Kang Jiwan, Park Seong Hyeon, Park Keun
Institute of 3D Printing Convergence Technology, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea.
Material Research Center, Carima Co., Ltd., Seoul 07532, Republic of Korea.
Polymers (Basel). 2024 Jan 9;16(2):193. doi: 10.3390/polym16020193.
This study aims to enhance the mechanical properties of additively manufactured polymer parts by incorporating ceramic particles (SiO) into diluted urethane methacrylate (UDMA) photopolymer resin using digital light processing (DLP) technology. The resulting PUMA/SiO composites, featuring varying SiO contents (16.7, 28.5, and 37.5 wt%) and processed under different conditions, underwent a comprehensive series of mechanical, thermal, and chemical tests. Hardness tests showed that composites with 37.5 wt% SiO demonstrated superior hardness with low sensitivity to processing conditions. Bending tests indicated that elevated vat temperatures tended to degrade flexural properties, yet this degradation was mitigated in the case of the 37.5 wt% SiO composition. Tensile tests revealed a transition from viscoelastic to linear elastic behaviors with increasing SiO content, with high tensile strength sustained at low vat temperatures (<35 °C) when the SiO content exceeded 28.5 wt%. Thermogravimetric analysis supported these findings, indicating that increased SiO content ensured a more uniform dispersion, enhancing mechanical properties consequently. Thermal tests showed augmented thermal conductivity and diffusivity with reduced specific heat in SiO-inclusive composites. This study provides guidelines for optimal PUMA/SiO composite utilization that emphasizes high SiO content and low vat temperature, offering comprehensive insights for high-performance ceramic composite fabrication in functional applications.
本研究旨在通过使用数字光处理（DLP）技术将陶瓷颗粒（SiO）掺入稀释的聚氨酯甲基丙烯酸酯（UDMA）光聚合物树脂中，以提高增材制造聚合物部件的机械性能。所得的PUMA/SiO复合材料具有不同的SiO含量（16.7、28.5和37.5 wt%），并在不同条件下进行加工，随后进行了一系列全面的机械、热和化学测试。硬度测试表明，SiO含量为37.5 wt%的复合材料表现出优异的硬度，且对加工条件的敏感性较低。弯曲测试表明，升高的料槽温度往往会降低弯曲性能，但对于SiO含量为37.5 wt%的组合物，这种降解得到了缓解。拉伸测试表明，随着SiO含量的增加，材料从粘弹性行为转变为线性弹性行为，当SiO含量超过28.5 wt%时，在低温料槽温度（<35°C）下可保持较高的拉伸强度。热重分析支持了这些发现，表明增加SiO含量可确保更均匀的分散，从而提高机械性能。热测试表明，含SiO的复合材料的热导率和热扩散率增加，比热降低。本研究为最佳PUMA/SiO复合材料的利用提供了指导方针，强调高SiO含量和低温料槽温度，为功能应用中的高性能陶瓷复合材料制造提供了全面的见解。
