A dual-crosslinking strategy for building photoluminescence hydrogel with toughness, self-recovery, and two-color tunabi
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A dual-crosslinking strategy for building photoluminescence hydrogel with toughness, self-recovery, and two-color tunability Yifei Lu 1 & Jia Shao 1 & Sui Wang 1 & Zhiyong Guo 1 & Yufang Hu 1 Received: 11 April 2020 / Revised: 27 July 2020 / Accepted: 23 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The development of tenacity photoluminescent (PL) hydrogels is very great significance to promote the application of optical technology in hydrogel. Herein, we report a high-toughness PL hydrogel that combines synthetic hydrophilic lanthanide complex (LCs) and tannic acid (TA) with polyvinyl alcohol (PVA) by frozen-thawing. The resulting hydrogel has high mechanical strength (1194.46-kPa tensile strength, 1266.17-kJ m−3 toughness energy, 1915.58-kPa compressive strength, and 269.79-kJ m−3 energy dissipation at 80% compression), excellent self-recover and anti-fatigue performance, good photoluminescence, and switchable functions under UV light, showing red (254 nm) and green (365 nm), respectively. The design strategy offers a new approach for the preparation of multifunctional and tenacity PL hydrogels. Keywords Photoluminescent hydrogel . Hydrophilic lanthanide complex . Switchable . Tenacity . Self-recover . Anti-fatigue
Introduction Hydrogels are a three-dimensional hydrophilic polymer network that swells with great amounts of water [1–3]. They are attractive biomaterials due to the virtue of good bionic structure, adjustable self-healing, and other advantages [4, 5]. Recently, in order to expand the application range of hydrogels, great efforts have been made to give hydrogels many specific functions, such as photoluminescence (PL), electrical response, thermal sensitivity, etc. [6–8], especially photoluminescent hydrogels with excellent luminescent behavior prepared by the introduction of various photoluminescent materials into the polymer networks of hydrogels [9, 10]. Due to their properties that can be monitored in real time, PL hydrogels have received increasing Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00396-020-04756-8) contains supplementary material, which is available to authorized users. * Sui Wang [email protected] 1
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, People’s Republic of China
attention in areas such as drug delivery, bioimaging, and chemical/biological sensing [11–13]. In general, PL hydrogels are obtained by directly fixing luminescent carriers (including organic dyes, quantum dots (QDs), luminescent carbon nanodots (CNDs), or metal ion complexes) into a gel network [14–16]. Among all luminescent materials, lanthanide complexes (LCs) are regarded as one of the most promising photoluminescent materials because of their intriguing optical characteris
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