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Proceedings Paper

Renewable materials as 3D photostructurable resins employing 405 nm tabletop dynamic projection lithography (Conference Presentation)
Author(s): Edvinas Skliutas; Sigita Kašetaite; Linas Jonusauskas; Jolita Ostrauskaite; Mangirdas Malinauskas

Paper Abstract

Optical three-dimensional printing (O3DP) have become an advanced and widespread technology for the realization of 3D computer aided models (CAD) to free-form objects. It has evolved to desktop stereolithographic (SLA) devices allowing rapid, accurate and high spatial resolution prototyping out of photoreactive resins. Most of commercially available resins are not cheap and often of unknown chemical ingredients, which limits their wider applicability. Recent advances have shown that renewable raw materials can be applied for preparation of polymers. For example, glycerol, the by-product of biodiesel refining, is a promising candidate which can be used as monomer in the synthesis of bio-based resins as it is or after chemical modification [1]. The primary substance for the photosensitive material was chosen glycerol diglycidyl ether (GDGE) [2]. The following composition was: GDGE, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate (30 mol %), radical (phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide) and cationic (diphenyliodonium hexafluorophosphate) photoinitiators and N-vinylcarbazole as an additive. Autodesk’s open source 3D optical printer Ember (AutoDesk) employing 405 nm light was implemented for dynamic projection lithography (DPL). It allowed selective photopolymerization on demand, later followed by characterization of various photosensitive materials. The bio-based resin was compared to standard materials: Formlabs Clear and Autodesk PR48. It turned out, that the resin had much longer curing time (>10 min for a single layer). Despite this fact, fine structural features were formed and their morphology was characterized using optical profilometer and scanning electron microscopy. It was assessed, that by increasing energy dose, higher structures were acquired and this dependency is linear, thus enabling tabletop graytone lithography out of renewable bioresins.

Paper Details

Date Published: 14 March 2018
Proc. SPIE 10544, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XI, 105440R (14 March 2018); doi: 10.1117/12.2286596
Show Author Affiliations
Edvinas Skliutas, Vilnius Univ. (Lithuania)
Sigita Kašetaite, Kaunas Univ. of Technology (Lithuania)
Linas Jonusauskas, Vilnius Univ. (Lithuania)
Jolita Ostrauskaite, Kaunas Univ. of Technology (Lithuania)
Mangirdas Malinauskas, Vilnius Univ. (Lithuania)

Published in SPIE Proceedings Vol. 10544:
Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XI
Georg von Freymann; Winston V. Schoenfeld; Raymond C. Rumpf, Editor(s)

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