Analysis of the microphase structure and performance of self-healing polyurethanes containing dynamic disulfide bonds

doi:10.1039/d0sm01072c

	Analysis of the microphase structure and performance of self-healing polyurethanes containing dynamic disulfide bonds
	Qu, Qiqi 1,2; Wang, Hua 2,3; He, Jing 1,2; Qin, Tengfei 1,2; Da, Yunsheng 1,2; Tian, Xingyou 2
刊名	SOFT MATTER
	2020-10-21
卷号	16
ISSN号	1744-683X
DOI	10.1039/d0sm01072c
通讯作者	Wang, Hua(wanghua@issp.ac.cn)
英文摘要	Self-healable polyurethanes can be used in various fields for extended service life and reduced maintenance costs. It is generally believed that the shape memory effect is helpful for achieving a high healing efficiency. The morphological features were focused on in this study as microphase separation is one of the main factors affecting various performances of polyurethanes, including their shape memory behavior and mechanical properties. Microphase separation can be regulated by changing the content and types of the hard segments. With this in mind, polyurethanes from polycaprolactone diol, hexamethylene diisocyanate, and different chain extenders were synthesized, characterized, and designed as promising self-healing polymers. All the polyurethane specimens were equipped with a similar content of hard segments but diverse types, such as aliphatic, aromatic, and disulfide-bonded. Differential scanning calorimetry, thermogravimetric analysis, X-ray diffractometry, infrared spectroscopy, and atomic force microscopy were used to describe the microstructures of the polyurethanes, including the crystalline regions. The relationship between the microphase separation structures and material properties was focused on in this examination. Various properties, including the thermal stability, mechanical behavior, hydrophobicity, and self-healing efficiency showed significant differences due to the change in the hard segments' structure and multiphase distribution. The aliphatic disulfide stimulated the conformation of a proper microphase separation structure (the large heterogeneous structure at physical length scales as well as a more sufficient combination of soft and hard phases), which helped to improve the healing effect as much as possible by effective wound closure and the exchange reactions of disulfide bonds.
资助项目	National Key R&D Program of China[2017YFB0406200] ; Strategic Priority Research Program of the Chinese Academy of Science[XDA13040505] ; Science and Technology Service Network Initiative of the Chinese Academy of Sciences (guide project for innovative and entrepreneurial)[KFJ-STS-SCYD-112] ; Key deployment project of the Chinese Academy of Sciences[KFZD-SW-416] ; Science and Technology Cooperation Project of Sichuan Province ; Chinese Academy of Sciences[2017JZ0028] ; Youth Innovation Promotion Association, CAS[2014288] ; Major science and technology projects of Anhui Province[18030901083]
WOS关键词	ELASTOMERS ; SEPARATION
WOS研究方向	Chemistry ; Materials Science ; Physics ; Polymer Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000577734200015
资助机构	National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Science ; Science and Technology Service Network Initiative of the Chinese Academy of Sciences (guide project for innovative and entrepreneurial) ; Key deployment project of the Chinese Academy of Sciences ; Science and Technology Cooperation Project of Sichuan Province ; Chinese Academy of Sciences ; Youth Innovation Promotion Association, CAS ; Major science and technology projects of Anhui Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/104557]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Hua
作者单位	1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Chinese Acad Sci, HFIPS, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China 3.Chinese Acad Sci, Hefei Inst Technol Innovat, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Qu, Qiqi,Wang, Hua,He, Jing,et al. Analysis of the microphase structure and performance of self-healing polyurethanes containing dynamic disulfide bonds[J]. SOFT MATTER,2020,16.
APA	Qu, Qiqi,Wang, Hua,He, Jing,Qin, Tengfei,Da, Yunsheng,&Tian, Xingyou.(2020).Analysis of the microphase structure and performance of self-healing polyurethanes containing dynamic disulfide bonds.SOFT MATTER,16.
MLA	Qu, Qiqi,et al."Analysis of the microphase structure and performance of self-healing polyurethanes containing dynamic disulfide bonds".SOFT MATTER 16(2020).