Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
APPLICATION OF THE SOLUTION BLOW SPINNING TECHNIQUE FOR NON-WOVEN FIBER PRODUCTION USING PVA
Submission Author:
Paulo Moreira , PR
Co-Authors:
Paulo Moreira, Michelle Meruvia
Presenter: Paulo Moreira
doi://10.26678/ABCM.COBEM2021.COB2021-1759
Abstract
When the skin is damaged, bacteria and fungi can infiltrate, leading to infections that may evolve quickly. Cases in which the extent of the injury is large, such as burns and amputations, require more efficient treatments, as these infections can lead to death. Recently, new technologies for bioactive dressings based on nanofibers have been developed to create non-woven fiber that replace conventional textile fibers, such as cotton or gauze, which passively protect injuries. These new dressings can be made from hydrofibers and bactericides can be added to them, which can also be gradually released. The most used method to produce nanofibers is Electrospinning, a technique that has as its main disadvantage the low production efficiency, in addition to the need for a high voltage source. A process that allows the production of fabrics more efficiently, with low cost and speed, without the need for high electrical fields, is the Solution Blow Spinning (SBS). This work, then, is intended for the production of bioactive non-woven fiber by SBS. These nonwoven fibers will be produced based on poly(vinyl alcohol) (PVA), a biocompatible water-soluble polymer, with Chlorhexidine Digluconate (CHX), a bactericide recommended by WHO for cleaning and preparing human tissue for hospital procedures, aiming at its use in the treatment of injuries and burns on the skin. Due to the current difficulty in accessing the laboratories, for an analysis of the production viability, an experimental set was created to manufacture PVA fabrics by SBS. This set was built using a compressor (SCHULZ), a nozzle, a 20 mL syringe with a needle, and a collector. To prepare the solution, PVA (Neon) was used, which was dissolved in water. With this assembly, biopolymeric PVA films were produced varying some parameters such as composition of the solution and distance between nozzle and collector. The characteristics of the films produced varied considerably according to the parameters used, however it was observed that to produce fibers from this polymer, it is necessary to reduce the drying time of the fabric. This was done by coupling a dryer as a source of hot air to the experimental apparatus and adding a solvent, with a lower boiling point, to the solution. Based on these results and verifying that the control of these parameters is essential, an experimental apparatus is being developed that will allow the control of the injection speed, rotation of the collector, and heating
Keywords
nanofibers, electrospinning, Solution Blow Spinning, Poly (vinyl alcohol)
