Nanofibers or nanofibrous membranes prepared by electrospinning possess many attractive properties, including excellent mechanical properties, high specific surface area and high porosity, making them attractive for sensor application, especially for the electrochemical sensors. Many nanomaterials are used as additives to improve the conductivity, sensitivity and selectivity of sensors. Based on the different modifiers of electrode materials, electrochemical sensors can be divided into enzyme sensors and non-enzyme sensors. In this review, we summarize the recent progress of the electrochemical sensors fabricated by electrospinning, including hydrogen peroxide (H2O2) sensors, glucose sensors and other sensors. In addition, the sensing mechanisms of various electrochemical sensors are introduced in detail. Finally, future research directions of electrochemical sensors based on electrospinning and the challenges faced by large-scale applications of electrospun electrochemical sensors are presented.

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Continuous glass fiber reinforced polylactic acid (CGF/PLA) composites were prepared by 3D printing technology in this study. The multi-roll melt impregnation mold was manufactured according to the melt impregnation model. CGF/PLA filament was prepared by a melt impregnation device, and then used to prepare CGF/PLA composite materials by the self-modified 3D printer device. The full impregnation of the fibers was achieved by the action of the coverage angle of the tension roller in the impregnation mold. The effects of the total coverage angle, traction speed, fiber content, and impregnation temperature on the fiber impregnation effect and 3D printed product performance were studied. The bending strength, tensile strength, impact strength, and interlayer shear strength of the printed sample reached 312, 220, 154, and 14 MPa, respectively. The strategy in this study can effectively improve the impregnation effect of PLA resin on CGFs and promote the development and application of 3D printing technology in the field of high-performance composite manufacturing.

Vacuum bagging (VB) technology has become an important method for low-cost preparation of advanced composites materials. In this work, continuous glass fiber-reinforced polyamide-6 (GF/PA-6) composites were successfully manufactured bt VB process, utilizing the anionic polymerization of caprolactam (a monomer of PA-6). The effects of vacuum pressure, curing temperature, curing time on the monomer conversion, crystallinity, and mechanical properties of the composites were investigated by the self-made experimental platform. The results indicated that the number of fiber layers affected the properties of products by affecting the thickness of composites. Vacuum pressure mainly affected the impregnation process of resin on fiber, and the product performance was the best at 1 bar. The flexural strength and flexural modulus of the composites reached the highest when the curing temperature was 150 C and the curing time was 90 min, which were 273.92 MPa and 14.04 GPa respectively, while the interlaminar shear strength (ILSS) was highest at 170 C, up to 42.73 MPa.

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