TY - JOUR
T1 - In-situ fabrication of hetero-structured fillers to significantly enhance thermal conductivities of silicone rubber composite films
AU - Ruan, Kunpeng
AU - Yan, Han
AU - Zhang, Sijie
AU - Shi, Xuetao
AU - Guo, Yongqiang
AU - Gu, Junwei
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/7/7
Y1 - 2021/7/7
N2 - With the method of precipitation followed by high temperature calcination, hetero-structured fillers boron nitride nanosheets@alumina (BNNS@Al2O3) were in-situ fabricated. Thereafter, thermally conductive & insulating BNNS@Al2O3/silicone rubber (SR) composite films were then prepared. The “point-surface” hetero-structured fillers BNNS@Al2O3 had more significant thermal conductivity coefficient (λ) improvement than single Al2O3, BNNS and directly blending BNNS/Al2O3 fillers. With the mass fraction of BNNS@Al2O3 to be 30 wt% (BNNS/Al2O3, 1:1, wt:wt), the in-plane λ (λ∥) and through-plane λ (λ⊥) of the BNNS@Al2O3/SR composite films attained 2.78 W/mK and 0.84 W/mK, 1.75 times higher than λ∥ (1.01 W/mK) and 3.0 times higher than λ⊥ (0.21 W/mK) of pure SR, also more excellent than BNNS/SR (λ∥ = 2.46 W/mK, λ⊥ = 0.76 W/mK), Al2O3/SR (λ∥ = 1.58 W/mK, λ⊥ = 0.50 W/mK) and directly blending (BNNS/Al2O3)/SR (λ∥ = 2.04 W/mK, λ⊥ = 0.62 W/mK) composite films under the same mass fraction of fillers. Also, BNNS@Al2O3/SR composite films presented wonderful mechanical, insulation as well as thermal properties.
AB - With the method of precipitation followed by high temperature calcination, hetero-structured fillers boron nitride nanosheets@alumina (BNNS@Al2O3) were in-situ fabricated. Thereafter, thermally conductive & insulating BNNS@Al2O3/silicone rubber (SR) composite films were then prepared. The “point-surface” hetero-structured fillers BNNS@Al2O3 had more significant thermal conductivity coefficient (λ) improvement than single Al2O3, BNNS and directly blending BNNS/Al2O3 fillers. With the mass fraction of BNNS@Al2O3 to be 30 wt% (BNNS/Al2O3, 1:1, wt:wt), the in-plane λ (λ∥) and through-plane λ (λ⊥) of the BNNS@Al2O3/SR composite films attained 2.78 W/mK and 0.84 W/mK, 1.75 times higher than λ∥ (1.01 W/mK) and 3.0 times higher than λ⊥ (0.21 W/mK) of pure SR, also more excellent than BNNS/SR (λ∥ = 2.46 W/mK, λ⊥ = 0.76 W/mK), Al2O3/SR (λ∥ = 1.58 W/mK, λ⊥ = 0.50 W/mK) and directly blending (BNNS/Al2O3)/SR (λ∥ = 2.04 W/mK, λ⊥ = 0.62 W/mK) composite films under the same mass fraction of fillers. Also, BNNS@Al2O3/SR composite films presented wonderful mechanical, insulation as well as thermal properties.
KW - Flexible composites
KW - Polymer-matrix composites (PMCs)
KW - Thermal properties
UR - http://www.scopus.com/inward/record.url?scp=85104656513&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2021.108799
DO - 10.1016/j.compscitech.2021.108799
M3 - 文章
AN - SCOPUS:85104656513
SN - 0266-3538
VL - 210
JO - Composites Science and Technology
JF - Composites Science and Technology
M1 - 108799
ER -