Abstract
Despite the growing interest in polydiacetylene (PCDA)-based materials in recent years due to their thermal-stimuli responsive discoloration characteristics, it is still a huge challenge to fabricate high-performance and environment-friendly thermochromic materials. In this work, we demonstrated ultrastrong thermochromic materials based on 1,6-Diaminohexane (DH) crosslinked 2,2,6,6-tetramethylpiperidine-1-oxylradi-cal (TEMPO)-oxidized nanofibrillated cellulose (TNFC) matrix and poly-PCDA chains through a vacuum-assisted filtration assembly technique. The synergistic interactions of covalent cross-linking networks efficiently prevented crack propagation under loading, endowed the resulting TNFC-polyPCDA-DH nanocomposites with super high tensile strength of 281.63 ± 5.63 MPa and Young's modulus of 13.68 ± 1.09 GPa. Moreover, the resultant nanocomposites exhibited a rapidly reversible thermal discoloration (up to 140 °C), and excellent thermal reversible cycling performance. This strategy offers a promising approach to design and prepare flexible high-performance intelligent nanocomposite, which may be widely applied in wearable sensors, displays, and anti-counterfeiting labels.
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