| 摘要: | 本論文主要以金屬有機骨架材料（MOF）作為實驗材料，並使用羧甲基纖維素鈉（CMC-NA）作為賦形劑，實驗設備為工研院提供濕式籃式進料擠出機和球形搓圓機，將對MOF粉體進行擠出滾圓(Extrusion Spheronization)的濕式造粒。通過調整濕粉團水分含量、賦形劑濃度、賦形劑固含量、擠出機主軸轉速、擠出機篩網孔洞大小、滾圓機轉速、滾圓機負載量等，其最終目的在於探討擠出滾圓製程的機制，透過改變不同造粒參數來提升MOF顆粒的品值，本實驗將針對最終顆粒之尺寸分布、顆粒縱橫比、顆粒強度、顆粒速度場等探討其相關造粒機制。
實驗結果顯示水分含量為擠出滾圓造粒相當關鍵的參數，當水分含量過低時，擠出物會變得酥脆，無法順利形成球形顆粒，導致圓柱狀擠出物破裂成細粉。若水分含量過高，擠出物會呈現黏滯狀態，使顆粒過快地互相黏結，形成過大的團聚顆粒。只有在水分含量適中時，擠出物才會具有適合塑形的塑性，能夠在滾圓過程中逐漸形成均勻且緻密的球形顆粒。此外，擠出機主軸轉速、篩網孔洞尺寸、滾圓機負載量等操作參數也對合格的MOF顆粒品質具有重要影響，這些參數在本文也將更詳細的討論。
;This thesis primarily focuses on using Metal-Organic Framework (MOF) materials as experimental subjects, with sodium carboxymethyl cellulose (CMC-NA) as a binder. The experimental equipment, provided by the Industrial Technology Research Institute (ITRI), includes a wet basket-feed extruder and a spheronizer, which are used for wet granulation of MOF powders through extrusion spheronization. By adjusting various parameters such as the moisture content of the wet mass, binder concentration, binder solid content, extruder shaft speed, extruder screen size, spheronizer speed, and spheronizer load, the ultimate goal is to investigate the mechanism of the extrusion spheronization process. This is achieved by altering different granulation parameters to enhance the quality of MOF granules. This study specifically examines the granulation mechanism related to the final particle size distribution, particle aspect ratio, particle strength, and particle velocity field.
The experimental results indicate that moisture content is a crucial parameter for extrusion spheronization granulation. When the moisture content is too low, the extrudate becomes brittle and cannot form spherical granules properly, resulting in the cylindrical extrudate breaking into fine powder. Conversely, if the moisture content is too high, the extrudate becomes viscous, causing the granules to stick together too quickly, leading to the formation of oversized agglomerates. Only with an appropriate moisture content does the extrudate exhibit suitable plasticity, allowing for the gradual formation of uniform and dense spherical granules during the spheronization process.Furthermore, the operating parameters such as the extruder spindle speed, screen hole size, and granulator load significantly influence the quality of the MOF granules. These parameters will be discussed in more detail in this thesis. |
