Silicon carbide(SiC)high-voltage,high-power semiconductor devices are essential for next-generation power systems,yet conventional silicone elastomer encapsulation materials suffer from insulation degradation under ex...Silicon carbide(SiC)high-voltage,high-power semiconductor devices are essential for next-generation power systems,yet conventional silicone elastomer encapsulation materials suffer from insulation degradation under extreme thermal and electrical stresses,highlighting the critical need for novel dielectric materials.This article brings phenyl groups into the side group of conventional silicone elastomers through ring-opening polymerisation and hydrosilylation,developing phenyl-modified silicone elastomers.The material's superior thermal resistance is substantiated through thermal ageing and thermogravimetric analysis.Moreover,this study delineates the insulating robustness of the material by gauging its dielectric breakdown voltage.By subjecting the material to pulse electric fields,we investigate the insulating properties of the encapsulation material under operational conditions reflective of actual service environments.Dielectric testing and molecular electrostatic potential simulations are further employed to analyse the enhancement of the material's insulating properties due to the introduction of phenyl groups.Research studies indicate that phenyl silicone elastomers exhibit outstanding temperature and electrical resistance,performing well under pulsed electric field.This is associated with the phenyl group's rigid structure,conjugated system,and its electron-withdrawing characteristics.Study provides a theoretical foundation for improving the insulating properties of encapsulation materials and the operational reliability of power electronic devices.展开更多
Dynamic chemistry based on reversible chemical bonds has emerged as a pivotal strategy for the development of nextgeneration materials.This highlight discusses a breakthrough reported by Zheng,Xie,and colleagues[1]fro...Dynamic chemistry based on reversible chemical bonds has emerged as a pivotal strategy for the development of nextgeneration materials.This highlight discusses a breakthrough reported by Zheng,Xie,and colleagues[1]from Zhejiang University in a recent science article,where they discovered a thermally reversible photo-click thiol-aldehyde reaction and applied it to achieve closed-loop recycling of 3D photo-printed polymers.展开更多
As vip editors of this special issue of Nano Research,we are delighted to celebrate the 20th anniversary of the Institute of Surface Micro and Nano Materials(ISMNM)at Xuchang University—a milestone that marks two d...As vip editors of this special issue of Nano Research,we are delighted to celebrate the 20th anniversary of the Institute of Surface Micro and Nano Materials(ISMNM)at Xuchang University—a milestone that marks two decades of pioneering research,interdisciplinary collaboration,and impactful translation in the field of micro and nano materials.This special issue,featuring 94 cutting-edge papers from global researchers,not only honors the institute’s legacy but also reflects the vibrant,rapidly evolving landscape of surface micro and nano materials science and engineering.展开更多
基金National Natural Science Foundation of China(Grants 52277155,52177183).
文摘Silicon carbide(SiC)high-voltage,high-power semiconductor devices are essential for next-generation power systems,yet conventional silicone elastomer encapsulation materials suffer from insulation degradation under extreme thermal and electrical stresses,highlighting the critical need for novel dielectric materials.This article brings phenyl groups into the side group of conventional silicone elastomers through ring-opening polymerisation and hydrosilylation,developing phenyl-modified silicone elastomers.The material's superior thermal resistance is substantiated through thermal ageing and thermogravimetric analysis.Moreover,this study delineates the insulating robustness of the material by gauging its dielectric breakdown voltage.By subjecting the material to pulse electric fields,we investigate the insulating properties of the encapsulation material under operational conditions reflective of actual service environments.Dielectric testing and molecular electrostatic potential simulations are further employed to analyse the enhancement of the material's insulating properties due to the introduction of phenyl groups.Research studies indicate that phenyl silicone elastomers exhibit outstanding temperature and electrical resistance,performing well under pulsed electric field.This is associated with the phenyl group's rigid structure,conjugated system,and its electron-withdrawing characteristics.Study provides a theoretical foundation for improving the insulating properties of encapsulation materials and the operational reliability of power electronic devices.
文摘Dynamic chemistry based on reversible chemical bonds has emerged as a pivotal strategy for the development of nextgeneration materials.This highlight discusses a breakthrough reported by Zheng,Xie,and colleagues[1]from Zhejiang University in a recent science article,where they discovered a thermally reversible photo-click thiol-aldehyde reaction and applied it to achieve closed-loop recycling of 3D photo-printed polymers.
文摘As vip editors of this special issue of Nano Research,we are delighted to celebrate the 20th anniversary of the Institute of Surface Micro and Nano Materials(ISMNM)at Xuchang University—a milestone that marks two decades of pioneering research,interdisciplinary collaboration,and impactful translation in the field of micro and nano materials.This special issue,featuring 94 cutting-edge papers from global researchers,not only honors the institute’s legacy but also reflects the vibrant,rapidly evolving landscape of surface micro and nano materials science and engineering.
