TY  - JOUR
AU  - Wang, Yaoqi
AU  - Ruan, Kunpeng
AU  - Li, Mukun
AU  - Guo, Yongqiang
AU  - He, Mukun
AU  - Guo, Hua
AU  - Shi, Xuetao
AU  - Qiu, Hua
AU  - Song, Ping
AU  - Gu, Junwei
PY  - 2025
TI  - Horizontal array of BNNS@Ni for polydimethylsiloxane composites with high in-plane thermal conductivities and excellent photo-thermal performances
JO  - Nano Research
SN  - 1998-0124
SP  - 94907700
VL  - 18
IS  - 8
AB  - The directional arrangement of two-dimensional thermally conductive fillers can fully exploit their anisotropic advantages and form efficient thermal conduction paths within the composites, thereby significantly improving their thermal conduction efficiency. In this study, “point-surface” hetero-structured boron nitride nanosheets (BNNS)@Ni thermally conductive fillers with magnetic response are synthesized via in-situ growth and high-temperature carbonization. The H-BNNS@Ni/PDMS (BNNS@Ni horizontally arranged in the polydimethylsiloxane (PDMS) matrix) thermally conductive composites are fabricated via magnetic field orientation. When the mass ratio of BNNS to Ni in BNNS@Ni is 8:1 and the mass fraction of BNNS@Ni is 50 wt.%, the in-plane thermal conductivity (λ∥) of H-BNNS@Ni/PDMS thermally conductive composites reaches 5.50 W/(m·K), which is 27.8 times higher than that of pure PDMS (0.19 W/(m·K)), and is also significantly higher than that of R-BNNS@Ni/PDMS (BNNS@Ni randomly distributed in the PDMS matrix) thermally conductive composites (4.76 W/(m·K)) with the same mass fraction of BNNS@Ni. H-BNNS@Ni/PDMS thermally conductive composites can reduce the operating temperature at full power by 19.2 °C compared to pure PDMS when used for CPU cooling. Meanwhile, H-BNNS@Ni/PDMS thermally conductive composites also exhibit excellent thermal resistance, photothermal conversion performance, and hydrophobicity.
UR  - https://doi.org/10.26599/NR.2025.94907700
DO  - 10.26599/NR.2025.94907700