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Influence of Al₂O₃ Nanoparticle Addition on a UV Cured Polyacrylate for 3D Inkjet Printing

Graf, Dennis; Burchard, Sven; Crespo, Julian; Megnin, Christof; Gutsch, Sebastian; Zacharias, Margit; Hanemann, Thomas

Abstract:
The brittleness of acrylic photopolymers, frequently used in 3D Inkjet printing, limits their utilization in structural applications. In this study, a process was developed for the production and characterization of an alumina-enhanced nanocomposite with improved mechanical properties for Inkjet printing. Ceramic nanoparticles with an average primary particle size (APPS) of 16 nm and 31 nm, which was assessed via high-resolution scanning electron microscopy (HRSEM), were functionalized with 3.43 and 5.59 mg/m2 3-(trimethoxysilyl)propyl methacrylate (MPS), respectively, while being ground in a ball mill. The suspensions of the modified fillers in a newly formulated acrylic mixture showed viscosities of 14 and 7 mPa∙s at the printing temperature of 60 °C. Ink-jetting tests were conducted successfully without clogging the printing nozzles. Tensile tests of casted specimens showed an improvement of the tensile strength and elongation at break in composites filled with 31 nm by 10.7% and 74.9%, respectively, relative to the unfilled polymer.

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Verlagsausgabe §
DOI: 10.5445/IR/1000093507
Veröffentlicht am 10.04.2019
Originalveröffentlichung
DOI: 10.3390/polym11040633
Coverbild
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2073-4360
KITopen-ID: 1000093507
HGF-Programm 43.22.03 (POF III, LK 01)
Erschienen in Polymers
Band 11
Heft 4
Seiten Article: 633
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 06.04.2019
Schlagworte nanocomposites; nanoparticles; 3D Inkjet printing; ceramic inks
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