Banca de QUALIFICAÇÃO: LUIZ HENRIQUE PINHEIRO DE LIMA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LUIZ HENRIQUE PINHEIRO DE LIMA
DATE: 28/05/2021
TIME: 14:00
LOCAL: Google Meet
TITLE:

Production of silicone fistulas and plasma modification evaluating physical, chemical, morphological and mechanical properties.

KEY WORDS:

superhidrophobic surface, drag reduction, PDMS, plasma, arteriovenous fistula.

PAGES: 122
BIG AREA: Engenharias
AREA: Engenharia Mecânica
SUMMARY:

An arteriovenous (av) fistula is a surgically created connection between the vein and the artery in the patient's wrist or forearm, due to complications (strictures, thrombosis, aneurysms) of the fistula that are related to the geometry of the location where the artery is located. connects to the vein (anastomosis) and the local abnormal hemodynamics. There are three types of selection, namely: side (vein) to side (artery), end (vein) to side (artery) and (vein) to end (artery). This work produced silicone fistula treated superficially with plasma that can promote drag reduction and improve biological compatibility, reduce the wear of commercial prostheses, in addition to analyzing the mechanical properties of the produced fistulas. Superhydrophobic surfaces (SSH) have high water repellency and are being supplied as an alternative mechanism to reduce drag. As changes promoted on the surface of Sylgard® due to the deposition of substance of how; acetylene, argon and oxygen, through the treatment of plasma has been proven to present the phenomenon of drag reduction on flexible tube surfaces proposed in predefined diameters and lengths of three-dimensional models of clinical cases of patients. The drag reduction was evaluated in an apparatus in the laboratory in permanent flow in the load variations of the engine in 40%, 60%, 80%, 100%, before and after the deposition in plasma. In the acquisition of pressure values at the tube inlet (P1) and the tube outlet (P2) within the time interval for all tests. Surface, morphological and composite modifications, will be proven by XRD and AFM analysis, expecting the impression of a rough structure on the nanometer scale with deposition of chemical elements of the polymerizing solution through the plasma will be shown. The SSH obtained showed less resistance to water flow, tested by imposing the flow on the tubes.

BANKING MEMBERS:
Presidente - 2550377 - THERCIO HENRIQUE DE CARVALHO COSTA
Interna - 2614274 - MICHELLE CEQUEIRA FEITOR
Externo ao Programa - 2654020 - KLEIBER LIMA DE BESSA