Challenge for Trade-Off Relationship between the Mechanical Property and Healing Efficiency of Self-Healable Polyimide

Authors
Kim, YoungnamJo, Jun YoungPark JiminLee, JuheonKim, JaewooJeon, Dae-youngHan, HaksooJung, Yong Chae
Issue Date
2023-11
Publisher
American Chemical Society
Citation
ACS Applied Materials & Interfaces, v.15, no.47, pp.54923 - 54932
Abstract
Polyimide is actively applied in various industrial fields because of its strong mechanical properties, owing to the interactions between the polymer chains. Fully aromatic imide structures exhibit high glass-transition temperatures due to the strong interactions between their chains, which hinder chain mobility. Therefore, preparing a material that exhibits self-healing at a low temperature of ≤100 °C and good mechanical properties is challenging. Thus, we prepared imides with four-component semiaromatic structures by adjusting the contents of 4,4′-(hexafluoroisopropylidene)diphthalic anhydride and 4,4′-(4,4′-isopropylidenediphenoxy)bis(phthalic anhydride) to yield four-component self-healable colorless polyimides (f-SH-CPIs) with novel structures, flexibilities, good mechanical properties, and low healing temperatures. The flexibilities and distances between the polymer chains, as the basis of the trade-off relationship between the mechanical properties and healing efficiency, were controlled. These materials may be used as substrates in wearable devices and multilayer insulation that may protect from space dust, cosmic rays, and satellite fragments.
Keywords
transparentelectrode; disulfide bond; charge-transfer complex(CTC); thin-multiwalled carbon nanotube (TWCNT); colorless polyimide; self-healable
ISSN
1944-8244
URI

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DOI
10.1021/acsami.3c12594
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KIST Article > 2023
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