Preparation of highly thermally conductive but electrically insulating composites by constructing a segregated double network in polymer composites

材料科学 复合材料 热导率 导电体 填料(材料) 复合数 氮化硼 电阻率和电导率 石墨烯 聚合物 造型(装饰) 电导率 导电的 环氧树脂 碳纳米管 纳米技术 化学 物理化学 工程类 电气工程
作者
Xiang Zhang,Dongping Sun,Yuhang Liu,Bowen Yu,Qin Zhang,Feng Chen,Qiang Fu
出处
期刊:Composites Science and Technology [Elsevier BV]
卷期号:175: 135-142 被引量:49
标识
DOI:10.1016/j.compscitech.2019.03.017
摘要

Abstract Thermally conductive but electrically insulating polymer composites have drawn much attention in various applications including thermal management, electronic packing, etc. Herein, a facile method of preparing polymer composites with both excellent thermal conductivity and electrical insulation is reported. To do this, nylon 6 (PA6)/Graphene nanoplatelets (GNPs) composites were firstly prepared via melt blending, then smashed into micron particles and coated with hexagonal boron nitride (h-BN) powder via VAE resin, finally hot compress molding to form composites. Thus depending on the content of GNPs inside PA6 particles and the content of h-BN coated on the particles, the thermal and electrical conductivity of the composites could be well controlled. For instance, at the total content of fillers is 18.82 vol%, with 1.97 vol% GNPs insides PA particles and 16.85 vol% h-BN coated on the surface, almost ten times improvement of thermal conductivity (from 0.29 to 2.69 W m−1k−1) has been achieved, while still maintain an excellent electrical insulating (as low as 4.13 × 10−9 S/m). It is proposed that this double segregated filler network could provide synergistic enhancement for the thermal conductivity, while the electrical conductivity caused by GNPs could be largely cut off by h-BN filler network. More importantly, this unique structure could be well preserved even after the sample thickness was decreased into a thin film, resulting in a further increase of thermal conductivity (up to 8.96 W m−1k−1) in the flow direction. Since various thermoplastic polymers can be chosen as matrix, and different filler combination can be adopted to construct thermal conductive synergistic and electrical insulating, we believe that this work provides a facial method to fabricate highly thermally conductive composites with a low electrical conductivity.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
刚刚
孟欣玥完成签到,获得积分10
刚刚
安安完成签到 ,获得积分10
1秒前
cyanpomelo完成签到,获得积分10
2秒前
wbh发布了新的文献求助10
3秒前
孟欣玥发布了新的文献求助10
3秒前
研友_VZG7GZ应助KK采纳,获得10
4秒前
4秒前
yar给迅速蜻蜓的求助进行了留言
5秒前
6秒前
6秒前
风趣的新波完成签到,获得积分10
6秒前
jo完成签到,获得积分10
7秒前
舒服的白云完成签到,获得积分10
7秒前
zou完成签到,获得积分10
7秒前
忆茶戏发布了新的文献求助10
8秒前
酷波er应助幸运星采纳,获得10
10秒前
华仔应助张雯思采纳,获得10
10秒前
CipherSage应助张雯思采纳,获得30
10秒前
星辰大海应助张雯思采纳,获得10
10秒前
搜集达人应助张雯思采纳,获得10
10秒前
10秒前
田様应助Cl1audia采纳,获得10
10秒前
123发布了新的文献求助10
11秒前
11秒前
搜集达人应助Ma采纳,获得10
11秒前
大模型应助孟欣玥采纳,获得10
11秒前
木可发布了新的文献求助10
12秒前
泊頔完成签到,获得积分10
14秒前
lrq发布了新的文献求助10
15秒前
15秒前
wwl关闭了wwl文献求助
17秒前
mr_chxb82发布了新的文献求助10
17秒前
阿智完成签到,获得积分10
17秒前
大写的LV完成签到 ,获得积分10
18秒前
麦子发布了新的文献求助10
19秒前
852应助wbh采纳,获得10
20秒前
24秒前
lzx发布了新的文献求助10
25秒前
王彩香发布了新的文献求助10
26秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989444
求助须知:如何正确求助?哪些是违规求助? 3531531
关于积分的说明 11254250
捐赠科研通 3270191
什么是DOI,文献DOI怎么找? 1804901
邀请新用户注册赠送积分活动 882105
科研通“疑难数据库(出版商)”最低求助积分说明 809174