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Wearable and stretchable strain sensors have potential values in the fields of human motion and health monitoring, flexible electronics, and soft robotic skin. The wearable and stretchable strain sensors can be directly attached to human skin, providing visualized detection for human motions and personal healthcare. Conductive polymer composites (CPC) composed of conductive fillers and flexible polymers have the advantages of high stretchability, good flexibility, superior durability, which can be used to prepare flexible strain sensors with large working strain and outstanding sensitivity. This review has put forward a comprehensive summary on the fabrication methods, advanced mechanisms and strain sensing abilities of CPC strain sensors reported in recent years, especially the sensors with superior performance. Finally, the structural design, bionic function, integration technology and further application of CPC strain sensors are prospected.

Abstract Drug disposal and abuse are increasing every year, and the use of drugs has recently reached its peak due to COVID‐19. However, there still remains a lack of awareness regarding the proper disposal of waste medications, and if not properly disposed of, these complex chemical structures can have severe environmental impacts. Furthermore, as this waste contains chemically valuable substances, a recycling strategy is needed. To address this issue, the potential of reusing expired commercial acetaminophen tablets as freeze‐dried acetaminophen (FAP) for a lithium‐ion battery (LIB) anode material is investigated. The Li storage mechanism and electrochemical performance are investigated via density functional theory, ex situ Fourier‐transform infrared spectroscopy, galvanostatic discharge/charge analysis, and cyclic voltammetry. The FAP anode exhibited the excellent electrochemical performances and cycle stability. This study will present a new recycling approach, and the results demonstrate the application potential of waste medications in LIBs, which can contribute to resource recovery and the circular economy.

Abstract Limited by preparation time and ligand solubility, synthetic protocols for cyclodextrin‐based metal‐organic framework (CD‐MOF), as well as subsequent derived materials with improved stability and properties, still remains a challenge. Herein, an ultrafast, environmentally friendly, and cost‐effective microwave method is proposed, which is induced by graphene oxide (GO) to design CD‐MOF/GOs. This applicable technique can control the crystal size of CD‐MOFs from macro‐ to nanocrystals. CD‐MOF/GOs are investigated as a new type of supramolecular adsorbent. It can selectively adsorb the dye molecule methylene green (MG) owing to the synergistic effect between the hydrophobic nanocavity of CDs, and the abundant O‐containing functional groups of GO in the composites. Following high temperature calcination, the resulting N, S co‐doped porous carbons derived from CD‐MOF/GOs exhibit a high capacitance of 501 F g−1 at 0.5 A g−1, as well as stable cycling stability with 90.1% capacity retention after 5000 cycles. The porous carbon exhibits good electrochemical performance due to its porous surface containing numerous electrochemically active sites after dye adsorption and carbonization. The design strategy by supramolecular incorporating a variety of active molecules into CD‐MOFs optimizes the properties of their derived materials, furthering development toward the fabrication of zeitgeisty and high‐performance energy storage devices.

The wound healing process is usually susceptible to different bacterial infections due to the complex physiological environment, which significantly impairs wound healing. The topical application of antibiotics is not desirable for wound healing because the excessive use of antibiotics might cause bacteria to develop resistance and even the production of super bacteria, posing significant harm to human well-being. Wound dressings based on adhesive, biocompatible, and multi-functional hydrogels with natural antibacterial agents have been widely recognized as effective wound treatments. Hydrogels, which are three-dimensional (3D) polymer networks cross-linked through physical interactions or covalent bonds, are promising for topical antibacterial applications because of their excellent adhesion, antibacterial properties, and biocompatibility. To further improve the healing performance of hydrogels, various modification methods have been developed with superior biocompatibility, antibacterial activity, mechanical properties, and wound repair capabilities. This review summarizes hundreds of typical studies on various ingredients, preparation methods, antibacterial mechanisms, and internal antibacterial factors to understand adhesive hydrogels with natural antibacterial agents for wound dressings. Additionally, we provide prospects for adhesive and antibacterial hydrogels in biomedical applications and clinical research.

A pH-responsive curcuminoid delivery system based on supramolecular vesicles was fabricated via a novel host–guest inclusion complex between water-soluble pillar[5]arene (WP5) and hydrophobic bisdemethoxycurcumin (BDMC). This WP5 and BDMC (WP5 ⊃ BDMC) inclusion complex was studied using 1H NMR, UV–vis, and fluorescence spectroscopy. This resulting inclusion complex could self-assemble into well-defined supramolecular vesicles by host–guest interactions and presented a significant pH-responsive behavior, which was investigated using dynamic laser scattering, transmission electron microscopy, and UV–vis spectroscopy. The suitable preservation time for WP5 ⊃ BDMC and the construction ratio between host/guest molecules were both of great significance for the aggregated morphology of supramolecular vesicles. Furthermore, the BDMC complexes showed good anticancer ability in vitro, as they could inhibit HepG2 cell proliferation and migration. Therefore, the curcuminoid vesicles could provide a promising platform for drug delivery or food packaging utilization.