Design of network Al2O3 spheres for significantly enhanced thermal conductivity of polymer composites

Ouyang, Yuge; Ding, Fei; Bai, Lin; Li, Xiaofei; Hou, Guolin; Fan, Junmei; Yuan, Fangli

doi:10.1016/j.compositesa.2019.105673

Cited by 83 publications

(35 citation statements)

References 48 publications

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“…The components used in the preparation of the composites and the cell morphology of the material influenced the prepared specimens' conductivity. The thermal conductivity of PVC is 0.21 W/mK, [42] ATH is 36 W/mK, [43] and cement between 0.5 and 0.6 W/ mK, [44] that is, individually, the loads (cement, ATH, and PVC) present thermal conductivity superior to PU foam which is about 0.015 W/mK, [22,45,46] corroborating for the increase of thermal conductivity in the specimens concerning PU foams.…”

Section: Thermal Conductivitymentioning

confidence: 80%

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

et al. 2021

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In the construction industry, the large number of residues presents a challenge for recycling and the possibility of producing new materials. This study reported the effects of the addition of polyvinyl chloride (PVC) residues and cement/alumina trihydrate on the production of a fire-resistant thermalacoustic insulation material. The composites were verified by scanning electron microscopy, the polyurethane (PU) cells were maintained with the addition of PVC, cement, and trihydrate alumina. The reduction in compressive strength for boards with 50% PVC waste as a replacement for the PU raw material. The boards showed the composites' conductivity coefficient was lower than that of the perforated brick and combustion deceleration up to flame extinction in the flammability test (UL94) because of the PVC/cement/ alumina trihydrate. They also presented cost savings (~57%) and carbon dioxide emissions (~49%) from the raw material, contributing to developing a less predatory and socio-environmentally responsible industry.

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Section: Thermal Conductivitymentioning

confidence: 80%

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

et al. 2021

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“…Through the compact network structure of continuous thermally conductive fillers, the effect of phonon scattering can be reduced which in turn reduces the interfacial thermal resistance thereby achieving higher thermal conductivity. On the other hand, it also provides continuous heat conduction paths in multiple dimensions and allows heat energy transfer throughout the network [ 31 ]. Indeed, these methods have their merits, however, some are time-consuming and complicated, limiting their use in large-scale industrial manufacturing and practical applications [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Generation of Self-Assembled 3D Network in TPU by Insertion of Al2O3/h-BN Hybrid for Thermal Conductivity Enhancement

Chi

et al. 2021

Materials

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Thermal management has become one of the crucial factors in designing electronic equipment and therefore creating composites with high thermal conductivity is necessary. In this work, a new insight on hybrid filler strategy is proposed to enhance the thermal conductivity in Thermoplastic polyurethanes (TPU). Firstly, spherical aluminium oxide/hexagonal boron nitride (ABN) functional hybrid fillers are synthesized by the spray drying process. Then, ABN/TPU thermally conductive composite material is produced by melt mixing and hot pressing. Then, ABN/TPU thermally conductive composite material is produced by melt mixing and hot pressing. Our results demonstrate that the incorporation of spherical hybrid ABN filler assists in the formation of a three-dimensional continuous heat conduction structure that enhances the thermal conductivity of the neat thermoplastic TPU matrix. Hence, we present a valuable method for preparing the thermal interface materials (TIMs) with high thermal conductivity, and this method can also be applied to large-scale manufacturing.

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“…Al 2 O 3 has low price, high thermal conductivity (36 W) and excellent insulation properties (>10 14 ), so it is often used as a thermally conductive filler. And it is widely used in the fields of thermal conductivity and insulation that require insulation performance such as electronic appliances 22–25 . Since Al 2 O 3 is spherical and has a smooth surface, there are few contact points between each other when inside the composite material.…”

Section: Introductionmentioning

confidence: 99%

Multi‐contact hybrid thermal conductive filler Al₂O₃@AgNPs optimized three‐dimensional thermal network for flexible thermal interface materials

Huang

Drummer

et al. 2021

J of Applied Polymer Sci

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In this work, a multi‐contact Al2O3@AgNPs hybrid thermal conductive filler was synthesized by in‐situ growth method to fill high thermal conductivity polydimethylsiloxane (PDMS)‐based composites to prepare TIMs. And the thermal conductivity, electrical conductivity, and mechanical properties of the composite materials were studied. During the synthesis process of the multi‐contact hybrid filler, different concentrations of silver ions were reduced to generate silver nanoparticles and attached to the surface of Al2O3. Al2O3@AgNPs/PDMS thermally conductive composites were prepared by changing the filler addition. Using SEM, XPS, and XRD is used to characterize the morphology and chemical composition of Al2O3@AgNPs hybrid filler. The thermal conductivity of PDMS‐based composites with different AgNPs content under 70 wt% filler loading was studied. The results show that the thermal conductivity of PDMS‐based composites filled with 7owt%Al2O3@3AgNPs/PDMS multi‐contact hybrid filler is 0.67 W/m·K, which is 3.72 times that of pure PDMS, and is higher than that of unmodified Al2O3 with the same addition amount. /PDMS composite material has a high thermal conductivity of 24%. This work provides a new idea for the design and manufacture of high thermal conductivity hybrid fillers for TIMs.

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Design of network Al2O3 spheres for significantly enhanced thermal conductivity of polymer composites

Cited by 83 publications

References 48 publications

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

Generation of Self-Assembled 3D Network in TPU by Insertion of Al2O3/h-BN Hybrid for Thermal Conductivity Enhancement

Multi‐contact hybrid thermal conductive filler Al₂O₃@AgNPs optimized three‐dimensional thermal network for flexible thermal interface materials

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Design of network Al2O3 spheres for significantly enhanced thermal conductivity of polymer composites

Cited by 83 publications

References 48 publications

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

Generation of Self-Assembled 3D Network in TPU by Insertion of Al2O3/h-BN Hybrid for Thermal Conductivity Enhancement

Multi‐contact hybrid thermal conductive filler Al2O3@AgNPs optimized three‐dimensional thermal network for flexible thermal interface materials

Contact Info

Product

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About

Multi‐contact hybrid thermal conductive filler Al₂O₃@AgNPs optimized three‐dimensional thermal network for flexible thermal interface materials