The effect of the surfactants on the formulation of UV-curable SLA alumina suspension |
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| Affiliation: | 1. Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, School of Material Science and Engineering, Tianjin University, NW, Tianjin 300072, China;2. School of Material Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China;1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China;2. Epstein Department of Industrial and Systems Engineering, University of Southern California, Los Angeles, CA, USA;1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China;2. Epstein Department of Industrial and Systems Engineering, University of Southern California, Los Angeles, CA, USA;1. Materials Research Centre, Indian Institute of Science, Bangalore-560012, India;2. Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore-560012, India;3. Central Manufacturing Technology Institute, Bangalore-560022, India;1. State Key Laboratory for Manufacturing Systems Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, 710054 Xi’an, Shaanxi, China;2. National laboratory of broadband gap semiconductor technology, School of Microelectronics, Xi ''an University of Electronic Science and Technology, 710126 Xi ''an, Shaanxi, China;3. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu, Sichuan, China;4. Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK |
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| Abstract: | Stereolithography (SLA) has been regarded as the most promising rapid prototype (RP) production method for ceramic parts recently because of its better precision in size and site control. The rheological behavior and curing behavior of suspensions are controlling factors for ceramic stereolithography. In this work, oleic acid (OA), stearic acid (SA) and Poly(Acrylate Ammonium) (PAA-NH4) were studied as the surfactant for HDDA-based suspension formulation. Modified alumina particles exhibit different wettability with HDDA monomer and thus the different rheology behavior and stability between the formulated suspensions. OA shows the best performance among all three dispersants. 40 vol% alumina suspensions with a viscosity ˂3 Pa s at 30 s−1 shear rate were successfully formulated with OA and SA. A sintering density of 95% can be reached for the OA- and SA-modified alumina UV-curable resins. |
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| Keywords: | Ceramic stereolithography Rheology Cure profiles |
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