Strain‐Induced Alignment Mechanisms of Carbon Nanotube Networks

纳米技术 拉伤 分子动力学
作者
Rebekah Downes,Shaokai Wang,David Haldane,Andrew Moench,Richard Liang
出处
期刊:Advanced Engineering Materials [Wiley]
卷期号:17 (3): 349-358 被引量:47
标识
DOI:10.1002/adem.201400045
摘要

Random networks comprised of millimeter-long multi-walled carbon nanotubes (CNTs) have shown unique microstructure change mechanisms under uniaxial strain. These networks can be modified into highly aligned microstructures from strain-induced plastic deformation. Applying a treatment consisting of an uncured resin as a load transfer enhancement medium leads to a dramatically increased degree of alignment and final mechanical properties of the CNT networks. The structural evolution of the CNT networks includes different modes: de-bundling, elongation to reduce waviness, sliding friction, and packing for self-assembly into large bundles. The high ductility of the treated networks, which allows the network to achieve high degrees of strain-induced alignment is mainly because the extra high aspect ratios of the individual CNT and their bundles as well as enhanced load transfer. High aspect ratio causes high degrees of entanglement and locking points between the nanotubes in the random network, which are critical to provide adequate nanotube to nanotube load transfer for ductile deformation and lead to substantially increased CNT alignment during mechanical stretching. The classical strain strengthening mechanisms used in metals and polymers such as strain hardening and crystallization of long molecular chains are discussed and compared to CNT network deformation mechanisms. The CNT network strain hardening parameter n value is as high as 0.65, over three times that of annealed low-carbon steel and more than four times of polycarbonate plastics. Strength coefficient K values for the CNT network also show high values up to roughly 450 MPa, comparable to that of annealed magnesium alloys. The results show how the high degree of alignment of CNT networks and strain strengthening can be achieved through simple uniaxial strain and load transfer medium.
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
scanker1981发布了新的文献求助30
刚刚
自信胡萝卜完成签到,获得积分20
刚刚
英姑应助凯里欧文采纳,获得10
1秒前
asda发布了新的文献求助10
1秒前
1秒前
Miracle发布了新的文献求助10
2秒前
2秒前
2秒前
znn发布了新的文献求助10
3秒前
林淼完成签到 ,获得积分10
3秒前
Hello应助zhongcaiying采纳,获得10
3秒前
4秒前
舒心梦琪发布了新的文献求助10
4秒前
4秒前
平淡千秋完成签到,获得积分10
5秒前
Mine发布了新的文献求助10
5秒前
Harry完成签到,获得积分20
5秒前
小陈完成签到,获得积分10
6秒前
6秒前
忧虑的安青完成签到,获得积分20
6秒前
6秒前
马瑞完成签到,获得积分10
6秒前
脑洞疼应助酷酷采纳,获得10
8秒前
9秒前
11秒前
蓝色雪狐完成签到,获得积分10
11秒前
哈哈发布了新的文献求助10
11秒前
11秒前
13秒前
搜集达人应助段段采纳,获得10
14秒前
DingShicong完成签到 ,获得积分10
14秒前
Miracle完成签到,获得积分10
15秒前
研友_VZG7GZ应助小刘采纳,获得10
15秒前
feifei发布了新的文献求助30
15秒前
丘比特应助悠悠爱学习采纳,获得10
16秒前
Janet发布了新的文献求助10
16秒前
研友_Z33zkZ发布了新的文献求助10
16秒前
CR7应助小宋宋采纳,获得20
16秒前
852应助望北楼主采纳,获得10
16秒前
七月流火给阅知的求助进行了留言
16秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
Effective Learning and Mental Wellbeing 300
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 3974844
求助须知:如何正确求助?哪些是违规求助? 3519270
关于积分的说明 11197844
捐赠科研通 3255496
什么是DOI,文献DOI怎么找? 1797791
邀请新用户注册赠送积分活动 877187
科研通“疑难数据库(出版商)”最低求助积分说明 806202