| 摘要: | 本研究使用雷射雕刻後的 PMMA 試片,並將一側均勻塗佈有機溶劑
(異丙醇)進行鍵合,並放入微波腔體中,待鍵合完成後,觀察微流道鍵合
狀況。由於 PMMA 對有機溶劑的溶解度隨溫度變化而改變,微波時間長
短也將影響材料吸收微波的程度。使用拉伸試驗機對試片鍵和強度進行檢
測,再以 XPS 和 AFM 對試片表面結構進行分析,說明其鍵合原理,最後
注入液體觀察液體在微流道中的狀況,液體在流道中維持穩定層流狀態。
經過實驗測試發現微波時間的增加,促進異丙醇與 PMMA 表面反應,使
試片表面產生足夠的溶脹層,將利於增加鍵合強度,也因溫度的變化讓試
片鍵合時的氣泡減少,而拉伸強度也隨微波時間增加而提升。;In this study, PMMA specimens were laser engraved, and one side was evenly coated with an organic solvent (isopropyl alcohol) for bonding process. The specimens then placed in a microwave chamber for bonding, and the microfluidic bonding condition was observed after the bonding was completed. Since the solubility of PMMA to the organic solvent changes with temperature, the microwave processing time of will also affect the degree of microwave absorption of the material. The bonding strength of the specimens was examined using a tensile tester, and the surface structure of the specimens was analyzed by XPS and AFM to illustrate the bonding principle. Finally the liquid was injected to observe the condition of the liquid in the microfluidic channel, and the liquid maintained a stable laminar flow in the channel. After the experimental test, it was found that the increase of microwave time promoted the reaction between isopropyl alcohol and PMMA surface to produce enough dissolved layer on the surface of the specimen, which would be favorable for the increase of bonding strength, and the change of temperature would reduce the air bubbles during the bonding of the specimen, and the tensile strength also increased with the increase of microwave time. |
