Overheat problem is limitation microelectronics parts of an apparatus is farther compositive change, high density is changed, the key that miniaturization develops. Have exceedingly good medicinal powder the hot interface material of heat energy force (TIMs) can the bridge connects heat source and radiator, realize the directional dissipation of thermal current. Among them, the TIMs that is matrix with epoxy resin is had stick high receive, mechanical intensity the advantage such as insulation of tall, report, can reduce osculatory thermal resistance effectively and promote an electron the reliability of equipment. However, of the heat conduction filling with the thermal conductance with inferior epoxy resin and dispersive isotropy medicinal powder heat energy power is limited. On the other hand, the tall caking property of epoxy resin and not dissolve not frit character is inevitable also problem of ” of rubbish of electron of ground aggravate “ . Accordingly, development holds a tall heat conduction and the annulus oxygen TIM that can reclaim concurrently to have important sense. Liu Xiaoqing of place of stuff of peaceful wave of Chinese Academy of Sciences's researcher devotes oneself to to be able to heat up solid sex colophony to consider continuously all the time, contrived series is high-powered colophony of sex of biology radical hot solid (Prog. Polym. Sci. , 2021, 113, 101353; Green Chem. , 2021, 23, 8643; Chem. Eng. J. , 2022, 428, 131226; Compos. B: Eng. , 2020, 190, 107926) , developed colophony of new hot solid sex to be worth a debit law high (carbon reclaims, complete constituent reclaims) with a variety of function sexes composite material (Adv. Mater. , 2022, 2209545; Small, 2022, 18, 2202906; Nano Energy, 2022, 100, 107477; ACS Nano, 2021, 15, 12, 19490-19502; Chem. Eng. J. , 2023, 460, 141882; Compos. Sci. Tech. , 2023, 238, 110028) . Recently, this group designed a kind to contain shrink aldehyde, 2 sulfur and the biology that ester bolts base epoxy resin kind vitreous body, use at laden 40 Wt. % nitrogen change boron (BN) heat conduction filling serves as TIM. Among them, the ability of fast key exchange that 2 sulfur bolt makes in-house filling can be below hot pressing condition orientaton is arranged, realize anisotropy tall heat conduction thereby. In the meantime, the vitrification change when annulus oxygen matrix is heating and stress make TIM is had flabbily touch denaturation to get used to rough surface thereby, reduce osculatory thermal resistance. In addition, profit from is multiple and flabby decide what key gifts to classification degradation mechanism, this composite material can fall in gentle condition efficient reclaim to be worth filling and main raw material high. This job is provided to hold concurrently can reclaim, the design offerred high-powered TIMs to solve train of thought feasibly.
Graph 1. Come loose high hot, can the design train of thought of the annulus oxygen TIM that complete constituent reclaims
Graph 2. The preparation of composite material, key is exchanged and classification degradation mechanism; Imitate of hot pressing orientaton; In-house filling form appearance
Graph 3. The anisotropy heat conduction of composite material is comparative, finite the composite material after has hot pressing of yuan of imitate result classics exceedingly good anisotropy thermal conductance, the heat conduction outside the knead dough inside the face is respectively 3.85 with 0.296 W M-1K-1, anisotropy is compared achieved 13. Among them, photograph of the heat conduction inside the face is mixed than pure colophony promoted respectively without material of hot pressing processing 29 times with 3.3 times. In addition, the thermal conductance inside the face and heat conduction anisotropy compare congener profile makings to have an advantage than two function photograph.
Graph 4. Composite material uses as when TIM medicinal powder the vitrification temperature that because annulus oxygen matrix is inferior,heats up function and circular stability and key exchange temperature, annulus oxygen TIM can issue generation to touch denaturation in proper temperature, thereby stuff is rough the surface, reduce osculatory thermal resistance gradually. Thermal resistance of place calculative contact is 3.74×10-5 K M−2 W−1, 2.82 what be close to fat of silicon of business carry out×10-5 K M−2 W−1. As a result of the heat conduction inside higher area and inferior osculatory thermal resistance, this TIM can diffuse the central quantity of heat of chip to whole plane, increase thereby medicinal powder hot area. Waiting for time inside, the fat of silicon of business carry out with the central temperature more approximate than filling content photograph of correspondence of annulus oxygen TIM (1 W M-1K-1) ℃ of low 20. In addition, profit from is multiple and flabby decide what key gifts to be able to classification degradation sex, this composite material can be in after making battle cycle ends, polyphase hydrolyze system is formed below gentle chemical condition, realize complete constituent to reclaim. Classics computation, BN reclaims rate be as high as 96.2% , other raw material reclaims rate for 73.6%-82.4% . This job to can last the design of TIM material and complete constituent reclaim offerred train of thought. Relevant achievement with “A Full-compoNent Recyclable Epoxy/BN Thermal Interface Material With Anisotropy High Thermal CoNductivity And Interface Adaptability” publishs in for the problem " Chemical Engineering Journal " on (DOI: 10.1016/j.cej.2023.143963) . What Dr. Liu Jingjie and Feng grand foreign doctor are a paper is collective the first author, joint newsletter writer is Dai Jinyue's deputy researcher and Liu Xiaoqing's researcher. The project got 10 thousand people plan the nation, zhejiang omits plan of 10 thousand people, national science foundation, zhejiang saves the support of postdoctoral foundation of science fund of science foundation, peaceful wave city and China.
