直到2014年光聚合固化之專利到期後，世界各國學術單位及企業無不積極投入開發及生產，但唯有徹底解決真空吸附力之問題，下照式光聚合固化技術才有機會跨入實際之生產應用。本實驗室過去之研究雖已大幅改善3D列印之分離力之問題，但仍舊無法做出零分離力之技術進一步達成連續列印之目標。
目前矽谷的Carbon3D公司研發出的CLIP技術(Continuous Liquid Interface Production，連續液面生產)，完美的解決分離力之問題，其原理為氧抑制自由基反應，樹脂槽底部的液態樹脂由於接觸氧氣而保持穩定的液態區域，如此就能實現連續列印的概念。本研究將採用類似CLIP技術抑制自由基反應之原理。於陽離子樹脂處建置一電場或磁場，透過控制電場或磁場之強度，使陽離子樹脂光解出的超強質子酸遠離樹脂槽底部，抑制樹脂槽底部產生陽離子聚合反應，形成一層薄薄的不聚合反應之液態區域，以達成零分離力之目標。研究結果發現可以有效地降低列印時產生的分離力，並使得列印的成品完整度提高，其中又以導電薄膜配合環境電場的調控分離力下降最為顯著。期望未來此研究能協助3D列印產業克服目前面臨的列印速度限制，進一步提升3D列印的產業滲透度。

After the expiration of the patent of photopolymerization, the world's academic units and enterprises are actively involved in the development and production. However, there still is one issue we have to solve, Separation force, to bring "bottom up" type Vat polymerization technology to the real application and production. Although the past research in this laboratory has greatly improved the separation force of 3D printing, still can not make zero separation technology to achieve the goal of continuous printing.
So far, Silicon Valley's Carbon3D company developed CLIP technology (Continuous Liquid Interface Production), the perfect solution to the separation force problem. The principle is that oxygen is able to inhibit free radical photopolymerization reactions, and liquid resin at the bottom of the resin tank due to contact with oxygen will maintain stable liquid. Therefore, you can achieve the concept of continuous printing. This study will use a similar concept, an electric field or magnetic field is built around the cationic resin. By controlling the electric or magnetic field strength, the super proton acid from the cationic resin will leave the bottom of the resin tank. Thus, the cationic polymerization reaction at the bottom is inhibited and maintains a stable liquid to achieve zero separation force. The results show that the separation force can be effectively reduced and the integrity of the printed part can be improved. Looking to the future this study will help the 3D printing industry to overcome the current printing speed limit, to further enhance the penetration of the 3D printing industry.

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