivity of 1.242 Wm-1 K-1 , which can be equivalent to a considerable enhancement of 521 in comparison with that of a pure matrix. In addition, the composite maintains a higher volume resistivity of 7.94 1014 m with the loading of 70 wt , indicating that it meets the needs inside the field of electrical insulation. In addition, B-Al2 O3 fillers are properly dispersed (no substantial agglomerates) and type a sturdy interfacial adhesion with the matrix. Thus, the thermal decomposition temperature, residual mass, tensile strength, modulus and modulus of toughness of composites are drastically enhanced simultaneously. This technique supplies new insights for the 5-Azacytidine Autophagy design of high-performance polymer composites with possible application in sophisticated thermal management in contemporary electronics. Search phrases: polymer composites; thermal conductivity; Al2 O3 ; continuous network; electrical insulation1. Introduction Using the advent on the 5G era, electronic devices and equipment are establishing inside the path of miniaturization and integration [1]. Hence, the significant quantity of heat generated through the high-speed operation of electronic equipment locations higher specifications around the thermal diffusion functionality of polymer materials. Nevertheless, because of the higher disorder of molecular segments, polymers possess poor thermal conductivity (normally not higher than 0.2 Wm-1 K-1), which limits the wider application of polymer components in the field of electronic packaging [4]. In current years, the introduction of fillers with high thermal conductivity into polymer matrix to prepare polymer composites has attracted a considerable amount of consideration, and it has been confirmed that this is an effective solution to enhance the thermal conductive house of polymer matrices in academia and market [7,8]. Regular thermal conductive fillers employed to prepare higher thermal conductivity polymer composites incorporate metal fillers (Al and Cu), carbon-based components (graphene and carbon nanotubes) and ceramic fillers (AlN, BN, Al2 O3 and SiC) [91]. Unfortunately, the addition of metal fillers or carbon-based fillers tends to damage the insulation house in the material to a specific extent, even though ceramic fillers.