近年來3D列印蓬勃發展，當中以材料噴塗成型技術(Material Jetting, MJ)色彩飽和度最佳且精度最高，但是相對機台昂貴、商用樹脂不易購買，且使用材料為低黏度光固化樹脂，而低黏度材料，其強度也較低。因此本研究開發低黏度彩色光固化樹脂配方應用於材料噴塗成型技術，並透過材料特性表現來選擇最佳配方。

本研究以壓克力樹脂為基底，調整寡聚物、單體、交聯劑、光起始劑的組成，並建立低黏度光固化樹脂配方架構，調控關鍵材料性質以確保列印流暢，接著透過拉伸試驗、微小維克氏硬度、體積收縮率、轉化率決定出最佳配方，其中發現到超支化樹脂因特殊結構能有效在保持低黏度下提高材料機械強度，且體積收縮率可達到平均7.612%，並在光起始劑TPO含量3wt%時，轉化率可達到平均72.333%。另外，藉由光學儀器鑑定色彩來控制顏料墨水濃度及色彩呈現，結果發現以C2%、M3%、Y3%、K2%、W3%有最佳色彩呈現。最後使用本實驗室自組光固化式彩色3D列印機印製成品來確立本研究彩色光固化樹脂可應用性。

Material Jetting (MJ) has the better accuracy and color saturation in the 3D printing processes. However, the system is more expensive, and it is not easy to buy the commercial resin. In addition, the model material in this process is the low-viscosity photocurable resin, which may has issues on mechanical properties. Therefore, this study developed color photocurable resin for material jetting, and decided the best formula based on the material properties.

This study used acrylic resin as the base material to adjust the composition of oligomer, monomer, crosslinker and photoinitiator. The best formula was determined by the results of tensile test, micro Vickers hardness, volume shrinkage, and conversion rate. It was found that the hyperbranched resin with the special structure can effectively improve the mechanical strength of the material while maintaining low viscosity, and make the volume shrinkage rate to 7.612%. In addition, when the photoinitiator TPO content is 3wt%, the conversion rate can reach 72.333%.

On the other hand, pigment concentration and color appearance were evaluated by the optical instruments. As a result, it was found that C2%, M3%, Y3%, K2%, and W3% had the best color appearance. Finally, color samples were printed by a self-developed MJ 3D printer to verify the applicability of the color photocurable resin developed in this study.

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