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通过真空过滤结合热压制备的多壁碳纳米管/聚乙烯醇复合纸的多功能特性:热学、电学和电磁屏蔽特性

Multi-Functional Properties of MWCNT/PVA Buckypapers Fabricated by Vacuum Filtration Combined with Hot Press: Thermal, Electrical and Electromagnetic Shielding.

作者信息

Cao Liyang, Liu Yongsheng, Wang Jing, Pan Yu, Zhang Yunhai, Wang Ning, Chen Jie

机构信息

Science and Technology on Thermostructural Composites Materials Laboratory, Northwestern Polytechnical University, Xi'an 710072, China.

NPU-SAS Joint Research Center of Advanced Ceramics, Northwestern Polytechnical University, Xi'an 710072, China.

出版信息

Nanomaterials (Basel). 2020 Dec 14;10(12):2503. doi: 10.3390/nano10122503.

DOI:10.3390/nano10122503
PMID:33327367
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7764874/
Abstract

The applications of pure multi-walled carbon nanotubes (MWCNTs) buckypapers are still limited due to their unavoidable micro/nano-sized pores structures. In this work, polyvinyl alcohol (PVA) was added to a uniform MWCNTs suspension to form MWCNT/PVA buckypapers by vacuum infiltration combined with a hot press method. The results showed an improvement in the thermal, electrical, and electromagnetic interference (EMI) shielding properties due to the formation of dense MWCNTs networks. The thermal and electrical properties rose from 1.394 W/m·k to 2.473 W/m·k and 463.5 S/m to 714.3 S/m, respectively. The EMI performance reached 27.08 dB. On the other hand, ABAQUS finite element software was used to simulate the coupled temperature-displacement performance. The electronic component module with buckypapers revealed a homogeneous temperature and thermal stress distribution. In sum, the proposed method looks promising for the easy preparation of multi-functional nanocomposites at low-cost.

摘要

由于纯多壁碳纳米管(MWCNTs)巴基纸不可避免地存在微/纳米尺寸的孔隙结构,其应用仍然有限。在这项工作中,将聚乙烯醇(PVA)添加到均匀的MWCNTs悬浮液中,通过真空渗透结合热压法形成MWCNT/PVA巴基纸。结果表明,由于形成了致密的MWCNTs网络,其热、电和电磁干扰(EMI)屏蔽性能得到了改善。热性能和电性能分别从1.394W/m·k提高到2.473W/m·k和从463.5S/m提高到714.3S/m。EMI性能达到27.08dB。另一方面,使用ABAQUS有限元软件模拟温度-位移耦合性能。带有巴基纸的电子元件模块显示出均匀的温度和热应力分布。总之,所提出的方法对于低成本轻松制备多功能纳米复合材料看起来很有前景。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/c118cca14358/nanomaterials-10-02503-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/9022708b4af9/nanomaterials-10-02503-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/41a32b5ae994/nanomaterials-10-02503-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/925dd5906030/nanomaterials-10-02503-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/dafd2a4887a8/nanomaterials-10-02503-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/3b373cde1f46/nanomaterials-10-02503-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/eb4cba1e148f/nanomaterials-10-02503-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/5166b9941d7a/nanomaterials-10-02503-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/b9b1d2fd8040/nanomaterials-10-02503-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/c118cca14358/nanomaterials-10-02503-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/9022708b4af9/nanomaterials-10-02503-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/41a32b5ae994/nanomaterials-10-02503-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/925dd5906030/nanomaterials-10-02503-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/dafd2a4887a8/nanomaterials-10-02503-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/3b373cde1f46/nanomaterials-10-02503-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/eb4cba1e148f/nanomaterials-10-02503-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/5166b9941d7a/nanomaterials-10-02503-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/b9b1d2fd8040/nanomaterials-10-02503-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/85a6/7764874/c118cca14358/nanomaterials-10-02503-g009.jpg

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