A strong and tough polymer–carbon nanotube film for flexible and efficient electromagnetic interference shielding,Journal of Materials Chemistry C

当前位置： X-MOL 学术 › J. Mater. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

A strong and tough polymer–carbon nanotube film for flexible and efficient electromagnetic interference shielding
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-08-03 00:00:00 , DOI: 10.1039/c7tc02259j
Li-Chuan Jia _{1,

2,

3,

4,

5} , Meng-Zhu Li _{1,

2,

3,

4,

5} , Ding-Xiang Yan _{3,

5,

6,

7} , Cheng-Hua Cui _{1,

2,

3,

4,

5} , Hong-Yuan Wu _{1,

2,

3,

4,

5} , Zhong-Ming Li _{1,

2,

3,

4,

5}

Affiliation

Carbon nanotube (CNT) films exhibit potential use in broad areas including energy-storage, thermal management, and electromagnetic interference (EMI) shielding; however, their inefficient, expensive, and energy-consuming fabrication processes reported so far and mechanical brittleness are a major deficiency. Herein, a strong and tough carbon nanotube (CNT) film with the inclusion of natural rubber (NR) was fabricated for flexible and efficient EMI shielding by a facile, efficient, and energy-saving method. Compared to the pure CNT film, the incorporation of 50 wt% NR leads to a tremendous mechanical improvement of the CNT-NR films, e.g., a 3.1 and 486 times increase in tensile strength and toughness. The origin of the reinforcing and toughening effect of the CNT films by the addition of a rubber material mainly arises from enhanced stress transfer and the uniformly dispersed stress. The CNT-NR film displays excellent EMI shielding performance albeit at tiny thickness owing to the extremely high aspect ratio and electrical conductivity of CNTs. The critical thickness required to satisfy commercial EMI shielding applications (shielding effectiveness (SE) of 20 dB) is only 50 μm, and a very high EMI SE of 44.7 dB is achieved as the film thickness reaches 250 μm. Meanwhile, the CNT-NR film exhibits highly reliable EMI SE even after bending 5000 times at a radius of 2.0 mm. These intriguing properties of CNT-NR films, together with their advantages of environmentally friendly and facile large-scale fabrication, open up the possibility of designing highly thin and flexible films for promising electromagnetic protection, especially in aerospace, aviation, and next-generation flexible electronics.

中文翻译：

坚固而坚韧的聚合物-碳纳米管薄膜，可灵活有效地屏蔽电磁干扰

碳纳米管（CNT）膜在能量存储，热管理和电磁干扰（EMI）屏蔽等广泛领域具有潜在用途。然而，迄今为止报道的其低效，昂贵且耗能的制造工艺和机械脆性是主要缺陷。在此，通过一种简便，高效和节能的方法，制造了一种具有韧性和韧性的碳纳米管（CNT）膜，其中包含天然橡胶（NR），从而可以灵活，高效地屏蔽EMI。与纯CNT膜相比，掺入50 wt％的NR会极大地改善CNT-NR膜的机械性能，例如，抗拉强度和韧性分别提高了3.1倍和486倍。通过添加橡胶材料而产生的CNT膜的增强和增韧效果的起因主要来自增强的应力传递和均匀分散的应力。由于碳纳米管的纵横比和导电率极高，因此即使厚度很小，CNT-NR膜仍具有出色的EMI屏蔽性能。满足商业EMI屏蔽应用所需的临界厚度（屏蔽效率（SE）为20 dB）仅为50μm，并且当膜厚度达到250μm时，可以实现44.7 dB的非常高的EMI SE。同时，即使在以2.0mm的半径弯曲5000次之后，CNT-NR膜也表现出高度可靠的EMI SE。CNT-NR薄膜的这些吸引人的特性，

更新日期：2017-09-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11