氯化膽鹼與聚乙二醇300以1:3莫耳比組成之深共熔溶劑在室溫下會形成針狀結晶。然而，加入氣相二氧化矽奈米粒子後，可降低深共熔溶劑之液相線溫度，並提升氯化膽鹼於聚乙二醇300中的溶解度，進而有效抑制相分離現象。所形成之二氧化矽溶膠於聚乙二醇修飾深共熔溶劑中展現剪切稀化行為。當二氧化矽濃度達一定程度時，混合系統會發生溶膠-凝膠轉變，藉由三組分之間的協同作用形成物理型共熔凝膠，並可由核磁共振分析加以驗證。。隨著二氧化矽含量增加，共熔凝膠之屈服應力與儲能模量均顯著提升。儘管二氧化矽能在聚乙二醇300中良好分散，氯化膽鹼的存在降低了二氧化矽與聚乙二醇的親和性，導致二氧化矽顆粒部分聚集並形成三維網絡結構。該共熔凝膠具備優異的流變特性及自癒合能力，展現作為三維列印支撐介質之應用潛力。使用紫外光可固化墨水時，墨水在固化前後均可維持形貌，且於移除共熔凝膠後仍能高保真度地保留最終結構。;PEGylated deep eutectic solvents (DESs), composed of choline chloride (ChCl) and PEG300 in a 1:3 molar ratio, exhibit needle-like crystals at room temperature. However, the addition of fumed silica nanoparticles lowers the liquidus temperature of the DES and enhances ChCl solubility in the PEG300 matrix, effectively suppressing phase separation. The resulting silica sol in the PEGylated DES exhibits shear-thinning behavior. At sufficiently high silica concentrations, the mixture undergoes a sol–gel transition, forming a physical eutectogel through synergistic interactions among the three components, as evidenced by NMR. Increasing the silica content enhances both the yield stress and the storage modulus of the eutectogel. While silica disperses well in PEG300, the presence of ChCl reduces the silica-PEG affinity, leading to partial aggregation of the silica and the formation of a 3D network. The eutectogel’s favorable rheological properties and self-healing ability make it a promising 3D printing support medium. UV-curable inks retain their shape before and after curing, with final structures obtained at high fidelity following eutectogel removal.
