纳米碳化硅对3D打印光敏材料性能的影响
宗学文，刘亮晶，叶凡，庞盈
西安科技大学机械工程学院，增材制造技术研究所，西安 710054
Effect of nano-SiC on Properties of 3D Printing Photosensitive Materials
Zong Xuewen, Liu Liangjing, Ye Fan, Pang Ying
Institute of Additive Manufacturing Technology, College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China
摘要：为评价纳米碳化硅(SiC)含量和粒径对光敏树脂基复合材料的黏度、固化特性、收缩率及邵氏硬度的影响，以光敏树脂为基体，不同粒径的纳米SiC为填料，采用硅烷偶联剂KH550对填料进行表面处理，利用面成型光固化3D打印技术制备了光敏树脂/纳米SiC复合材料。结果表明，在相同含量下，增加纳米SiC粒径可降低光敏复合材料的黏度，利于打印过程中树脂的流动。结合Beer-Lambert模型方程发现，填料含量相同时，在相同曝光能量下，添加大粒径SiC的光敏复合材料具有更优的固化深度和固化速度，利于打印成型。不同含量和粒径的纳米SiC对光敏树脂的邵氏硬度和固化收缩作用提升效果不同，随着纳米SiC含量增加和粒径的减小，光敏复合材料的收缩率逐渐降低，成型精度提高，但邵氏硬度会随纳米SiC含量增加先增大后减小，平均粒径为50nm的SiC含量为光敏树脂预聚物质量1%时，光敏复合材料的邵氏硬度即可达到最大值93.1。
Abstract：In order to evaluate the effects of nano-silicon carbide (SiC) content and particle size on the viscosity, curing characteristics, shrinkage and shore hardness of photosensitive resin matrix composites, photosensitive resin was used as matrix, nano-SiC with different particle sizes as fillers, silane coupling agent KH550 as surface treatment agent for treating the fillers, the photosensitive resin/nano-SiC composites were prepared by using surface forming UV-curing 3D printing technology. The results show that photosensitive composites with larger nano-SiC particle size present lower viscosity and facilitate the flow of resin in the printing process at the same nano-SiC content. Combined with Beer-Lambert model equation, it is found that when the filler content is the same, under the same exposure energy, the photosensitive composite with larger nano-SiC particle size displays better cure depth and cure speed, which is conducive to print forming. The effects of nano-SiC with different content and particle sizes on the shore hardness and curing shrinkage of the photosensitive resin are different. With the increase of nano-SiC content and the decrease of nano-SiC particle size, the shrinkage of the photosensitive composite gradually decreases, and the forming accuracy improves, but the shore hardness increases first and then decreases with the increase of nano-SiC content. When the content of nano-SiC with 50 nm of average particle size is 1% of photosensitive resin prepolymer mass, the shore hardness (HD) of the photosensitive composite reaches the maximum value of 93.1.
关键词：光固化3D打印；纳米碳化硅；粒径；复合材料；固化特性；收缩率；硬度
Keywords：UV-curing 3D printing; nano-SiC; particle size; composite; curing characteristics; shrinkage; hardness
基金：国家自然科学基金项目(51875452) ，陕西省重点研发计划项目(2022KXJ-012)
本文引用格式：
宗学文，刘亮晶，叶凡，等.纳米碳化硅对3D打印光敏材料性能的影响[J].工程塑料应用，2022，50(11)：17-24.
Zong Xuewen，Liu Liangjing，Ye Fan，et al. Effect of nano-SiC on properties of 3D printing photosensitive materials[J]. Engineering Plastics Application，2022，50(11)：17-24.
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