Ying Li

Stimuli-responsive microwave absorbing (MA) materials are highly desirable for next-generation electromagnetic interference protection systems, as they enable adaptive regulation of electromagnetic responses under dynamic service conditions. Herein, a bioinspired temperature-responsive composite based on Ti₃C₂T_x MXene and poly(N-isopropylacrylamide) (PNIPAAm) is fabricated via in situ polymerization of PNIPAAm within MXene dispersions. Benefiting from the reversible conformational transition of PNIPAAm chains induced by temperature variation, the MXene nanosheets undergo a dynamic bridging-disconnection transformation, analogous to the opening and closing behavior of plant leaf stomata. This microstructural evolution enables adaptive reconstruction of the conductive network, thereby modulating dielectric properties and realizing switchable microwave absorption performance. At 50 °C, the composite delivers a minimum reflection loss of −47.8 dB and a broad effective absorption bandwidth of 5.9 GHz, whereas negligible absorption is observed at 20 °C. This work demonstrates a viable strategy for constructing intelligent, stimuli-responsive MA materials based on MXene@polymer architectures, offering promising prospects for advanced EMI protection and adaptive electromagnetic devices.

Biodegradable magnesium (Mg) and alloys are widely used for orthopedic fixation due to their bone-like elastic modulus and gradual biodegradation, which can eliminate the need for secondary removal surgery; however, rapid and localized corrosion in physiological environments, initiated at defects and microcracks, leads to premature mechanical failure, hydrogen evolution, and alkaline conditions that disrupt protein adsorption and cell integration during early bone healing, making surface coatings essential for controlling interfacial reactions, regulating material transport, and improving biological compatibility. In this work, a comparative and mechanistic framework is presented to evaluate inorganic (Ca-P and oxide), organic (PCL, PLGA, chitosan, collagen), and hybrid coating systems, where representative studies are critically analyzed in terms of corrosion performance, biological response, and key limitations, thereby enabling the identification of consistent structure–property relationships across different coating strategies. The analysis shows that hybrid and multilayer coatings provide the most balanced performance by combining effective barrier protection with controlled Mg²⁺ release and enhanced bioactivity, whereas clinical translation remains limited due to insufficient long-term adhesion under physiological loading, lack of scalable fabrication methods, and the absence of standardized corrosion–biology evaluation protocols, thereby emphasizing the need for next-generation Mg coatings with multifunctionality, controlled degradation, and improved interfacial stability.

Graphene excels at ultra-low pressures (microcrack/tunneling), while MXene porous networks deliver a wider pressure range and stability; this review provides selection guidelines for flexible pressure sensors.

As the intelligent era advances at a rapid pace, the increasingly intricate electromagnetic environment is generating an urgent demand for high-performance, intelligent electromagnetic interference (EMI) shielding materials. Endowed with intrinsic high conductivity, superior hydrophilicity, abundant surface chemistry, and tailorable microstructure, MXenes serve as an ideal platform for constructing next-generation intelligent EMI shielding materials. This review elaborates on the design strategies and response mechanisms of MXene-based intelligent EMI shielding materials with different response types. It specifically clarifies the structure-activity relationship between the evolution of material microstructure and the dynamic modulation of electromagnetic parameters. It reveals the advantages and limitations of different systems through comparative analysis.

It remains a significant challenge in basalt fiber (BF) composites to achieve both high mechanical and thermal‐oxidative mechanical performance. This study proposes a method to construct multi‐dimensional interfaces through synergistic modification of BF and matrix reinforcement of phthalonitrile (PN) with carbon nanotubes. The BF/PN composite with a multi‐dimensional interface exhibited a 96.4% increase in flexural strength and a 109.5% increase in interlaminar shear strength (ILSS). After aging at 250°C for 90 h, the BF/PN composite with a multi‐dimensional interface achieved flexural strength and ILSS values of 1248.9 MPa (retention rate 95.4%) and 64.4 MPa (retention rate 94.6%), respectively, which are 97.8% and 107.1% higher than the pristine sample. The construction of multi‐dimensional interfaces led to tighter interfacial bonding, enhanced interfacial interactions, and improved stress transfer, thereby increasing the ability of the BF/PN composite to resist interfacial failure. This work provides a promising strategy for enhancing the overall performance of BF composites.