▎ 摘　　要

NOVELTY - Preparing porous framework with double interlaced network comprises (a) taking first filler, binder and water, mixing, ball milling to obtain first filler mixture, (b) taking a radial forming device that has been placed in a low-temperature refrigeration medium in advance, dropping first filler mixture, freezing to form a frozen mixture, freeze-drying to obtain first porous framework, (c) taking second filler, binder and water, mixing, ball milling to obtain the second filler mixture, (d) placing polytetrafluoroethylene mold on the copper column that has been placed in the low-temperature refrigeration medium in advance, placing the first porous framework in a mold, adding second filler mixture into the polytetrafluoroethylene mold loaded with the first porous framework, vacuum filtering, freezing to form a frozen mixture, freeze-drying to obtain the second porous framework and (e) subjecting the second porous framework to two-stage sintering treatment to obtain product. USE - The porous framework is used as heat conductive filler in heat interface material (claimed). ADVANTAGE - The porous framework improves the heat conductivity of the composite material. The method is simple, economical and has wide application. DETAILED DESCRIPTION - Preparing porous framework with double interlaced network comprises (a) taking first filler, binder and water, mixing, performing ultrasonic or ball milling treatment to obtain first filler mixture, (b) taking a radial forming device that has been placed in a low-temperature refrigeration medium in advance, dropping the first filler mixture obtained in the step (a), freezing by the radial ice template method to form a frozen mixture, freeze-drying to obtain the first porous framework, (c) taking the second filler, binder and water, mixing, performing ultrasonic or ball milling treatment to obtain the second filler mixture, (d) placing polytetrafluoroethylene mold on the surface of the copper column that has been placed in the low-temperature refrigeration medium in advance, placing the first porous framework obtained in the above step (b) in a polytetrafluoroethylene mold, adding second filler mixture obtained in the step (c) into the polytetrafluoroethylene mold loaded with the first porous framework, vacuum filtering, freezing using traditional one-way ice template method to form a frozen mixture, freeze-drying to obtain the second porous framework and (e) subjecting the second porous framework obtained in the above step (d) to two-stage sintering treatment to obtain product. An INDEPENDENT CLAIM is also included for a porous framework with a double interlaced network, which is prepared by the above method.