Ultrahigh-Aspect-Ratio Boron Nitride Nanosheets Leading to Superhigh In-Plane Thermal Conductivity of Foldable Heat Spreader
文献类型：期刊论文
| 作者 | Yan, Qingwei; Dai, Wen; Gao, Jingyao; Tan, Xue; Lv, Le; Ying, Junfeng; Lu, Xiaoxin; Lu, Jibao; Yao, Yagang; Wei, Qiuping |
| 刊名 | ACS NANO
 |
| 出版日期 | 2021 |
| 卷号 | 15期号:4页码:6489-6498 |
| 关键词 | SCALABLE EXFOLIATION POLYMER COMPOSITES GRAPHENE LAYER FILM MANAGEMENT GRAPHITE STRATEGY |
| 英文摘要 | The rapid development of integrated circuits and electronic devices creates a strong demand for highly thermally conductive yet electrically insulating composites to efficiently solve hot spot problems during device operation. On the basis of these considerations, hexagonal boron nitride nanosheets (BNNS) have been regarded as promising fillers to fabricate polymer matrix composites. However, so far an efficient approach to prepare ultrahigh-aspect-ratio BNNS with large lateral size while maintaining an atomically thin nature is still lacking, seriously restricting further improvement of the thermal conductivity for BNNS/polymer composites. Here, a rapid and high-yield method based on a microfluidization technique is developed to obtain exfoliated BNNS with a record high aspect ratio of approximate to 1500 and a low degree of defects. A foldable and electrically insulating film made of such a BNNS and poly(vinyl alcohol) (PVA) matrix through filtration exhibits an in-plane thermal conductivity of 67.6 W m(-1) K-1 at a BNNS loading of 83 wt %, leading to a record high value of thermal conductivity enhancement (approximate to 35 500). The composite film then acts as a heat spreader for heat dissipation of high-power LED modules and shows superior cooling efficiency compared to commercial flexible copper clad laminate. Our findings provide a practical route to produce electrically insulating polymer composites with high thermal conductivity for thermal management applications in modern electronic devices. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21993]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | 1.Lu, JB (corresponding author), Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen 518055, Peoples R China. 2.Chen, D (corresponding author), Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China. 3.Lin, CT (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn NIMTE, Key Lab Marine Mat & Related Technol, Zhejiang Key Lab Marine Mat & Protect Technol, Ningbo 315201, Peoples R China. 4.Lin, CT (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China. 5.Lu, JB (corresponding author), Shenzhen Inst Adv Elect Mat, Shenzhen 518103, Peoples R China. 6.Chen, D (corresponding author), Hunan Univ, State Key Lab Adv Design & Mfg Vehicle Body, Coll Mech & Vehicle Engn, Changsha 410082, Hunan, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Yan, Qingwei,Dai, Wen,Gao, Jingyao,et al. Ultrahigh-Aspect-Ratio Boron Nitride Nanosheets Leading to Superhigh In-Plane Thermal Conductivity of Foldable Heat Spreader[J]. ACS NANO,2021,15(4):6489-6498. |
| APA | Yan, Qingwei.,Dai, Wen.,Gao, Jingyao.,Tan, Xue.,Lv, Le.,...&Lin, Cheng-Te.(2021).Ultrahigh-Aspect-Ratio Boron Nitride Nanosheets Leading to Superhigh In-Plane Thermal Conductivity of Foldable Heat Spreader.ACS NANO,15(4),6489-6498. |
| MLA | Yan, Qingwei,et al."Ultrahigh-Aspect-Ratio Boron Nitride Nanosheets Leading to Superhigh In-Plane Thermal Conductivity of Foldable Heat Spreader".ACS NANO 15.4(2021):6489-6498. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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