Tuning hard phase towards synergistic improvement of toughness and self-healing ability of poly(urethane urea) by dual chain extenders and coordinative bonds

韧性 材料科学 极限抗拉强度 相(物质) 复合材料 高分子化学 热塑性聚氨酯 聚合物 自愈 化学工程 氢键 有机化学 化学 弹性体 分子 医学 替代医学 病理 工程类
作者
Yu-han Li,Wenjuan Guo,Wenjuan Li,Xin Liu,Hao Zhu,Jinping Zhang,Xingjiang Liu,Liuhe Wei,Ailing Sun
出处
期刊:Chemical Engineering Journal [Elsevier BV]
卷期号:393: 124583-124583 被引量:92
标识
DOI:10.1016/j.cej.2020.124583
摘要

Abstract It is challenging to simultaneously improve the toughness and self-healing ability of thermoplastic polyurethane (TPU) due to mutually exclusive dependence on chain motion and hard phase. In this work, a novel poly(urethane urea) (PUU) was synthesized by using 2, 6-diamimopyridine (Py) and cystamine (Cy) as chain extenders and subsequently complexed with Zn2+ ions. It is revealed that the pyridine moieties together with formation of coordinative bonds significantly influences microphase separation by interfering with hydrogen bonding. A Py/Cy molar ratio of 1:2 is optimal to remarkably improve the toughness and self-healing ability. Specifically, its tensile strength, toughness and self-healing efficiency simultaneously improve to 9.40 ± 0.10 MPa, 64.49 ± 1.75 MJ/m3, and 96.64 ± 1.52% with 92%, 139% and 29% increment compared to PUU-Cy, respectively. The synergistic enhancing effect is the consequence of compromised hard phase and coordinative bonds. Firstly, decrease of hard domain content leads to loosely packed hard segments dispersing in soft phase, facilitating disulfide exchange. Secondly, the coordinative bonds serving as dynamic crosslinking joints not only restrict chain dislocation but also contribute to better self-healing ability than hydrogen bonds. An electrode film derived from embedding silver nanowires (AgNWs) into this material exhibits self-repairable and robust sensing properties due to reconstructing conducting network by self-healable matrix. This unique feature endows it with a great potential in the field of flexible electronics and wearable devices.
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
1秒前
zjj完成签到,获得积分10
2秒前
4秒前
5秒前
shanmao完成签到,获得积分10
5秒前
啊啊发布了新的文献求助10
6秒前
6秒前
西北孤傲的狼完成签到,获得积分10
7秒前
8秒前
8秒前
9秒前
9秒前
量子星尘发布了新的文献求助10
9秒前
研友_VZG64n发布了新的文献求助10
10秒前
卡皮巴拉完成签到,获得积分10
11秒前
停停走走发布了新的文献求助10
12秒前
12秒前
12秒前
香蕉觅云应助张小鱼采纳,获得10
13秒前
嘟嘟喂嘟嘟给嘟嘟喂嘟嘟的求助进行了留言
14秒前
15秒前
渔渔发布了新的文献求助10
15秒前
完美绮琴完成签到,获得积分10
15秒前
凯旋预言发布了新的文献求助10
16秒前
蜡笔完成签到,获得积分10
17秒前
迷人的访梦完成签到,获得积分20
17秒前
sisyphus_yy发布了新的文献求助10
17秒前
现代的访曼应助十七采纳,获得20
17秒前
轩辕德地完成签到,获得积分10
18秒前
无花果应助停停走走采纳,获得10
19秒前
cc完成签到,获得积分10
19秒前
20秒前
20秒前
英俊的铭应助ZYao65采纳,获得10
22秒前
小蘑菇应助欣喜胡萝卜采纳,获得10
22秒前
sisyphus_yy完成签到,获得积分10
23秒前
充电宝应助小巧的水蓝采纳,获得10
23秒前
24秒前
今后应助陈椅子的求学采纳,获得10
24秒前
24秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Handbook of Marine Craft Hydrodynamics and Motion Control, 2nd 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 3987381
求助须知:如何正确求助?哪些是违规求助? 3529697
关于积分的说明 11246584
捐赠科研通 3268310
什么是DOI,文献DOI怎么找? 1804128
邀请新用户注册赠送积分活动 881390
科研通“疑难数据库(出版商)”最低求助积分说明 808665