Polymer insulation achieved at a low thermal conductivity filler reinforcing efficiency
December 19, Professor Jiang Ping opened Shanghai Jiaotong University team published an article \”Cellulose Nanofiber Supported 3D Interconnected BN Nanosheets for Epoxy Nanocomposites with Ultrahigh Thermal Management Capability\” in the international journal famous material \”Advanced Functional Materials\”, reported the ultra-thin nitrogen team use the method of nanosheets boron (BNNS) constructing a three-dimensional structure of the airgel thermally conductive, successful and efficient reinforced polymer insulation thermal conductivity results in low filling. The team has been pushing basic research thermal insulation materials, this is the second time since 2013 in the \”Advanced Functional Materials\” published in the field of thermal insulation, this achievement also marks in marking its thermal conductivity insulating polymer materials research has made important progress. The importance of the insulating material and the insulating material for power electronics equipment substantially integral part determines the skill level of the electrical equipment and electronic devices considerably. Current problems Currently, electrical equipment and electronics toward integrated, high power of the other direction, its operation, the work process will generate a lot of heat, if the heat can not be efficiently delivered it will seriously affect the work equipment and devices reliability and service life. Polymers are widely used in electrical equipment and electronic devices in the insulating material, but the low thermal conductivity of most polymeric materials, severely restricted the lifting devices of various thermal management capabilities. To solve this problem, in a conventional manner by adding a large amount of the inorganic reinforcing filler thermal conductivity of the thermally conductive material to improve thermal management capability in the polymer. However, this method while satisfying improve thermal management capability, the expense of polymeric material insulating properties, mechanical properties and processing properties. Thus, at low to achieve efficient heat management is filled with thermal insulation material research a major challenge. Solution Professor Jiang Pingkai team first support using cellulose nanofibers as a template, by a sol-gel method and freeze-dried in vacuoPreparation of three-dimensional interconnection technology nanosheet boron airgel, is obtained and then pouring an epoxy resin to give a nanocomposite insulating material. Results The test results show that the material at a low content of the boron nitride nanosheet (only 9.6 vol%), compared to the thermal conductivity increased about 14 times the ordinary epoxy resin, the prior reports thermally conductive polymer insulation efficiency enhancement new record, and more importantly, such a material while maintaining the excellent insulating properties of epoxy resin, the volume resistivity of 1015Ω · cm. Infrared observed using the nanocomposite faster than conventional insulating material having a plurality nanocomposite thermal response rate, described with good prospects in terms of thermal management. Analysis, high performance nanocomposite benefited BN nano multilayer sheet itself high thermal conductivity (up 360Wm-1K-1) and a high insulating property. learn more, attention Yin set net Materials Technology News Channel: http: //www.xianjichina.com/news/list_13.