Enhanced thermal conductivity and self-healing property of PUDA/boron nitride micro-sheets composites with a small number of graphene nano-platelets

IF 3.8 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Shiyu Zhang, Zhihui Shang, Dongliang Ding, Xu Wang, Ya Wu, Shifeng Nian, Zhenguo Liu, Qiuyu Zhang, Yanhui Chen
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引用次数: 0

Abstract

Self-healing polyurethane diacrylate (PUDA) composites with outstanding thermal conductivity were prepared with variable boron nitride (BN) and a small number of graphene nanoplatelets (GNPs) (1 wt%). The thermal conductivity of PUDA composites containing 1 wt% GNPs and 29 wt% BN reached 1.73 W/(m·K), showing 27.2% increment compared to PUDA composites only with 30 wt% BN. BN and GNPs mutually promoted the dispersion in the PUDA matrix, and the small number of GNPs was enough to bridge the gaps between BN, so that GNPs and BN exerted a synergistic enhancement effect on the thermal conductivity of PUDA composites with a synergistic efficiency of 1.343. The PUDA composites maintained the tensile strength of 8.21 MPa with good electrical insulation (4.55 × 109 Ω cm). The high degrees of recovery of mechanical strength (>90%) and thermal conductivities (>84%) were also realised by the healing effect of the reversible DA reaction. The PUDA composites with excellent comprehensive properties show broad application potential in the thermal management of electronic devices.

Abstract Image

含有少量石墨烯纳米片的 PUDA/ 氮化硼微片复合材料的导热性和自愈合性能得到增强
利用可变氮化硼(BN)和少量石墨烯纳米颗粒(GNPs)(1 wt%)制备了具有出色导热性能的自愈合聚氨酯二丙烯酸酯(PUDA)复合材料。含有 1 wt% GNPs 和 29 wt% BN 的 PUDA 复合材料的热导率达到了 1.73 W/(m-K),与仅含有 30 wt% BN 的 PUDA 复合材料相比提高了 27.2%。BN 和 GNPs 相互促进在 PUDA 基体中的分散,少量的 GNPs 足以弥合 BN 之间的间隙,因此 GNPs 和 BN 对 PUDA 复合材料的热导率产生了协同增强效应,协同效率为 1.343。PUDA 复合材料保持了 8.21 MPa 的拉伸强度和良好的电绝缘性(4.55 × 109 Ω cm)。通过可逆 DA 反应的愈合作用,还实现了机械强度(大于 90%)和热导率(大于 84%)的高度恢复。具有优异综合性能的 PUDA 复合材料在电子设备的热管理方面具有广阔的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
IET Nanodielectrics
IET Nanodielectrics Materials Science-Materials Chemistry
CiteScore
5.60
自引率
3.70%
发文量
7
审稿时长
21 weeks
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