Covalent thermosets generally exhibit robust mechanical properties, while they are fragile and lack the ability to be reprocessed or recycled. Herein, a new strategy of incorporating noncovalent bonds into main‐chains is developed to construct tough and multi‐recyclable cross‐linked supramolecular polyureas (CSPU), which are prepared via the copolymerization of diisocyanate monomers, noncovalently bonded diamine monomers linked by quadruple hydrogen bonds, and covalent diamine/triamine monomers. The CSPU exhibit remarkable solvent resistance and outstanding mechanical properties owing to the covalent cross‐linking via triamine monomer. Through the incorporation of 9.7% and 14.6% quadruple hydrogen bonded diamine monomer, the transparent CSPU films are endowed with superior toughness of 74.17 and 124.17 MJ m−3, respectively. Impressively, even after five generations of recycling processes, the mechanical properties of reprocessed CSPU can recover more than 95% of their original properties, displaying excellent multiple recyclablity. As a result, the superior toughness, remarkable solvent resistance, high transparency, and excellent multiple recyclability are well‐combined in the CSPU. It is highly anticipated that this line of research will provide a facile and general method to construct various cross‐linked polymer materials with superior recyclability and mechanical properties.

In this paper, we present a multivehicle cooperative driving system architecture using cooperative perception along with experimental validation. For this goal, we first propose a multimodal cooperative perception system that provides see-through, lifted-seat, satellite and all-around views to drivers. Using the extended range information from the system, we then realize cooperative driving by a see-through forward collision warning, overtaking/lane-changing assistance, and automated hidden obstacle avoidance. We demonstrate the capabilities and features of our system through real-world experiments using four vehicles on the road.

Ionic conductors that combine transparency, elasticity, and underwater self-healing capability are highly desirable because of their applications in biosensors, touch panels, marine ships, and so forth. Polymer materials based on ion–dipole interactions can meet these requirements. However, a key trade-off is their relatively weak mechanical properties because of the plasticizing effect. Here, we designed and synthesized a new ionic liquid building block to enable a new design of multivalent ion–dipole interaction. The resultant ion–dipole polymer complex not only enhances the Young’s modulus by more than 3 times but also possesses much better elasticity, without any sacrifice on the ionic conductivity or self-healing capability.

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Hot melt adhesives are widely applied owing to their solvent-free nature. Developing robust and multi-reusable hot melt adhesives without harsh bonding conditions remains a great challenge. Herein, we develop a novel strategy of incorporating flexible side chains into the network of highly noncovalently cross-linked hot melt adhesives to construct super strong and multi-reusable supramolecular epoxy hot melt adhesives (SEA). The SEA was prepared via polycondensation of diglycidyl ether of bisphenol A with O-(2-ureido-4[1H]pyrimidinone)-O′-(2-aminopropyl)polypropylene glycol (the noncovalent cross-linker) and O-(2-aminopropyl)-O′-(2methoxyethyl)polypropylene glycol (the flexible side chain). Impressively, the prepared SEA was endowed with a super high adhesion strength of 10.2 MPa, which is the highest adhesion strength in bonding stainless steel among hot melt adhesives constructed by dynamic bonds to the best of our knowledge. It also featured excellent multiple reusability with more than 80% of the original adhesion strength remained even after reuse for six times. Meanwhile, the SEA displayed an outstanding ability to bond diverse substrates tightly under considerably moderate bonding conditions (80 °C for 5 min). It is highly anticipated that this work will open a new avenue of designing hot melt adhesives with the high adhesion strength and excellent multiple reusability.