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polymeric nanocomposites with improved mechanical, flame retardant, and electromagnetic shielding properties by various approaches has been developed. [15-20] Yu et al. [17] modified the exfoliated Ti3C2 in aqueous solution by using two kinds of cationic modifiers, i.e., cetyltrimethyl ammonium bromide and tetrabutyl phosphine chloride, and studied fire safety properties and flame-retardant mechanism of MXene/TPU nanocomposites. Thermoplastic polyurethane (TPU) is one of the most commonly used elastomers, and it is a multisegmented copoly mer composed of hard segments and soft segments. [21] Due to excellent abrasion resistance, processability, transparency, recyclability, and mechanical performance, TPU is widely used in automobiles, medical devices, tubes, sporting goods, and decorations. However, its low stiffness, thermal conductivity, and tensile strength may limit its application in some fields. To solve these problems, many researchers prepared TPU-based composites by adding rigid functional materials into the TPU matrix. [22-24] Moreover, the polyethylene glycol (PEG) possessing high affinity with MXene. [25-27] Bera and Maji [24] prepared the graphene/TPU nanocomposites by in-situ solution poly merization technique and studied their mechanical properties, the results demonstrated that the tensile strength of the synthesized nanocomposite was increased by 280% and the toughness was increased by 410% after adding 0.10 wt% graphene oxide. Ning et al. [27] prepared the TPU/ PEG/rGO nanocomposites via melt blending method, and the results showed that there was a great interaction between MXene and the matrix after adding PEG. Rheology is a discipline that studies the deformation and flow of materials under the action of applied stress. The formation of internal network structure, filler dispersion, and interface interaction between filler and polymer matrix can be demonstrated by studying the change of modulus and viscosity. [28-34] Therefore, investigating the rheological properties of TPU/MXene composites is of great significance for evaluating the effect of MXene on the internal structure of composites. To our knowledge, the effects of different MXene content on mechanical, thermal, and rheological properties of TPU composites are rare in the open literature, [18] and we studied the rheological properties of MXene-based composites by melt rheology tests for the first time. In this work, we prepared Ti 3 C 2 T x MXene nanosheets by chemical etching Al atom layer from the layered Ti 3 AlC 2 MAX phase, then pretreated the Ti 3 C 2 T x MXene nanosheets with PEG by solution blending, and Ti 3 C 2 T x MXene/TPU nanocomposites were prepared via melt blending and compression molding. Finally, the mechanical properties, In this work, a novel nanocomposite is prepared via a melt blending of thermoplastic polyurethane (TPU) and Ti 3 C 2 T x MXene nanosheets pretreated with polyethylene glycol. It is found that the tensile strength and elongation at break increased by 41.2% and 15.4% at MXene loading values of 0.5 wt%...

Considering the severity of electromagnetic wave contamination and the complexity of the application environment, it is urgent need to centralize multifunction into one material. The environmental durability and large-scale production of electromagnetic shielding foams are major obstacles for industrial applications. Herein, a multifunctional composites foam with high-efficiency electromagnetic interference shielding (EMI) and excellent photo-electro-thermal properties were fabricated by melt extrusion and batch foaming. Due to the porous structure and heterogeneous dielectric/magnetic interface, the obtained composite foams have high electrical conductivity (up to 1.08  10 -2 S/cm) and EMI shielding efficiency (SE) reaching ~27.8 dB in the K band. Moreover, the porous co-continuous structure, surface plasmon resonance effect and high conductivity endowed the composite foams with hydrophobicity, remarkable photo-thermal effect and voltage driven joule heating properties, which can guarantee work normally in humid and extreme cold conditions. This study provide inspiration for the further design and synthesis of high-performance multifunction EMI materials.

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The rapid development of wearable smart devices with the ability to detect physiological activity has contributed to a huge demand for smart strain sensors. However, conventional strain sensors have significant limitations about stretchability. Electrospun strain sensors show great potential for application in the field of wearable strain sensors due to their light weight, good elasticity, stretchability, and ease of processing. In this review, the effects of materials, processing methods, and microstructures of electrospun strain sensors from conductive polymer composites on wearable strain sensors are summarized and discussed. The purpose of this review is to critically review the progress of electrospinning process‐based strain sensors and to predict promising future directions.

The effect of annealing on the electrical and rheological properties of polymer (poly (methyl methacrylate) (PMMA) and polystyrene (PS)) composites filled with carbon black (CB) was investigated. For a composite with CB content near the electrical percolation threshold, the formation of conductive pathways during annealing has a significant impact on electrical conductivity, complex viscosity, storage modulus and loss modulus. For the annealed samples, a reduction in the electrical and rheological percolation threshold was observed. Moreover, a simple model is proposed to explain these behaviors. This finding emphasizes the differences in network formation with respect to electrical or rheological properties as both properties belong to different physical origins.