Enhanced thermal conductivity of electrically insulating polydimethylsiloxane composites with boron nitride nanosheet and aluminum oxide for thermal management on flexible electronics

Polymer Composites, Journal Year: 2023, Volume and Issue: 45(5), P. 4473 - 4486

Published: Dec. 27, 2023

Abstract With the trend of integration and miniaturization stretchable electronics, thermal management has been a crucial issue. Developing novel materials with high conductivity (TC) flexibility is urgent. Herein, we report polydimethylsiloxane (PDMS)/boron nitride nanosheet (BNNS)@spherical aluminum oxide (Al 2 O 3 ) composite TC electrical insulation prepared by two‐step strategy sucrose‐template hot‐pressing. An effective foam‐pressing route benefits composites to form three‐dimensional thermally conductive networks, improving in‐plane value resultant 4.03 W/(mK) at filler mass fraction 35.7 wt% enhancing 4.66 under 40% stretching ratio. Meanwhile, can be restored their former state retain stability repeated bending twisting tests. Moreover, were applied in LED stretching, exhibiting good heat dissipation performance. These results demonstrate this PDMS potentially utilized as high‐performance material solve problems flexible electronics. Highlights The conduction network BNNS@P‐Al fillers are self‐assembled via electrostatic interaction. exhibit superior flexibility. increases after stretching. deformation.

Language: Английский

---

Facile synthesis of functionalized boron nitride nanosheets for photo‐cured 3D printing of high thermal conductive composites

Polymer Composites, Journal Year: 2023, Volume and Issue: 45(4), P. 3156 - 3168

Published: Dec. 2, 2023

Abstract Addressing the concern of heat accumulation in electronic devices, considerable research efforts have been dedicated to develop composites that are thermally conductive yet electrically insulative. Incorporating hexagonal boron nitride (h‐BN) as fillers shows promise enhancing thermal conductivity polymer composites. However, notable challenges arise from difficulties achieving well dispersion and establishing efficient three‐dimensional networks. This work demonstrated an photocurable direct ink writing (DIW) printing method fabricate functional h‐BN nanosheets (A‐BNNS)/epoxy acrylate (EA) resin‐based (A‐BNNS/EA). Apple polyphenol‐assisted ball milling was employed functionalized BN (A‐BNNS). Subsequently, A‐BNNS/EA inks were 3D printed using DIW create composites, which then UV‐cured. The composite containing 55 wt% A‐BNNS impressive (TC) 3.44 W/(m K). utilization technology enables onion‐like within matrix, effectively constructing contribution significantly enhances overall conductivity. Highlights BNNS (A‐BNNS) achieved by apple milling. for producing high materials efficient. exhibited distribution constructed a network matrix demonstrate excellent favorable dissipation property.

Language: Английский

---

Enhanced dielectric properties of poly(vinylidene fluoride) matrix nanocomposites incorporated with one–dimensional structure of titanate nanotubes

Materialia, Journal Year: 2024, Volume and Issue: 33, P. 102013 - 102013

Published: Jan. 9, 2024

Language: Английский

---

Effect of Sodium Dodecyl Sulfate on the dielectric and electrical properties of Poly (vinylidene fluoride)-Zinc Ferrite Composites

Journal of Molecular Structure, Journal Year: 2024, Volume and Issue: 1321, P. 139782 - 139782

Published: Aug. 24, 2024

Language: Английский

---