Simultaneous improvement in thermal conductivity and flame retardancy of epoxy resin via constructing 3D BNNS skeleton with assistance of ammonium polyphosphate

Xue, Peiwen; Cheng, Yajie; Wang, Yong; Han, Gaojie; Zhou, Bing; He, Chengen; Liu, Chuntai; Feng, Yuezhan

doi:10.1016/j.cej.2023.145791

Chemical Engineering Journal

2023

DOI: 10.1016/j.cej.2023.145791

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Simultaneous improvement in thermal conductivity and flame retardancy of epoxy resin via constructing 3D BNNS skeleton with assistance of ammonium polyphosphate

Peiwen Xue,

Yajie Cheng,

Yong Wang

et al.

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Cited by 10 publications

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Controllable Self‐Assembly of Carbon Nanotubes on Ammonium Polyphosphate as a Game‐Changer for Flame Retardancy and Thermal Conductivity in Epoxy Resin

Xia,

Hong,

Zhang

et al. 2024

Macromol. Rapid Commun.

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The optimization of flame retardancy and thermal conductivity in epoxy resin (EP), utilized in critical applications such as mechanical components and electronics packaging, is a significant challenge. This study introduces a novel, ultrasound‐assisted self‐assembly technique to create a dual‐functional filler consisting of carbon nanotubes and ammonium polyphosphate (CNTs@APP). This method, leveraging dynamic ligand interactions and strategic solvent selection, allows for precise control over the assembly and distribution of CNTs on APP surfaces, distinguishing it from conventional blending approaches. The integration of 7.5 wt.% CNTs@APP10 into EP nanocomposites results in substantial improvements in flame retardancy, as evidenced by a limiting oxygen index (LOI) value of 31.8% and achievement of the UL‐94 V‐0 rating. Additionally, critical fire hazard indicators, including total heat release (THR), total smoke release (TSR), and the peak intensity of CO yield (PCOY), are significantly reduced by 45.9% to 77.5%. This method also leads to a remarkable 3.6‐fold increase in char yield, demonstrating its game‐changing potential over traditional blending techniques. Moreover, despite minimal CNTs addition, thermal conductivity is notably enhanced, showing a 53% increase. This study introduces a novel approach in the development of multifunctional EP nanocomposites, offering potential for wide range of applications.

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Controllable Self‐Assembly of Carbon Nanotubes on Ammonium Polyphosphate as a Game‐Changer for Flame Retardancy and Thermal Conductivity in Epoxy Resin

Xia,

Hong,

Zhang

et al. 2024

Macromol. Rapid Commun.

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Cocklebur‐Inspired Robust Non‐flammable Polymer Thermo Conductor for CPU Cooling

Wang,

Fan,

Pan

et al. 2024

Small

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Efficient computer central processing units (CPUs) heat dissipation demands polymer‐based thermal interface materials that combine high thermal conductivity with strong mechanical properties, eliminating the need for additional fasteners. However, polymers with high thermal conductivity often suffer from insufficient mechanical strength and other challenges, including high production costs, elevated interfacial thermal resistance, and flammability. Inspired by the 3D “spininess‐seeds‐bark” structure of cocklebur, cast polyurethane (PUC) composites are developed using copper ethylenediamine methylene‐phosphonate as the “spininess” and functionalized alumina microspheres as the “seeds” filler. This spininess configuration prevents organophosphate self‐polymerization, imparting self‐extinguishing properties to the polymer, while also enhancing the mechanical strength and thermal conductivity by connecting the “seeds” to the matrix. The bark‐like structure enables effective interlocking of functional particles, optimizing the synergy within the composite. The elevated surface reduces interfacial thermal resistance, leading to enhanced thermal conductivity. The resulting PUC composites demonstrate impressive performance, with a tensile strength of 15.9 MPa and thermal conductivity of 2.51 W m⁻¹ K⁻¹, providing effective continuous cooling for high‐power CPUs. These composites offer low density, broad availability, and environmental sustainability, making them promising candidates for sustainable electronics and new energy applications, aligned with global development strategies.

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Aramid nanofiber supported spherical Al2O3/BN film with high thermal conductivity and outstanding dimensional stability

Luo,

Yang,

Xue

et al. 2025

Applied Surface Science

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Simultaneous improvement in thermal conductivity and flame retardancy of epoxy resin via constructing 3D BNNS skeleton with assistance of ammonium polyphosphate

Cited by 10 publications

References 50 publications

Controllable Self‐Assembly of Carbon Nanotubes on Ammonium Polyphosphate as a Game‐Changer for Flame Retardancy and Thermal Conductivity in Epoxy Resin

Controllable Self‐Assembly of Carbon Nanotubes on Ammonium Polyphosphate as a Game‐Changer for Flame Retardancy and Thermal Conductivity in Epoxy Resin

Cocklebur‐Inspired Robust Non‐flammable Polymer Thermo Conductor for CPU Cooling

Aramid nanofiber supported spherical Al2O3/BN film with high thermal conductivity and outstanding dimensional stability

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