Graphene material directional arrangement and silica gel pad composite molding method and product

• Main Authors: LIU BIN, HUAI XIULAN, LI XUNFENG, ZHOU JINGZHI, HU XUANYE
• Format: Patent
• Language: Chinese; English
• Published: 23.08.2019
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention provides a graphene material directional arrangement and silica gel pad composite molding method and a thermally conductive silica gel pad product. A graphene powder material is wetted and dispersed and surface modified by adopting an organic volatilizable dilution solvent and a coupling agent. The obtained graphene dispersion liquid is added to the upper surface of a substrate pad in a spraying or coating mode. With volatilization of the organic dilution solvent, graphene can realize good directional arrangement, and excellent thermal conductivity and soaking performance of thethermally conductive pad are realized. Meanwhile, in a high-temperature vulcanization process, the coupling agent containing unsaturated groups adsorbed on the surface of graphene can generate crosslinking reaction with hydrogen-containing silicone oil and vinyl on the surface of the pad, thereby realizing firm connection between the graphene material and the raphene material directional arrangement and silica gel pad com