2020 high-heat conducting polymer composites Study Collection

With the increasing high power and high integration of electrical and electronic equipment, in order to improve the heat dissipation efficiency of the device to ensure efficient and stable operation of the device, the industrial production of the thermal conductivity of the polymeric material of a higher requirement. Composite high thermal conductivity fillers (e.g., graphene, carbon nanotubes, BN, metal oxide) is a simple and efficient way to improve the thermal conductivity of the polymeric material present in the industrial production has been widely applied. Preparation of dispersion method but using a conventional heat conducting polymer matrix composites there are obvious drawbacks, such as the filler content is too low results in poor thermal conductivity to enhance the effect, and high filler content results in a significant reduction in workability and mechanical properties of materials Wait. Numerous studies show that the conventional thermally conductive network constructed inside the polymer material can be achieved greatly improve the thermal conductivity at a low addition amount, such as Georgia Tech Ching-Ping Wong Professor United Shandong University [ 123] Prof. Gang Lian the research team pouring a low viscosity epoxy in the graphene airgel composite material obtained after curing with only under conditions of 0.92 vol% graphene to enhance the thermal conductivity of 2.13 W m -1 · K-1 [Chem. Mater. 2016, 28, 6096-6104]. Here, we simply sort out some of the research literature with high thermal conductivity, thermal conductive filler network of polymer matrix composites since 2020, for all to study and exchange.

1. Preparation of Template Method salt thermally network BN to improve the thermal conductivity epoxy Technological University professor Xiao Hu PVDF as a research team in adhesives, prepared by using the three-dimensional template method salt PVDF-BN thermally conductive network, and the method of vacuum impregnation of the high thermal conductivity of the prepared epoxy resin / BN-PVDF composite, test results show that BN can be added 21wt% of the thermal conductivity of the composite material increased to 1.227 W m-1 · K -1. We found Epoxy / BN-PVDF high thermal conductivity is to convey a three-dimensional network of BN phonons, reducing the epoxy / BN interface and lower interfacial thermal resistance due to integrated. Meanwhile, in the high temperature processing PVDF decomposed into carbon phonon scattering can be suppressed, thereby further improving the thermal conductivity. The study, entitled \”Salt Template Assisted BN Scaffold Fabrication toward Highly Thermally Conductive Epoxy Composites \”paper made in the\” ACS Appl Mater Interfaces \”journals

Original link:… https: //pubs.acs.org/doi/10.1021/acsami.0c04882 [ 123] 2. -BN composite thermally conductive graphene network enhance the thermal conductivity of rubber

Professor Yonglai Lu Beijing University of Chemical research team developed a new auxiliary graphene oxide gelling method, the obtained graphene -BN composite thermally conductive network, and the highly flexible rGO-BN-NR composite film having excellent heat dissipation performance prepared by combination of simple thermal compression process. the results are shown rGO-BN BN in the case of a loading of 250 phr, prepared -NR composite film plane thermal conductivity of up to 16.0 W m-1 · K-1, while the composite film also has excellent mechanical properties (113% elongation at break), flame retardancy and antistatic properties. thermal infrared imaging finite element simulation demonstrated binding rGO-BN-NR composite film having a strong cooling capacity, it has broad application prospects in the field of thermal management of a variety of new electronic devices. in this study, entitled \”Advanced flexible rGO-BN natural rubber films with high thermal conductivity for improved thermal management capability \”of paper made in the\” Carbon \”journals in situ links:. https: //www.sciencedirect.com/science/article/pii/S0008622320301500

[ 123] 3 carbon – copper thermally conductive epoxy network enhance thermal conductivity and electrical conductivity

Tianjin University professor Huaiyuan Wang Study groupTeam uses the carbon felt (CFelt) as a 3D skeleton, the surface plating layer of copper CFelt to construct a 3D carbon – thermal conductivity of copper network and then impregnated with epoxy resin in 3D C-Cu network of high thermal conductivity epoxy prepared resin composite material. Test results show that the use of 3D carbon – thermal conductivity of copper allows the epoxy network from 0.22 W m-1 · K-1 to the maximum lift 30.69 W m-1 · K-1, to enhance the rate of close to 140 times, but not of copper 3D network structure of carbon epoxy composite thermal conductivity of the maximum is only 0.28 W m-1 · K-1. Further, the composite material obtained also maintaining good mechanical properties and good electrical conductivity (7.49 × 104 S · cm-1). The study, entitled \”A 3D interconnected Cu network supported by carbon felt skeleton for highly thermally conductive epoxy composites\” paper issued on \”Chemical Engineering Journal\” journals. Original link: https: //www.sciencedirect.com/science/article/pii/S1385894720302783

4 imitation tree ring network structure to enhance the thermally conductive silicone rubber elastic bulk thermal conductivity [. 123] Shanghai Jiaotong University research team, Professor Xingyi Huang natural tree-ring structure for inspiration, under alkaline conditions, combining one-dimensional and two-dimensional carbon nanotube graphene oxide flakes, supplemented by joint drying method, developed a long range order microstructure on the thermal conductivity of carbon nanotubes skeleton (T-SGM); T-SGM then impregnated into polydimethylsiloxane (PDMS) resin, prepared by a timber having the ring structure high thermal conductivity composites. Results are shown in the case of T-SGM content of 6.0 vol%, the thermal conductivity of the inner surface of the T-SGM / PDMS composite material can be increased 744%, to 1.52 W m-1 · K-1. The study, entitled \”Wood annual ring structured elastomer composites with high thermal conduction enhancement efficiency \”of the paper made in the\” Chemical Engineering Journal \”Journal

Original link:. https: //www.sciencedirect.com/science/article/pii/S1385894719328803 [123 ] 5. vertically aligned thermally conductive carbon fiber network to enhance the thermal conductivity of the epoxy resin

Modern Industry technology Shenzhen Xiaoliang Professor Zeng team by a method of carbon fiber perpendicular freezing preparing a carbon fiber structure of the vertical alignment (the 3D- CFs) thermally conductive network, and after freeze-drying epoxy resin matrix prepared epoxy infiltration heat conducting composite material having high mechanical strength and thermal stability. the results show that the thermal conductivity of epoxy resin is of only 0.19 W m-1 · K-1, and 3D-CFs containing 13.0 vol% of the inner surface may be epoxy composite thermal conductivity of up to 2.84 W m-1 · K-1. the computer simulation results show that after CFs highly aligned inside the composite material CFs-CFs mainly from thermal interface instead CFs- epoxy interface. epoxy to improve the thermal conductivity at the same time, 3D-CFs may further composite coefficient of thermal expansion (CTE) of lowered to 23.63 ppm k-1, the glass transition temperature was increased to 222.8 ℃, having a wide application prospect thermal interface materials (TIMs). in this study, entitled \”through-plane assembly of carbon fibers into 3D skeleton achieving enhanced thermal conductivity of a thermal interface material\” the paper made on \”Chemical Engineering Journal\” Journal original link:. https:. //www.sciencedirect.com/science/article/pii/S1385894719319539

6 aluminum-based pods – NIMTE graphene network upgrade epoxy composite thermal conductivity

Chinese Academy of Sciences graphene binary complex to give an aluminum heat conductive epoxy resin impregnated web after curing and elevated temperature, – – graphene / epoxy composites Institute Professor He Li Jinhong Yu and research teams manner by vacuum filtration class aluminum pod preparation. The results show a case where the graphite content of ethylenically 12.1 wt%, an aluminum content of 42.4 wt% of aluminum – graphene / epoxy composite material to increase the axial thermal conductivity of 13.3 W m-1 · K-1, the radial thermal conductivity rate of 33.4 W m-1 · K-1, increased by about 166 times higher than pure epoxy. The study, entitled \”Constructing a\” pea-pod-like \”alumina-graphene binary architecture for enhancing thermal conductivity of epoxy composite\” issued on paper \”Chemical Engineering Journal\” Journal. Original link: https: //www.sciencedirect.com/science/article/pii/S1385894719320935

7.Mxene PDMS network while improving thermal and electrical conductivity

Shanghai Jiaotong University professor Xingyi Huang unidirectional lyophilization team prepared MXene highly oriented three-dimensional network structure, a composite material with a composite PDMS PDMS obtained compared to the original high thermal and electrical conductivity – in an amount of 2.5 MXene vol% under the conditions of thermal and electrical conductivity are improved by 220% and 14 orders of magnitude. The study, entitled \”Multifunctional 3D-MXene / PDMS nanocomposites for electrical, thermal and triboelectric applicationse \”paper issued in\” Composites Part A:. on Applied Science and Manufacturing \”journals Original link: https: //www.sciencedirect.com/science/article/pii/S1359835X19305032 [ 123]

8.BN- chitosan thermally conductive network to improve the phase change material thermal conductivity Zhang Sichuan University Professor Lu Canhui boron team environment friendly manner preparing freeze-dried – chitosan (BN @ CS) thermally conductive mount, the polyethylene glycol (PEG) into BN @ CS holder, to give a large latent heat of melting, good shape stability composite phase change materials (PCMs) results display unit. when the content of BN is 27wt%, the thermal conductivity of the composite PCMs raised to 2.77 W m-1 · K-1, a storage density of 136 J · g-1, having a waste heat recovery is in the cooling system and temperature control systems large potential for application to the study entitled \”High thermal conductive shape-stabilized phase change materials of polyethylene glycol / boron nitride @ chitosan composites for thermal energy storage\” in papers made: the \”Composites Part a applied Science and Manufacturing\” Journal .

original link: https: //www.sciencedirect.com/science/article/pii/S1359835X19304592

9.SiC-rGO-NCF three yuan thermally conductive network to improve the thermal conductivity of the silicone rubber Yong Zhang Shanghai Jiaotong University research team silicon carbide nanowires, reduced graphene oxide and cellulose nanofibers assembly unit constructed vertically aligned SiC-rGO-NCF three yuan network using thermally ice template method. Polyethylene glycol graft filled polydimethyl siloxanes prepared by a SiC-rGO-NCF / silicone rubber composites. The results show that the thermal conductivity of the composite material decrease with increasing SiC content and rGO content increases, when the total thermal conductivity Ternary network of 1.84wt%, the thermal conductivity of the composite material increased to 2.74 W m-1 · K- 1, compared to the original silicone rubber, thermal conductivity increased 16-fold. The study, entitled \”Vertically aligned silicon carbide nanowires / reduced graphene oxide networks for enhancing the thermal conductivity of silicone rubber composites\” papers sent in: the \”Composites Part A Applied Science and Manufacturing\” journals.

Original link: https:. //Www.sciencedirect.com/science/article/pii/S1359835X20301111

10 The reaction thermally induced phase separation construct a network Shanghai University of Engineering Weizhen Li Professor team by a simple and efficient reaction induced phase separation (the RIPS) to establish a heat-conducting network BNNSs-NH2 / epoxy / polyetherimide (PEI) system of ternary blends. The study found amination BN (BNNSs-NH2) was added to the ethylene / PEI mixed system, with the curing time of epoxy and PEI phase separation occurs while BNNSs-NH2 tended to be present in the epoxy / PEI interface , thus constructed has a good heat network, when the additive amount BNNSs-NH2 1wt%, the thermal conductivity of the composite material can increase 83%. Simultaneously, BNNSs-NH2 RIPS have a major impact on the kinetics and which promotes the curing reaction of the epoxy with improved Tg and the temperature of the resultant composite. The study, entitled \”Self-constructing thermal conductive filler network via reaction-induced phase separation in BNNSs / epoxy / polyetherimide composites\” paper issued in \”Composites Part A: Applied Science and Manufacturing\” journal.

Original link: https: //www.sciencedirect.com/science/article/pii/S1359835X19304762 [summary]

The embodiment constructed in the interior of the thermally conductive polymer network can greatly enhance the thermal material conductivity while maintaining excellent mechanical properties. However, according to available literature, we can find that the majority of thermally conductive network constructed mainly for low viscosity polymer precursor oligomer or small molecule in a composite material prepared, as applied to the polymer matrix a wider range of materials thermally conductive network currently few reports. So in the future we need to vigorously develop new thermal network built, to produce a greater variety of high thermal conductivity of polymer composites.