Dry-Contact Thermal Interface Material with the Desired Bond Line Thickness and Ultralow Applied Thermal Resistance

Dou, Zhengli; Zhang, Bin; Xu, Pengfei; Fu, Qiang; Wu, Kai

doi:10.1021/acsami.3c13298

Cited by 4 publications

(2 citation statements)

References 49 publications

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“…In Case IV, the thermal conductivity of the Al2O3-siloxane composite thermal pads improved by 26.5% at a high filler content compared to Case I This improvement in thermal conductivity can be attributed to the thermal bridge effec at the interface between Al2O3 and siloxane. These surface treatments (Cases II, III, and IV resulted in the formation of more interconnected thermal pathways and contributed to the enhancement of adhesive contact as the LNG flow rate increased via the relaxation o the internal friction between Al2O3 and siloxane [28]. The cross-sections of the Al2O3- Table 6 presents the thermomechanical and electrical properties of the Al 2 O 3 -siloxane composite thermal pads with various process parameters, such as volume fraction of Al 2 O 3 nanoparticle powder, thickness of composite pads, and surface-treated Al 2 O 3 nanoparticle powder (Cases II, III, and IV).…”

Section: Fabrication Of Al 2 O 3 -Siloxane Composite Thermal Padsmentioning

confidence: 99%

Fabrication and Characterization of Al2O3-Siloxane Composite Thermal Pads for Thermal Interface Materials

Kim,

Koo,

Kim

et al. 2024

Materials

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In this study, Al2O3–siloxane composite thermal pads were fabricated using a tape–casting technique, and the thermal conductivity effect of the Al2O3 nanoparticle powder synthesized using a flame fusion process on siloxane composite thermal pads was investigated. Furthermore, various case studies were implemented, wherein the synthesized Al2O3 nanoparticle powder was subjected to different surface treatments, including dehydration, decarbonization, and silylation, to obtain Al2O3–siloxane composite thermal pads with high thermal conductivity. The experimental results confirmed that the thermal conductivity of the Al2O3–siloxane composite pads improved when fabricated using surface–treated Al2O3 nanoparticle powder synthesized with an optimally spheroidized crystal structure compared to that produced using non–treated Al2O3 nanoparticle powder. Therefore, this study provides guidelines for fabricating Al2O3–siloxane composite thermal pads with high thermal conductivity in the field of thermal interface materials.

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Section: Fabrication Of Al 2 O 3 -Siloxane Composite Thermal Padsmentioning

confidence: 99%

Fabrication and Characterization of Al2O3-Siloxane Composite Thermal Pads for Thermal Interface Materials

Kim,

Koo,

Kim

et al. 2024

Materials

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“…Analogously, the sharp elevation in heat accumulation increases the likelihood of fire. Thermal interface materials (TIMs) have been utilized to fill the gap between the heat source and heat sink, thereby enunciating the thermal flow to evade the occurrence of heat buildup [1]. Owing to their low cost, lightweight, and processability, polymeric materials have gained much attention in electronic thermal management applications [2].…”

Section: Introductionmentioning

confidence: 99%

Preparations and Thermal Properties of PDMS-AlN-Al2O3 Composites through the Incorporation of Poly(Catechol-Amine)-Modified Boron Nitride Nanotubes

Pornea,

Dinh,

Hanif

et al. 2024

Nanomaterials

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As one of the emerging nanomaterials, boron nitride nanotubes (BNNTs) provide promising opportunities for diverse applications due to their unique properties, such as high thermal conductivity, immense inertness, and high-temperature durability, while the instability of BNNTs due to their high surface induces agglomerates susceptible to the loss of their advantages. Therefore, the proper functionalization of BNNTs is crucial to highlight their fundamental characteristics. Herein, a simplistic low-cost approach of BNNT surface modification through catechol-polyamine (CAPA) interfacial polymerization is postulated to improve its dispersibility on the polymeric matrix. The modified BNNT was assimilated as a filler additive with AlN/Al2O3 filling materials in a PDMS polymeric matrix to prepare a thermal interface material (TIM). The resulting composite exhibits a heightened isotropic thermal conductivity of 8.10 W/mK, which is a ~47.27% increase compared to pristine composite 5.50 W/mK, and this can be ascribed to the improved BNNT dispersion forming interconnected phonon pathways and the thermal interface resistance reduction due to its augmented compatibility with the polymeric matrix. Moreover, the fabricated composite manifests a fire resistance improvement of ~10% in LOI relative to the neat composite sample, which can be correlated to the thermal stability shift in the TGA and DTA data. An enhancement in thermal permanence is stipulated due to a melting point (Tm) shift of ∼38.5 °C upon the integration of BNNT-CAPA. This improvement can be associated with the good distribution and adhesion of BNNT-CAPA in the polymeric matrix, integrated with its inherent thermal stability, good charring capability, and free radical scavenging effect due to the presence of CAPA on its surface. This study offers new insights into BNNT utilization and its corresponding incorporation into the polymeric matrix, which provides a prospective direction in the preparation of multifunctional materials for electric devices.

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Vertically Aligned Carbon Fiber/Aluminum Particle/Silicone Rubber Composites with High Thermal Conduction and Desired Mechanical Performance

Li,

Lei,

Chen

2024

Ind. Eng. Chem. Res.

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To utilize the highly thermally conductive axial direction of 1-dimensional carbon fibers (CFs), numerous endeavors have been devoted to the orientation engineering of CF-filled thermally conductive composites. However, the construction of thermal transfer pathways between the aligned CFs is often neglected, which inevitable leads to great thermal resistances that affect the thermal conductivity (TC) of prepared composites. Here, we proposed a facile and scalable strategy to drastically increase the through-plane TC of vertically aligned CF/silicone rubber (V-CF/SR) composites by embedding aluminum (Al) particles into the channels between the aligned CFs during the infiltration process. The V-CF/SR composites embedded with Al particles (V-CF/Al/SR) were fabricated via electrostatic flocking of CFs followed by the infiltration of the Al/SR slurry and curing. Thanks to the vertically aligned CFs bridged by Al particles to form synergistic thermal transfer pathways, the prepared V-CF/Al/SR composites achieved a high through-plane TC of 12.32 W/m K at a low CF content of 19.42 wt % and Al loading of 52.36 wt %, which is 102.5 times higher than that of pure SR. Besides, the V-CF/Al/SR composites maintained desired flexibility, elasticity, and mechanical hardness. Considering that an excellent thermal transfer ability and good mechanical properties have been obtained, the V-CF/Al/SR composites show huge potential in advanced thermal management.

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Dry-Contact Thermal Interface Material with the Desired Bond Line Thickness and Ultralow Applied Thermal Resistance

Cited by 4 publications

References 49 publications

Fabrication and Characterization of Al2O3-Siloxane Composite Thermal Pads for Thermal Interface Materials

Fabrication and Characterization of Al2O3-Siloxane Composite Thermal Pads for Thermal Interface Materials

Preparations and Thermal Properties of PDMS-AlN-Al2O3 Composites through the Incorporation of Poly(Catechol-Amine)-Modified Boron Nitride Nanotubes

Vertically Aligned Carbon Fiber/Aluminum Particle/Silicone Rubber Composites with High Thermal Conduction and Desired Mechanical Performance

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