Summary |
In this study, the electrospinning machine with a remote-control function was developed to fabricate the polymeric nanofiber mesh for tissue engineering application. The self-assembled electrospinning machine composites of the three-axis control system, stage controller with high-voltage bias power supply and remote-control model. The conditions of fabricated nanofiber mesh, such as dimensions, geometries and length, are defined by several parameters, including bias voltages, the injection rate of polymeric solution, stage distances between the injection needle and collection stage and moving speeds of the stage. Fabrication parameters of fiber meshes can be analyzed by using developed software and then sent from desktop computer via the wireless model to the electrospinning machine to produce required different diameters and geometry of the nanofibers. The fabricated smallest diameter of electrospun fiber reached to approximate 150 nanometers and fabricated fiber mesh had a high porosity and surface ratio that provide an ideal microenvironment for cell attachments, proliferations and differentiations as shown in the in-vitro cell culture experiment. For this, the above advantages of the nanofibers are regarded as an appropriate drug carrier. To produce effective wound dressing, some criteria about drug delivery ability and cytotoxicity should be postulated. Hence, the biocompatible PCL2b200 nanofiber mesh and beads containing epidermal growth factor (EGF) were fabricated separately by using our developed electrospinning and electrospray process for the tissue regeneration applications. The drug release behaviors of two fabricated EGF nano-scaffolds were characterized for 448 hours. The EGF nanofiber mesh performed the quicker released speed and higher release amount than beads. Due to the influence of released EGF, nanofiber mesh also reveals a better proliferation and cell viability than beads that was proved by using the MTT assay. In accordance with the above characteristics of the fabricated nanofiber, it encompasses the potency to be an ideal biomaterial to apply for tissue engineering. |