Fabrication of Thermally Conductive and Wear-Resistant UHMWPE-Based Composites for Nuclear Shielding Applications DOI

Xiaopei Sun,

Xiaoqiang Pan,

Ying Wu

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(25), P. 11030 - 11043

Published: June 11, 2024

Polymer-based shielding materials have garnered attention due to their lightweightness, ease of fabrication, and tailorable performance. However, they tend creep deform when the are exposed external heat, which may cause a catastrophic disaster mechanical failure. In this study, hybrid loading graphite (Gt) boron nitride (BN) fillers was used improve thermal dissipation, neutron shielding, tribological properties ultrahigh molecular weight polyethylene (UHMWPE), demonstrate potential applications in nuclear sectors among others. The results revealed that conductivity UHMWPE/BN 30 wt %/Gt 40 % composite (i.e., BN30Gt40) reached as high 8.43 W/mK, 295% higher than %, 201% UHMWPE/Gt 1700% pure UHMWPE, respectively. Simulation analysis using Geant4 suggested UHMWPE/BN/Gt composites exhibited excellent neutron-shielding performance presence abundant hydrogen elements. addition, demonstrated friction wear combined effects constructing transfer film on surface pair timely removal frictional heat generated at sliding interface.

Language: Английский

High intrinsic thermal conductivity and low dielectric constant of liquid crystalline epoxy resins with fluorine-containing semi-IPN structures DOI
Kuan Zhang, Junliang Zhang, Lin Dang

et al.

Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Language: Английский

Citations

2
An Engineered Heterostructured Trinity Enables Fire-Safe, Thermally Conductive Polymer Nanocomposite Films with Low Dielectric Loss DOI Creative Commons
Qiang Chen,

Jiabing Feng,

Yijiao Xue

et al.

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 26, 2025

Abstract To adapt to the trend of increasing miniaturization and high integration microelectronic equipments, there is a demand for multifunctional thermally conductive (TC) polymeric films combining excellent flame retardancy low dielectric constant ( ε ). date, have been few successes that achieve such performance portfolio in polymer due their different even mutually exclusive governing mechanisms. Herein, we propose trinity strategy creating rationally engineered heterostructure nanoadditive (FG@CuP@ZTC) by situ self-assembly immobilization copper-phenyl phosphonate (CuP) zinc-3, 5-diamino-1,2,4-triazole complex (ZTC) onto fluorinated graphene (FG) surface. Benefiting from synergistic effects FG, CuP, ZTC bionic lay-by-lay (LBL) strategy, as-fabricated waterborne polyurethane (WPU) nanocomposite film with 30 wt% FG@CuP@ZTC exhibits 55.6% improvement limiting oxygen index (LOI), 66.0% 40.5% reductions peak heat release rate total release, respectively, 93.3% increase tensile strength relative pure WPU between ZTC. Moreover, presents thermal conductivity λ ) 12.7 W m −1 K 2.92 at 10 6 Hz. This work provides commercially viable rational design develop high-performance films, which hold great potential as advanced dissipators high-power-density microelectronics.

Language: Английский

Citations

2
An overview of polymer-based thermally conductive functional materials DOI Creative Commons
Zhaoyang Li, Yu Sun,

Feiyang Hu

et al.

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 1, 2024

Language: Английский

Citations

14
Highly Thermally Conductive Liquid Crystalline Epoxy Resin Vitrimers with Reconfigurable, Shape‐Memory, Photo‐Thermal, and Closed‐Loop Recycling Performance DOI Creative Commons
Fengyuan Zhang, Junliang Zhang, Kuan Zhang

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 22, 2024

Abstract The low thermal conductivity, poor toughness, and non‐reprocessability of thermosetting epoxy resins severely restrict their applications sustainable development in flexible electronics. Herein, liquid crystalline (LCE) dynamic ester disulfide bonds are introduced into the cured network bisphenol A resin (E‐51) to construct highly thermally conductive (LCER) vitrimers. LCER vitrimers demonstrate adjustable mechanical properties by varying ratio LCE E‐51, allowing it transition from soft strong. Typically, a 75 mol% 25 E‐51 results an in‐plane conductivity ( λ ) 1.27 W m −1 K , over double that pure vitrimer (0.61 ). tensile strength toughness increase 2.88 folds 14.1 MPa 2.45 20.1 MJ −3 respectively. Besides, phase covalent enable triple shape memory three‐dimensional reconstruction. After four reprocessing cycles, remain at 94% 72%, Integrating carbon nanotubes (CNTs) imparts photo‐thermal effect enables “on” “off” switch under near‐infrared light vitrimer. Furthermore, CNTs/LCER displays light‐induced actuation, self‐repairing, self‐welding besides closed‐loop recycling rapid degradation performance.

Language: Английский

Citations

13
Significantly enhancing the through-plane thermal conductivity of epoxy dielectrics by constructing aramid nanofiber/boron nitride three-dimensional interconnected framework DOI
Junwen Ren,

Ruichi Zeng,

Jun Yang

et al.

Journal of Applied Physics, Journal Year: 2024, Volume and Issue: 136(4)

Published: July 22, 2024

Epoxy dielectrics with high through-plane thermal conductivity (λ) hold great promise for applications in the management of advanced power electronics. Intensive attempts have been made to improve λ epoxy by filling boron nitride nanosheets (BNNSs). However, it remains a challenge achieve satisfactory increased small amount BNNS loading. Herein, we reported new strategy prepare internal three-dimensional phonon transport channels vacuum freeze-drying and impregnation. Aramid nanofibers (ANFs) BNNSs were used collaborative construction vertical interconnected framework. The resultant ANF-BNNS/epoxy achieved 0.87 W m−1 K−1 at only 1.43 vol. % BNNS, which is ∼17.1% higher than that BNNS/epoxy counterpart even 18.34 randomly distributed BNNS. increasing efficiency ANF-BNNS tenfold more conventional blending methods. In addition, composite also exhibits low dielectric constant loss. findings this study offer an inspired venue develop high-performance thermally conductive minimal

Language: Английский

Citations

11
Synergistic promotion of inter-particle and intra-particle polarizations in BST@TiO2/PVDF nanocomposites towards elevated dielectric properties DOI
Fan Zhang, Guangheng Wang, Na Lin

et al.

Composites Science and Technology, Journal Year: 2024, Volume and Issue: 251, P. 110547 - 110547

Published: March 16, 2024

Language: Английский

Citations

9
Exploring Trade-offs in Thermal Interface Materials: The Impact of Polymer-Filler Interfaces on Thermal Conductivity and Thixotropy DOI
Bin Zhang,

Zhengli Dou,

Yongzheng Zhang

et al.

Chinese Journal of Polymer Science, Journal Year: 2024, Volume and Issue: 42(7), P. 916 - 925

Published: March 18, 2024

Language: Английский

Citations

9
Vertically aligned cellulose nanofiber/carbon nanotube aerogel-infused epoxy nanocomposites for highly efficient solar-thermal-electric conversion DOI Creative Commons
Jiali Yan, Yu Sun, Tao Jia

et al.

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 214, P. 313 - 321

Published: July 20, 2024

Solar-driven thermo-electric generation (STEG) emerges as a promising solution to mitigate the global energy shortage. However, practical application of conventional photothermal materials equipped with STEG is limited due low solar thermal conversion efficiency. Herein, we fabricated an epoxy resin (EP) nanocomposite, EP/CCA80, excellent photo-thermal-electric properties by embedding vertically aligned aerogel consisting cellulose nanofibers (CNF) and carboxylated multi-walled carbon nanotubes (CMWCNTs) into transparent EP matrix. EP/CCA80 composites possessed broad light absorption range from 200 nm 2500 properties. Under illumination 1.0 kW m–2, achieved notable stable temperature 93.2°C efficiency up 54.35% only 0.65 wt% CMWCNTs inclusion. Additionally, coupled thermoelectric (TE) devices, composite facilitated significant difference voltage output 25.3°C 160.29 mV (1.0 m–2), respectively, which could power small fan rotate at speed 193 min–1. Such are poised offer viable solutions for enhancing accessibility in remote regions, thereby contributing reduction shortages environmental degradation.

Language: Английский

Citations

8
Strong and tough polyvinyl alcohol hydrogels with high intrinsic thermal conductivity DOI Open Access
Junliang Zhang,

Chenyang Tang,

Qingqing Kong

et al.

Soft Science, Journal Year: 2025, Volume and Issue: 5(1)

Published: Jan. 26, 2025

Although polyvinyl alcohol (PVA) hydrogels display huge potential in tissue engineering, flexible and wearable electronic devices soft robotics, their low intrinsic thermal conductivity weak mechanical properties severely limit wider applications these areas. Herein, a Hofmeister effect-assisted “directional freezing-stretching” tactic is employed for simultaneously enhancing the conduction of PVA hydrogels. The are obtained through directional freezing followed by salting-out treatment subsequent stretching (DFS). DFS hydrogel with 15 wt% ratio 4 (DFS4) exhibits highest 1.25 W/(m·K), which 2.4 2.8 times that prepared frozen-thawed (FT) [0.52 W/(m·K)] frozen-salted out (FS) [0.45 methods, respectively. DFS4 also possesses greatly improved performances, exhibiting an elongation at break 163.1%. In addition, tensile strength, toughness, elastic modulus significantly increase to 27.1 MPa, 25.3 MJ·m-3, 21.5 MPa from 0.4 0.32 0.07 FT hydrogels, It elucidated effect generates hydrophobic crystalline regions, while enhance chain orientation strategy. These effects synergistically contribute improvement

Language: Английский

Citations

1
Recyclable Low Dielectric Polymers with High Thermal Conductivity for Copper‐Clad Laminated Film for High‐Frequency Applications DOI Open Access

Hyeyoon Ko,

Youngjae Wi,

Jahyeon Koo

et al.

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 31, 2025

Abstract With the rapid increase in demand for next‐generation communication, development of advanced dielectric materials has become imperative. To enhance performance and reliability miniaturized electronic devices, must exhibit high thermal conductivity (λ) while simultaneously fulfilling crucial criteria such as low permittivity ( D k ) loss f ). The synthesis novel polymers (LDPs) is newly reported by integrating fused aromatic mesogens siloxane functions with silane linkers. Fused mesogenic building blocks undergo crosslinking via hydrosilylation octavinylsilsesquioxane (OVS). resulting LDPs excellent properties 1.79 a 0.004) along λ (0.89 W m −1 K cold crystallization governs their molecular packing structure, which controls electron alignment phonon transfer. A comprehensive understanding interplay between structure allows precise tuning signal transmission heat conduction polymers. Furthermore, reprocessable recyclable nature highlights potential highly effective environmentally sustainable applications.

Language: Английский

Citations

1