Controllable assembly of low-dielectric polycarbonate/boron nitride nanosheet porous aerogel composite membranes with pore-wall thermal-conductive networks
- 1College of Life Sciences, Zhuhai College of Science and Technology Zhuhai 519041 China
- 2Goertek College of Science and Technology Industry, Weifang University Weifang Shandong 261061 China
Abstract
The rapid advancement of fifth-/sixth-generation (5G/6G) telecommunications and high-density packaging has intensified the power-density crisis, creating a critical trade-off between thermal management and ultra-low dielectric requirements for substrate materials. Herein, we propose a controllable assembly strategy integrating polycarbonate (PC)-assisted ball-milling exfoliation with non-solvent-induced phase separation (NIPS). PC chains non-covalently exfoliate hexagonal boron nitride (h-BN) into boron nitride nanosheets (BNNS; average lateral dimension ∼636 nm, thickness ∼2.0 nm, 3–7 layers) while simultaneously functionalizing the surface. A one-step volatile phase separation in a dichloromethane/isopropanol dual-solvent system constructs porous aerogel membranes featuring a dual-network architecture: an interpenetrating porous scaffold with pore-wall thermal-conductive networks. At 30 wt% BNNS loading, the composite membrane achieves in-plane and through-plane thermal conductivities of 0.30 and 0.25 W m−1 K−1, respectively, representing a threefold enhancement over pristine PC aerogel. Concurrently, the dielectric constant reaches 1.25 at 106 Hz with a loss tangent of 0.009, and the tensile stress of 12.55 MPa ensures mechanical integrity. By decoupling thermal transport through pore-wall BNNS percolation networks from dielectric response via air-phase dilution, this strategy enables concurrent high thermal conductivity, ultra-low permittivity, and robust mechanical performance in a lightweight thermoplastic platform.
Related
- Poly(3,4-ethylenedioxythiophene)@Siloxene Nanosheet Composite Electrodes for High-Stability Flexible Supercapacitors
- Dual influence of aluminum doping on the dielectric and conductive mechanisms of BaTiO3
- Hierarchical sandwich composite film with engineered interfaces for concurrent high-frequency ultra-low dielectric constant and high thermal conductivity
- Thermally Conductive Enhanced Composite Phase Change Materials for Improving Thermal Safety of Lithium-Ion Batteries
- Tape-Casting BaTiO3/P(VDF-TrFE) Piezoelectric Composite Films with Optimized Ferroelectric–Dielectric Performances for Wearable Human Motion Monitoring
BibTeX
@article{xu2026controllable,
title = {{Controllable assembly of low-dielectric polycarbonate/boron nitride nanosheet porous aerogel composite membranes with pore-wall thermal-conductive networks}},
author = {Lanshu Xu and Haohan Chen and Zhiqing He and Yixiao Zhang and En Deng and Junming Peng and Chengming Wang and Yiqiang Huang and Xiue Ren and Linlin Cui},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra04564b},
url = {https://europepmc.org/article/PMC/PMC13721904},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Controllable assembly of low-dielectric polycarbonate/boron nitride nanosheet porous aerogel composite membranes with pore-wall thermal-conductive networks
AU - Lanshu Xu
AU - Haohan Chen
AU - Zhiqing He
AU - Yixiao Zhang
AU - En Deng
AU - Junming Peng
AU - Chengming Wang
AU - Yiqiang Huang
AU - Xiue Ren
AU - Linlin Cui
PY - 2026
DA - 2026/10/30
JO - RSC advances
DO - 10.1039/d6ra04564b
UR - https://europepmc.org/article/PMC/PMC13721904
AB - The rapid advancement of fifth-/sixth-generation (5G/6G) telecommunications and high-density packaging has intensified the power-density crisis, creating a critical trade-off between thermal management and ultra-low dielectric requirements for substrate materials. Herein, we propose a controllable assembly strategy integrating polycarbonate (PC)-assisted ball-milling exfoliation with non-solvent-induced phase separation (NIPS). PC chains non-covalently exfoliate hexagonal boron nitride (h-BN) into boron nitride nanosheets (BNNS; average lateral dimension ∼636 nm, thickness ∼2.0 nm, 3–7 layers) while simultaneously functionalizing the surface. A one-step volatile phase separation in a dichloromethane/isopropanol dual-solvent system constructs porous aerogel membranes featuring a dual-network architecture: an interpenetrating porous scaffold with pore-wall thermal-conductive networks. At 30 wt% BNNS loading, the composite membrane achieves in-plane and through-plane thermal conductivities of 0.30 and 0.25 W m−1 K−1, respectively, representing a threefold enhancement over pristine PC aerogel. Concurrently, the dielectric constant reaches 1.25 at 106 Hz with a loss tangent of 0.009, and the tensile stress of 12.55 MPa ensures mechanical integrity. By decoupling thermal transport through pore-wall BNNS percolation networks from dielectric response via air-phase dilution, this strategy enables concurrent high thermal conductivity, ultra-low permittivity, and robust mechanical performance in a lightweight thermoplastic platform.
SN - 2046-2069
ER -