The demand for flexible electronic materials used in wearable devices has experienced a significant surge in recent years. Wearable devices typically incorporate an electronic material or system that can be mounted on a human body. It is imperative that these materials are composed of substances compatible with the human body. Consequently, numerous studies have been undertaken to develop flexible electronic devices with various performance capabilities. In this study, nanowire patterns were manufactured on nanofibers and utilized as patches. To create a nanowire pattern, a direct-write spraying process was employed to investigate changes in electrical characteristics using process variables. The process involved depositing silver nanowires on the surface of nanofibers using a pneumatic spray nozzle. Generated patterns were found to be suitable for use as sensors capable of withstanding skin-attached deformation.

There are various conduit structures such as arteries, veins, and airways in the human body, and they play critical roles in each tissue/organ. However, in recent years, the demand for artificial substitutes for the damaged conduit structure-based tissues and organs has significantly increased as dietary life has rapidly changed. Accordingly, various studies have been conducted, to develop a conduit structure of biocompatible polymers. In this study a 5 mm-diameter conduit structure was developed, using electrospinning process. An electrospinning setup equipped with a cylindrical-rod collector was constructed to fabricate a fibrous conduit structure, and then the impacts of process conditions on morphological and mechanical properties were investigated. Finally, it was shown that the mechanical properties of the fibrous conduit structure in circumferential direction, can be controlled by the electrospinning process conditions.

Recently, porous structures of nano/microfibers are receiving great attention because of their excellent mechanical properties, surface area to volume ratio, and permeability. In this study, thick microfiber mats were fabricated using a melt-electrospinning process in a controlled manner. A melt-electrospinning equipment including a three-axis precision motion control with pneumatic dispensing was constructed. The diameter and deposition pattern of melt-electrospun microfibers with respect to the barrel temperature and pressure were investigated. Based on identified effects of process conditions on microfiber geometry, thick microfiber mats with various properties were successfully fabricated using melt-electrospinning with snake scanning and iterative layering. Their mechanical properties and porosities were then compared and analyzed.