Caracterización microscópica de texturas superficiales fabricadas aditivamente mediante estereolitografía láser

Abstract

Objetivo: En nuestro trabajo presentamos el desarrollo de texturas superficiales con diferentes geometrías fabricadas por manufactura aditiva. Metodología: Los sustratos con diferentes texturas superficiales son diseñados por medio de programas asistidos por computador (CAD). La fabricación de las diferentes superficies se realiza capa a capa, en un solo proceso, por medio de la técnica de estereolitografía láser (SLA), directamente desde los archivos CAD. Resultados: Las superficies de los sustratos fueron evaluadas mediante ensayos ópticos con el objetivo de medir la topografía de las superficies, validar el acabado superficial y controlar los métodos de fabricación a través de las estrategias de medición en diferentes perfiles. Conclusión: En este estudio mostramos que las texturas superficiales impresas presentaron una reducción de los valores de medidas de longitud, volumen y masa en comparación con la definida en el diseño.Palabras clave: Manufactura aditiva, Microscopía óptica, Resina fotocurable.

Manufacturing of Polymeric Substrates with Copper Nanofillers through Laser Stereolithography Technique

“…Laser stereolithography is a process working upon a liquid resin, whose polymerization is selectively activated by an ultraviolet laser. This laser gradually draws layers on the surface of the liquid resin, following a pattern defined in the STL file, after adequate slicing for layer-by-layer pattern and laser movement definition [5,12].…”

“…In a way, the straightforward solid free-form fabrication of complex objects and the sustainable production without much debris and in a wide set of materials are promoted. For these reasons, additive technologies are reinventing production processes and enabling the rapid production of innovative products and complex geometries, thanks to the layer-by-layer approach, with a degree of complexity that cannot be matched by more traditional methods and techniques, although the final performance of manufactured parts is not always as perfect as that obtained with traditional procedures [1,2,3,4,5]. Consequently, finding alternative methods that allow improving the mechanical, thermal and electrical properties of materials employed in additive manufacturing is a relevant field of study with industrial and scientific significance.…”

“…Both surface and bulk functionalization of the basic materials may lead to final devices with enhanced properties and innovative functionalities. Laser stereolithography (SLA) [6,7,8] is an industrial gold standard, among additive manufacturing techniques, used for the manufacture of devices by photopolymerization, which allows for a great control of the dimensions and features of the substrate, when compared to other additive manufacturing techniques [5,9,10,11,12], although final parts are sometimes too brittle for demanding industrial applications. In this order of ideas, this work focuses on designing and manufacturing substrates with enhanced functionalities and performance, thanks to systematically modifying the base material (commercial photo-resin for laser stereolithography) using copper nanowires (Cu NWs) as additives for mass/bulk-functionalization.…”

Physical and Chemical Properties Characterization of 3D-Printed Substrates Loaded with Copper-Nickel Nanowires

“…SLA is a 3D printing technique that can produce complex 3D structures easily, rapidly, and precisely; the SLA technique allows the production of a wide range of shapes and components and is considered as a method of reference in rapid RP [2,[4][5][6][7]. It is already used to manufacture microelectromechanical systems (MEMSs) and microfluidic devices [5,6,[8][9][10][11], and loading the photopolymerizable resin matrix with functional fillers opens the possibility of new composite materials and devices with tailored properties [12][13][14][15]. Several studies already present the development of functional composites with improved performance related to the manufacturing of flexible component materials [16][17][18].…”

“…Several studies already present the development of functional composites with improved performance related to the manufacturing of flexible component materials [16][17][18]. Besides this, both the surface and bulk functionalization of the essential elements may lead to final devices with enhanced properties and innovative functionalities [7][8][9][10][11][12][13][14][15]19,20].…”