Bacterial infection often induces chronic repair of wound healing owing to aggravated inflammation. Hydrogel dressing exhibiting intrinsic antibacterial activity may substantially reduce the use of antibiotics for infected wound management. Hence, a versatile hydrogel dressing (rGB/QCS/PDA–PAM) exhibiting skin adaptiveness on dynamic wounds and  mild photothermal antibacterial activity is developed for safe and efficient infected wound treatment. Phenylboronic acid‐functionalized graphene (rGB) and oxadiazole‐decorated quaternary carboxymethyl chitosan (QCS) are incorporated into a polydopamine–polyacrylamide (PDA–PAM) network with multiple covalent and noncovalent bonds, which conferred the hydrogel with flexible mechanical properties, strong tissue adhesion and excellent self‐healing ability on the dynamic wounds. Moreover, the glycocalyx‐mimicking phenylboronic acid on the surface of rGB enables the hydrogel to specifically capture bacteria. The enhanced membrane permeability of QCS enhanced bacterial vulnerability to photothermal therapy（PTT）, which is demonstrated by efficient mild PTT antibacteria against methicillin‐resistant Staphylococcus aureus in vitro and in vivo at temperatures of <49.6 °C. Consequently, the hydrogel demonstrate accelerated tissue regeneration on MRSA‐infected wound in vivo, with an intact epidermis, abundant collagen deposition and prominent angiogenesis. Therefore, rGB/QCS/PDA–PAM is a versatile hydrogel dressing exhibiting inherent antibacterial activity and has considerable potential in treating wounds infected with drug‐resistant bacteria.

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Inspired by the remarkable adhesion of mussels, the mimicking of natural adhesive molecules has been widely used for surface modification. In the present study, an economical and easily available biomimic material named as tannic acid–Fe 3+ (TA–Fe 3+ ) was first directly used as a surface modifier, carbonization agent, smoke inhibitor, and flame-retardant synergist. Compared with the flame-retardant magnesium hydroxide (Mg(OH) 2 ), TA–Fe 3+ -modified Mg(OH) 2 endowed polyamide 6 (PA 6) with improved mechanical performance and flame-retardant properties. The flame-retardant and smoke-suppressant properties were tested by the limiting oxygen index and cone calorimeter tests. The flame-retardation mechanism was investigated by thermogravimetric analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy. The tensile strength could increase up to 90%, and the modified flame retardant was found to have higher UL-94 grade with the same dosage of flame-retardant additives. The peak heat release rate, total heat release, peak of smoke production rate, and total smoke production were significantly reduced. The synergistic effect between TA–Fe 3+ and Mg(OH) 2 was also discussed. This study provides new insights into the direct utilization of a biomimicking adhesive molecule, TA–Fe 3+ , to realize simultaneous composite reinforcement and flame-retardant property enhancement. Meanwhile, because of the extensive synergies of flame-retardant metal oxide with iron element and the universal growth characteristics of TA–Fe 3+ , it has potential applications in the preparation of various flame-retardant polymers.

Near-infrared (NIR)-light responsive graphene have been shown exciting effect on cancer photothermal ablation therapy. Herein, we report on the preparation of Fe 3 O 4-decorated hollow graphene microspheres (rGO@Fe 3 O 4) by a facile spray drying and coprecipitation method for the magnetically targeted and NIR-responsive chemophotothermal combination therapy. The microspheres displayed very high specific surface area (~120.7 m 2 g −1) and large pore volume (~1.012 cm 3 g −1), demonstrating distinct advantages for a high loading capacity of DOX (1 8.43%). NIR triggered photothermal effect of the rGO@Fe 3 O 4 microspheres responded in an on-off manner and induced a high photothermal conversion efficiency. Moreover, The Fe 3 O 4 on the microspheres exhibited an excellent tumor cells targeting ability. The chemo-photothermal treatment based on rGO@Fe 3 O 4 /DOX showed superior cytotoxicity towards Hela cells in vitro. Our studies indicated that rGO@Fe 3 O 4 /DOX microcapsules have great potential in combined chemo-photothermal cancer treatment.

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