Counterion-mediated modulation of electroadhesion in polyanionic/polycationic hydrogels: mechanisms and performance.

Reversible electroadhesive polyelectrolyte gels have emerged as promising materials for flexible electronic and soft robotic applications. While current research predominantly emphasizes polymer design and structural optimization to enhance both the reversibility and strength of electroadhesion, fundamental limitations persist in elucidating ion-mediated interfacial mechanisms. Herein, the synergistic effects of ion species selection and interfacial engineering were systematically investigated through the development of distinct polyelectrolyte hydrogel assemblies.

Preparation of Colored Polymer Microspheres.

Colored polymer microspheres have attracted significant attention in both academia and industry due to their unique optical properties and extensive application potential. However, achieving a uniform distribution of dyes within these microspheres remains a challenge, particularly when heavy concentrations of dye are used, as this can lead to aggregation or delamination, adversely affecting their application. Additionally, many dyes are prone to degradation or fading when exposed to light, heat, or chemicals, which compromises the long-term color stability of the microspheres.

Mechano-Responsive Fluorescent Gel based on Tetraphenylethylene-Crosslinked Dynamic Covalent Network.

The rapid development of mechano-responsive fluorescence has been driven by its promising applications in the fields of sensors, information encryption, and anti-counterfeiting. However, designing mechanophores that can exhibit fluorescence changes under relatively low force remains challenging. In this study, a mechano-responsive fluorescent gel was developed using a tetraphenylethylene derivative as a cross-linker, producing a dynamic covalent network that exhibits increased fluorescence under tensile stress.