The construction of porous nanocarriers with good lubricating performance and stimuli‐responsive drug release is significant for the synergetic therapy of osteoarthritis (OA). Although metal‐organic framework nanoparticles (nanoMOFs) as carriers can support drug delivery, achieving the synergy of aqueous lubrication and stimuli‐responsive drug release is challenging. In this work, a core‐shell nanoMOFs@poly(N‐isopropylacrylamide) (PNIPAm) microgel hybrid via one‐pot soap‐free emulsion polymerization is developed. Programmable growth of the PNIPAm microgel layer on the surface of nanoMOFs is achieved by tuning the concentration of the monomer and the crosslinker in the reaction. Reversible swelling‐collapsing behaviors of the hybrid are realized by tuning the temperature below and above the lower critical solution temperature. When used as water lubrication additives, the hybrid enables reductions in both the coefficient of friction and wear volume. In vitro thermal‐responsive drug release is demonstrated on the diclofenac sodium‐loaded hybrid by controlling the swelling and collapsing states of the PNIPAm nanolayer. Moreover, the good biocompatibility of the hybrid is verified by culturing toward HeLa and BEAS‐2B cells. These results establish a nanoMOFs@microgel hybrid that can achieve friction and wear reduction and thermal‐responsive drug release.

Superhydrophobic surfaces have great potential for self-cleaning, anti-icing, and drag-reducing because of their water repellency property. However, their super-hydrophobicity is destroyed under mechanical abrasion due to the vulnerability of the delicate surface textures. Here, we demonstrate a strategy to create a robust superhydrophobic surface using MXene and fluoridated silica as functional fillers in epoxy resin. The fluoridated silica produces low surface energy, MXene serves as a wear-resistant phase and epoxy resin is the binding matrix. The composite coating demonstrates a self-cleaning effect to remove particles from the superhydrophobic surface by rolling water droplets. Moreover, the coating exhibits excellent mechanical durability by standing abrasion to maintain super-hydrophobicity. The superhydrophobic composite coating has the advantages of low cost and feasibility and has the potential for expandable industrial promotion.

Hydrogels are becoming increasingly popular in biomedical and soft machine manufacturing, but their practical application is limited by poor mechanical properties. In recent years, Hofmeister effect-enhanced gelatin hydrogels have become...

Using the injection molding method, impact-resistant polypropylene (PP) and glass fibers (GF) with weight ratios of 5 wt%, 10 wt%, 15 wt%, 20 wt%, 25 wt% and 30 wt% were blended twice, completing high-impact PP/ GF composites. Next, the tensile strength test, flexural stress test and IZOD impact strength test measured the composites. According to the results, with an increase in glass fibers, the composites exhibited a greater tensile strength, which further reached to climax when the GF weight ratio was 25 wt%. However, tensile strength appeared inversely proportionate to the blending frequency. In addition, regardless of blending frequencies, the optimum flexural stress occurred when the GF weight ratio was 25 wt%; nevertheless, it started declining when the ratio was 30 wt%. Finally, indicated by IZOD impact test, the greater the GF weight ratio, the lower the impact strength the composites exited.

Superhydrophobic surfaces with outstanding liquid-repellent properties have potential applications in anti-icing, self-cleaning, and corrosion protection, which rely on a stable gas–liquid interface and low surface energy for passive protection. However, there are still challenges in overcoming physical damage of the superhydrophobic surface and integrating self-healing and active deicing properties to boost their practical application. Here, we report a photothermal MOF-based superhydrophobic coating with synergistic protective functions of passive liquid-repellent properties (for self-cleaning, anti-icing, and anticorrosion) and active photothermal responsiveness (for deicing and photothermal self-healing). The multifunctional coating was prepared by the spray-coating method, in which fluoridated photothermal ferrocene-MOF nanosheets and SiO2 nanoparticles were applied in epoxy resin to develop their versatility. Passive liquid-repellent properties of the superhydrophobic surface caused high-efficiency removal of solid and liquid contaminants, freezing delay of droplets, and corrosion resistance. Moreover, rapid active deicing performance was achieved without damaging the textural structure of the coating. Importantly, the superhydrophobicity of the surface was maintained after mechanical abrasion. Also, the liquid-repellent properties of the plasma-etched coating recovered rapidly with light illumination due to the photothermal-induced migration of fluorosilane chains. Therefore, the synergy of passive liquid-repellent properties and active photothermal responsiveness provides a strategy for the design of multifunctional coating.