Intensive and thermally conductive boron nitride/aramid nanofiber composite fibers fabricated via a wet spinning technique
Derui Kong,
Jizhen Zhang,
Zihao Hou
et al.
Abstract:In response to the increasingly diverse demands for clothing, a self-cooling functional composite fiber composed of boron nitride (BN) nanosheets and aramid nanofiber (ANF) was produced by using a scalable...
“…This is due to the in-plane lattice vibration causing minimal phonon scattering during heat conduction, while inter-layer propagation encounters greater resistance [ 13 , 14 ]. To fully harness the ultra-high thermal conductivity of two-dimensional materials in-plane, researchers have combined orientation control strategies with techniques such as tape casting [ 15 ], stretching [ 16 , 17 , 18 ], ice crystal growth [ 19 , 20 ], etc., to prepare a series of thermal conductive composites [ 21 ].…”
High-performance thermally conductive composites are increasingly vital due to the accelerated advancements in communication and electronics, driving the demand for efficient thermal management in electronic packaging, light-emitting diodes (LEDs), and energy storage applications. Controlling the orderly arrangement of fillers within a polymer matrix is acknowledged as an essential strategy for developing thermal conductive composites. In this study, isotactic polypropylene/GNP (iPP/GNP) composite filament tailored for fused deposition modeling (FDM) was achieved by combining ball milling with melt extrusion processing. The rheological properties of the composites were thoroughly studied. The shear field and pressure field distributions during the FDM extrusion process were simulated and examined using Polyflow, focusing on the influence of the 3D printing processing flow field on the orientation of GNP within the iPP matrix. Exploiting the unique capabilities of FDM and through strategic printing path design, thermally conductive composites with GNPs oriented in the through-plane direction were 3D printed. At a GNP content of 5 wt%, the as-printed sample demonstrated a thermal conductivity of 0.64 W/m · K, which was 1.5 times the in-plane thermal conductivity for 0.42 W/m · K and triple pure iPP for 0.22 W/m · K. Effective medium theory (EMT) model fitting results indicated a significantly reduced interface thermal resistance in the through-plane direction compared to the in-plane direction. This work shed brilliant light on developing PP-based thermal conductive composites with arbitrarily-customized structures.
“…This is due to the in-plane lattice vibration causing minimal phonon scattering during heat conduction, while inter-layer propagation encounters greater resistance [ 13 , 14 ]. To fully harness the ultra-high thermal conductivity of two-dimensional materials in-plane, researchers have combined orientation control strategies with techniques such as tape casting [ 15 ], stretching [ 16 , 17 , 18 ], ice crystal growth [ 19 , 20 ], etc., to prepare a series of thermal conductive composites [ 21 ].…”
High-performance thermally conductive composites are increasingly vital due to the accelerated advancements in communication and electronics, driving the demand for efficient thermal management in electronic packaging, light-emitting diodes (LEDs), and energy storage applications. Controlling the orderly arrangement of fillers within a polymer matrix is acknowledged as an essential strategy for developing thermal conductive composites. In this study, isotactic polypropylene/GNP (iPP/GNP) composite filament tailored for fused deposition modeling (FDM) was achieved by combining ball milling with melt extrusion processing. The rheological properties of the composites were thoroughly studied. The shear field and pressure field distributions during the FDM extrusion process were simulated and examined using Polyflow, focusing on the influence of the 3D printing processing flow field on the orientation of GNP within the iPP matrix. Exploiting the unique capabilities of FDM and through strategic printing path design, thermally conductive composites with GNPs oriented in the through-plane direction were 3D printed. At a GNP content of 5 wt%, the as-printed sample demonstrated a thermal conductivity of 0.64 W/m · K, which was 1.5 times the in-plane thermal conductivity for 0.42 W/m · K and triple pure iPP for 0.22 W/m · K. Effective medium theory (EMT) model fitting results indicated a significantly reduced interface thermal resistance in the through-plane direction compared to the in-plane direction. This work shed brilliant light on developing PP-based thermal conductive composites with arbitrarily-customized structures.
“…Therefore, research on flexible protective materials has emerged. Traditional flexible protection composites such as aramid fiber, 6,7 carbon fiber, 8 ultra-high molecular weight polyethylene fiber 9,10 and other high-performance fibers are applied in the field of impact protection because of their high strength and modulus. The preparation usually requires the technology of sewing or hot-pressing, in combination with metal and ceramics, and impregnation by functional fillers to meet the protection needs.…”
The safeguarding performance against complex stimuli, such as thermal shock, is very critical for the welfare of humans and equipment. Constructing multifunctional mechanical-thermal coupling protective composites through structural design remains...
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