Flash spinning is a high-efficiency fiber production process that forms both fibers and nonwoven sheets simultaneously by rapidly evaporating a polymer solution using a volatile solvent under high pressure. This review examines the fundamental mechanisms of flash spinning and the unique structural characteristics of flash-spun nonwoven fabrics. These materials exhibit excellent mechanical strength, breathability, water resistance, and chemical durability due to their continuous filament structure and high porosity. As a result, flash-spun nonwovens are widely applied in various sectors including medical packaging, protective clothing, construction membranes, industrial filters, and specialty packaging. Despite their advantages, the process faces challenges such as the use of environmentally hazardous solvents, limited material compatibility, and difficulties in quality control. Recent research efforts focus on eco-friendly solvent systems, surface functionalization, process simulation, and the integration of biodegradable or functional polymers. Future developments should aim to enhance sustainability and precision in production, positioning flash spinning as a core platform technology for advanced nonwoven materials. This review provides a comprehensive overview of current research trends, technological advancements, and future prospects in the field of flash-spun nonwovens.

This study investigated the braiding weaving method and the resulting tensile and flexural properties of rigid bodies based on different types of carbon fiber yarns. The research examined the physical properties of rigid bodies at various weaving angles using T700, T800, and PITCH-based yarns. The results revealed that the type of carbon fiber yarn directly influences the tensile characteristics of the rigid body. T800 yarn exhibited high strength, while PITCH-based yarn demonstrated high elongation, confirming that each yarn maintained its relative characteristics. The study found that the properties of braided rigid bodies vary depending on the yarn properties and weaving angle. At 0 degrees (UD direction), the rigid bodies displayed pure carbon fiber characteristics. However, as the weaving angle increased, a transition towards polymer resin properties was observed. The investigation confirmed a significant decrease in both tensile and flexural strength as the weaving angle increased. The results obtained through this study will serve as important basic data for setting the correct process conditions in the production of carbon fiber rigid bodies using the braiding method.

The study presents the development of an immersive virtual fitting program leveraging deepfake technology and its extension to video formats. Traditional online shopping environments have been limited by challenges such as the inability to try on clothing, lack of realism, and restricted selection of apparel, thereby constraining the consumer experience. This research integrates advanced deep learning technologies, including StableVITON, DeepFaceLab, and MusePose, to seamlessly synthesize consumer facial images with model images and adapt selected garments appropriately. Furthermore, motion synthesis was implemented to provide virtual fitting results in video format, enabling a more realistic and natural user experience. The results demonstrate that the program achieves high-quality synthesis not only for apparel from specific retailers but also for garments from diverse sources, offering a highly realistic fitting experience. Future developments will focus on optimizing code efficiency and expanding into 3D domains to deliver faster and more precise virtual fitting services.

This study synthesized dihexylated diammonium (HDI) dyes incorporating various anions and investigated their effects on the near-infrared (NIR) absorption spectral properties. The anions used for HDI were tetrafluoroborate (BF4-), hexafluorophosphate (PF6-), bis(trifluorosulfonyl)imide (TFSI-), and tetrakis(pentafluorophenyl)borate (TPFB-). These HDI dyes exhibited negative solvatochromism, shifting absorption to shorter wavelengths in polar solvents. In non-polar solvents, molar extinction coefficients varied with anion size and electronegativity, increasing in the order BF4- < PF6- < TFSI- < TPFB-. In addition, coated fabric samples were prepared to assess the photothermal effect of the TPFB-based HDI dye. When exposed to a 1064 nm laser (1 W/cm2), surface temperature surged to 220 °C within 3 s, even causing carbonization. These results demonstrate that anion selection significantly influences HDI dye’s optical properties and enables superior NIR photothermal conversion. With low visible-light absorption and high NIR absorption, the HDI dye holds promise for smart textile applications.

The rapid growth of 5G, AI computing, IoT, and high-density electronics has increased demand for polymeric insulators with low signal delay, low energy loss, and high thermal and chemical stability. While polyimides (PIs) are widely used for their thermal resistance and mechanical strength, conventional PIs often fail to meet the stringent dielectric requirements of modern high-frequency applications, prompting the need for new molecular designs. The dielectric behavior of PIs is closely related to the chemical structure of their dianhydride and diamine monomers. In particular, the electronic density, chain rigidity, aromatic content, and substituents of the dianhydride moiety significantly influence the dielectric constant (Dk) and dissipation factor (Df ) of the resulting PI across a wide frequency range. In this study, four representative dianhydrides-pyromellitic dianhydride (PMDA), 4,4’-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 4,4’-biphthalic anhydride (BPDA), and 3,3’,4,4’-oxydiphthalic anhydride (ODPA)-were polymerized with a common diamine, 4,4’-oxydianiline (ODA), to synthesize a series of low dielectric PI films. The resulting PIs were characterized to evaluate the effects of backbone chemical linkage structure on Dk and Df over a range of frequencies. Additionally, thermal properties were assessed using thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and thermomechanical analysis (TMA). This work aims to elucidate structure-property relationships in PI systems and provide design guidelines for high-performance polymeric insulators tailored for next-generation electronic and communication technologies.

In this study, the influence of carboxymethyl cellulose(CMC) on the structure and adsorption behavior of TEMPO-oxidized cellulose nanofibril(TOCN) based aerogel was investigated. The rheological and precipitation observations strongly supported the prevention of TOCN hornification by CMC. The SEM images of prepared aerogel confirmed the dense pore structure owing to low hornification of TOCN. The adsorption behaviors of the fabricated aerogels were isothermally and kinetically studied using methylene blue(MB) as a cationic model dye. CMC added TOCN aerogel showed the highest maximum adsorption capacity (208.07 mg·g-1) towards MB due to the dense pore structure and maintained the adsorption performance after 5 repeated adsorption cycles. The effect of TOCN hornification was an important parameter on the TOCN aerogel structure and adsorption performance.