公开(公告)号：US12098263B1

公开(公告)日：2024-09-24

申请号：US18393580

申请日：2023-12-21

申请人： SICHUAN UNIVERSITY

发明人： Junwen Ren ,  Zi Wang ,  Shenli Jia ,  Lihua Zhao ,  Huachao Wei ,  Chao Bian ,  Guoqing Jiang ,  Ruichi Zeng

IPC分类号： C09C1/40 ,  C08K9/10 ,  C09C3/00

CPC分类号： C08K9/10 ,  C09C1/407 ,  C09C3/006 ,  C08K2201/005

摘要： A composite insulating material based on dielectrophoretic force orientation and its preparation method are provided. The method includes: S1, preparing dielectric composite microspheres with a dielectric epoxy resin as a core and a hexagonal boron nitride sheet as a shell; S2, dispersing the hexagonal boron nitride sheet and the dielectric composite microspheres in an organic solvent to obtain a dispersion liquid, and adding an epoxy resin, an epoxy resin curing agent, and an epoxy resin accelerator to the dispersing liquid, and evaporating the organic solvent to obtain a composite substrate; S3, pouring the composite substrate into a container, wherein an upper surface and a lower surface of the container are connected with electrodes, respectively, transferring the container to a vacuum oven, and connecting a power supply of the container to adjust a voltage amplitude and a frequency of the electrodes, conducting dielectrophoretic force orientation on the dielectric composite microspheres in the composite substrate, so as to cause the dielectric composite microspheres to arrange along a direction of electric field; S4, increasing a temperature of the container to cure the composite substrate, cutting off the power supply to the container after curing, and obtaining the composite insulating material.

公开(公告)号：US12065607B1

公开(公告)日：2024-08-20

申请号：US18395733

申请日：2023-12-25

申请人： SICHUAN UNIVERSITY

发明人： Junwen Ren ,  Zi Wang ,  Shenli Jia ,  Lihua Zhao ,  Huachao Wei ,  Lichuan Jia ,  Guoqing Jiang ,  Ruichi Zeng

IPC分类号： C09K5/14 ,  C08J3/205 ,  C08K3/38 ,  C08K9/02 ,  C08K9/04 ,  C09C3/00 ,  C09C3/04 ,  C09C3/08 ,  C09K9/00

CPC分类号： C09K5/14 ,  C08J3/2056 ,  C08K9/02 ,  C08K9/04 ,  C09C3/006 ,  C09C3/048 ,  C09C3/08 ,  C09K9/00 ,  C01P2004/03 ,  C01P2004/24 ,  C01P2006/32 ,  C08J2383/04 ,  C08K2003/385 ,  C08K2201/001 ,  C08K2201/011

摘要： A silicone rubber composite heat dissipation pad and a preparation method thereof are provided. The method includes: dispersing hydroxyl-functionalized boron nitride nanosheet powder into deionized water, pouring it into a specialized container, pre-freezing it using liquid nitrogen, and then freeze-drying it to obtain a boron nitride nanosheet skeleton arranged in a horizontal direction; uniformly dispersing thermochromic nanoparticles in acetone to obtain a dispersion, mixing the dispersion with liquid silicone rubber and stirring until acetone is completely evaporated, then adding a curing agent to obtain a liquid silicone rubber pre-cure solution; pouring the liquid silicone rubber pre-cure solution into a container containing the boron nitride nanosheet skeleton, so that the liquid silicone rubber pre-cure solution is fully immersed in an interior of the boron nitride nanosheet skeleton; and then curing is carried out by elevating the temperature to obtain the heat dissipation pad.