Abstract
Silane coupling agents (SCAs) with different organofunctional groups were coated on the surfaces of Al2O3 ceramic particles through hydrolysis and condensation reactions, and the SCA-coated Al2O3 ceramic particles were dispersed in a commercial photopolymer based on interpenetrating networks (IPNs). The organofunctional groups that have high radical reactivity and are more effective in UV curing systems are usually functional groups based on acryl, such as acryloxy groups, methacrloxy groups, and acrylamide groups, and these silane coupling agents seem to improve interfacial adhesion and dispersion stability. The coating morphology and the coating thickness distribution of SCA-coated Al2O3 ceramic particles according to the different organofunctional groups were observed by FE-TEM. The initial dispersibility and dispersion stability of the SCA-coated Al2O3/High-temp composite solutions were investigated by relaxation NMR and Turbiscan. The rheological properties of the composite solutions were investigated by viscoelastic analysis and the mechanical properties of 3D-printed objects were observed with a nanoindenter.
Highlights
Stereolithography (SLA) is a promising 3D printing technology that achieves more precise manufacturing of 3D geometry ceramic parts than other 3D printing methods [1,2]
In this study, we prepared ceramic particles with various interfacial characteristics by controlling the we prepared ceramic particles with various interfacial characteristics by controlling the organofunctional groups of the silane coupling agents, as shown in Figure 1, and we studied the organofunctional groups of the silane coupling agents, as shown in Figure 1, and we studied the rheological properties of theofceramic particles in a liquid photopolymer and the mechanical properties rheological properties the ceramic particles in a liquid photopolymer and the mechanical of 3D-printed propertiesobjects
The viscoelastic results measured by diffusing wave spectroscopy (DWS) in Figure 6 show the rheological behavior of the SCA-coated Al2 O3 /High-temp composite solutions with 30 wt % content of the SCA-coated Al2 O3 ceramic particles with different organofunctional groups
Summary
Stereolithography (SLA) is a promising 3D printing technology that achieves more precise manufacturing of 3D geometry ceramic parts than other 3D printing methods [1,2]. Ceramic surface modification by a silane coupling agent is a typical method for improving interfacial adhesion and dispersion stability [6,7,8,9,10,11,12]. With silane better coupling interfacial agent adhesion photopolymer resingroups, has a positive effect on dispersiongroup. The haswith two akinds of functional an inorganic functional stability, because the surface areas of better interfacial adhesion increase, due to nano-scale effect. Y (methacryloxy, vinyl, glycidoxy, choloro, etc.) is an organic functional group that enhances the Different organofunctional groups in the silane coupling agents create different interfaces and different interaction with polymers through the formation of interpenetrating networks (IPNs). Al2O3 ceramic particles were coated with various silane coupling agents (SCAs) with different organofunctional groups by hydrolysis condensation reactions, and the (SCAs)
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