After the modification of h-BN, the few minor ingestion peaks show up close to 2973 cm−1, which represents the C–H extending vibrations of the hydrocarbon chain of the addition of APTES [20,21,22]. 1. Then, fillers were added and followed by hand stirring. product allows for both high electrical conductivity and superior thermal conductivity. Thermal conductivity of 0.68 W/(m•K) Low exotherm Convenient 1A:1B volume mix ratio High compressive and tensile strength Excellent adhesion to a wide variety of substrates including metals, … The TGA curve of neat epoxy and the four optimized hybrid composites is illustrated in Fig. This work is supported by the Board of Research Board in Nuclear Science (BRNS), Department of Atomic Energy (DAE), Government of India (Project No. FTIR spectra of h-BN and mh-BN (a) and GO and RGO (b). 12b, whereas mh-BN shows a good distribution with RGO in the epoxy matrix as illustrated in Fig. 7 along with previously gathered experimental values [39,40,41]. The absence of a 3534 cm−1 peak in RGO reveals the absence of OH group after reduction. 7a, b, Maxwell and Hashin–Shtrikmann model estimates nearer to the TC values. trailer << /Size 1048 /Info 1006 0 R /Root 1010 0 R /Prev 246936 /ID[<269b941955d53c191626509df344c992><128657cd8b7c76e5d676c88a56d531a9>] >> startxref 0 %%EOF 1010 0 obj << /Type /Catalog /Pages 1007 0 R /Metadata 1008 0 R /Outlines 50 0 R /OpenAction [ 1012 0 R /XYZ null null null ] /PageMode /UseNone /PageLabels 1005 0 R /StructTreeRoot 1011 0 R /PieceInfo << /MarkedPDF << /LastModified (D:20030918090347)>> >> /LastModified (D:20030918090347) /MarkInfo << /Marked true /LetterspaceFlags 0 >> >> endobj 1011 0 obj << /Type /StructTreeRoot /ClassMap 54 0 R /RoleMap 56 0 R /K 568 0 R /ParentTree 957 0 R /ParentTreeNextKey 15 >> endobj 1046 0 obj << /S 248 /O 408 /L 424 /C 440 /Filter /FlateDecode /Length 1047 0 R >> stream Int Mater Rev 63(1):22–45, Huang L, Zhu P, Li G, Lu DD, Sun R, Wong C (2014) Core–shell SiO 2@ RGO hybrids for epoxy composites with low percolation threshold and enhanced thermo-mechanical properties. Regardless of filler type, the mechanism of conductivity … In a similar way, we can identify the reason behind the thermal decomposition temperature of sample mh-BN/GO4/epoxy hybrid composite is 372.82 °C and sample mh-BN/RGO4/epoxy hybrid composite is 374.53 °C. This was also due to the compatibility of GO and mh-BN as they are iso-structure and having more number of functional groups which can bind filler with matrix effectively and hybrid composites with substrate [18]. Ltd. (Bangalore, India). Equation 4 is derived from the rule of the mixture and does not consider voids. The long-MWCNT composites exhibited higher thermal conductivity than the short-MWCNT composites when the weight percentages were the same. In this work, h-BN and APTES-modified h-BN were incorporated in an epoxy matrix along with GO and RGO with different weight fractions [14]. It was found that the thermal conductivity of pristine epoxy (0.21 W/mK) enhanced gradually with the incorporation of GO or RGO with h-BN and mh-BN. Therefore, the interfacial phonon scattering and thermal resistance inside the epoxy are reduced efficiently. 0000007465 00000 n The enhancement of adhesive joint strength with the hybrid filler content may be due to the resistance to fracture contributed by the hybrid fillers with the help of crack blunting mechanism. Butane - Thermal Conductivity - Online calculators, figures and tables showing thermal conductivity of liquid and gaseous butane, C 4 H 10, at varying temperarure and pressure, SI and Imperial units … It was also due to the dispersion ability of RGO as filler in the epoxy matrix to minimize the agglomeration and voids [17]. Figure 4b displays the SEM image of the modified h-BN (i) and pristine h-BN (ii). RSC Adv 6(42):35847–35854, Huang T, Zeng X, Yao Y, Sun R, Meng F, Xu J, Wong C (2017) A novel h-BN–RGO hybrids for epoxy resin composites achieving enhanced high thermal conductivity and energy density. This is because the thermal stability of RGO is better than GO, because of the presence of moisture and more oxygen functional groups in GO as related to RGO, which reduces the degradation temperature of GO [33, 34]. The surface homogeneity is quite evident in Fig. J Adhes 89(1):55–75, Hu K, Kulkarni DD, Choi I, Tsukruk VV (2014) Graphene-polymer nanocomposites for structural and functional applications. 38.15 BTU•in/ft 2 •hr•°F [5.5 W/(m•K)] ... • Exceptionally high thermal conductivity … However, high loading, i.e., more than 60% filler fraction, pays penalty to mechanical and other properties like viscosity and bonding strength, which create hindrance in the application of high-performance electrical chip [16]. Table 1 shows that the thermal conductivity values of these hybrid filler composite systems were increased as compared to single filler loading. Correspondence to 1, 337 (2019). 0000003493 00000 n Int J Heat Mass Transf 114:727–734, Lee JK (2007) Prediction of thermal conductivity of composites with spherical fillers by successive embedding. In this research, we report the epoxy-based hybrid composites with an enhanced thermal conductivity through silane-modified h-BN (mh-BN) with RGO. The image (Fig. 0000009357 00000 n (1). Good thermal conductivity (0.72 W/m-K) Low CL ion content and outgassing; 3M™ Thermally Conductive Epoxy Adhesive TC-2707 is a thermally conductive 2-part epoxy using aluminum metal fillers for good thermal conductivity … Moreover, h-BN with GO and RGO has good compatibility in an epoxy matrix, which restricts the movement of the polymer chain for easy decomposition. The maximum value of thermal conductivity is 1.416 W/mK which is obtained due to the addition of RGO (4.5 wt%) and mh-BN (40 wt%) hybrid in an epoxy … Silver is second only to diamonds in terms of a thermal conductivity of 30–300 W/mK and application. Washed with distilled water followed by 5 min sonication distinct edges, wrinkled surfaces and folding with aggregation... 1209 cm−1 represent C=O=C stretching vibration absorption [ 8, the interfacial phonon scattering and thermal conductivity comparison vibration. Maxwell and Hashin–Shtrikmann model estimates nearer to the better distribution of mh-BN as compared to pristine h-BN and (! The h-BN/GO and h-BN/RGO–epoxy hybrid composites are described by A. K. Singh et.... Composites performed well up to 250 °C ( AFM, XE-100, Park—South )... To 3.5 W/ ( m•K ) thermal conductivity of Tao Huang et al in. Tc becomes high lay-off technique which is illustrated in Fig h at 110 °C carboxylic is found at 1744 and! 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