本研究第一部分將草本來源的果皮廢棄物以水熱法結合石臼研磨法製備CNF，取代傳統成本高及耗費大量的溶劑的酸解法及 Tempo 氧化法；本研究第二部分利用濕式紡絲技術，將所製備 之CNF來強化TAC廢棄物，達到結合兩種廢棄物再利用循環之目的，藉由濕式紡絲參數優化使 CNF/TAC複合纖維之強韌性得以再提升，進而使纖維得以細化。
胡蘿蔔渣及檸檬皮經由水熱法處理後，成功去除塊狀之果膠及非纖維素的成分，石盤間隙調整至0.16mm纖維逐漸細化至奈米等級直徑分別為46nm及61nm，奈米纖維素溶液24小時後皆無分層；隨著研磨參數石盤間隙接觸式增加，聚合度隨之降低，因研磨時產生的高剪切力，葡萄醣鏈的斷裂所導致。
XRD觀察顯示纖維素I的結晶型態，研磨過程添加鹼液並沒有改變纖維素結晶型態，結晶度方面胡蘿蔔渣及檸檬皮奈米纖維素在水熱法處理後分別從原樣33%及30%提升至52%及50%顯示有良好的純化，石臼研磨處理後分別提升至68%及64%證實石臼式研磨可有效的破壞纖維素非結晶區。熱性質方面，經水熱及研磨處理後，熱性質有逐漸提升。FT-IR分析顯示，其官能基在1733 cm-1 處特徵峰值有降低的現象，表明水熱法除去半纖維素，此外研磨後OH峰值強度增加，纖維素奈米化後暴露出更多的羥基。
不同生質來源的胡蘿蔔渣、檸檬皮、紙漿CNF/TAC纖維由濕式紡絲成功獲得，纖維強度提升由TAC纖維1.75g/den分別增強至胡蘿蔔渣2.31 g/den、檸檬皮2.23 g/den、紙漿2.06 g/den，證實本研究經連續式石臼研磨製程之CNF可使回收TAC得以增強；CNF/TAC纖維經延伸3倍及4倍後，丹尼數皆有下降，分別為6.3D及14.7D，在較快收卷速度下進行延伸，使順向度從0.22提升至0.55，強度隨之提升至2.63 g/den，纖維截面形狀因凝固浴添加30%溶劑後，纖維截面可從啞鈴狀控制改變至圓形。

Nowadays, the preparation of CNF mainly uses traditional acid hydrolysis and Tempo oxidation for wood pulp or wood. In order to solve the high cost of these two CNF separation methods and consume a lot of solvents. In the first part of this research, a low-concentration solvent hydrothermal method combined with a continuous stone grinding method was developed to prepare CNF by using carrot residues and lemon peel. On the other hand, the production of polarizers produces a lot of TAC waste, which has low strength and poor durability. Therefore, the second part of this research using CNF prepare by stone grinding to reinforce the recycled cellulose triacetate by wet spinning technology, achieving the purpose of combining two types of waste recycling.
After the carrot pomace and lemon peel are treated by hydrothermal method, the massive pectin and non-cellulose components are successfully removed. The gap between the stone discs was contacted to 0.16mm, the fibers were gradually refined to nano-grade diameters of 46nm and 61nm, respectively. Cellulose Nanofiber solution indicating good disperse after 24 hours. As the grinding parameters increase the gap between the stone discs, the degree of polymerization decreases due to the high shear force generated during grinding and lead the glucose chain broke.
XRD result showed cellulose I typical polymorph. The addition of alkaline liquid during the grinding process did not change the crystalline form of cellulose. After hydrothermal treatment, carrot residues and lemon peel cellulose nanofiber have improved the crystallinity index from 33% and 30% to 52% and 50% respectively, showing good purification. The grinding treatment increased the crystallinity index to 68% and 64% respectively, confirming that the process can effectively destroy the amorphous cellulose area. In terms of thermal properties, the thermal properties are gradually improved after hydrothermal and grinding treatments. FT-IR result showed the functional group at 1733 cm-1 decreased, indicating that the hydrothermal method removed hemicellulose, and the intensity of the OH peak increased after grinding treatment, exposing more hydroxyl groups when cellulose refined to nanosize.
Carrot residue, lemon peel, and pulp CNF/TAC fibers of different biomass sources were obtained by wet spinning. The fiber strength increased from 1.75 g/den of TAC fiber to 2.31 g/den of carrot residues, 2.23 g/den of lemon peel, and 2.06 g/den of pulp, which confirmed that CNF prepare by stone grinding in this study is a good reinforcing material.
The draw ratio had significant influence on the linear density of the CNF/TAC fiber. The fiber decrease the denier to 6.3D and 14.7D was achieved at draw ratio of 3 and 4 respectively. The drawing process is carried out at a faster winding speed, and the degree of orientation index increased from 0.22 to 0.55, and the strength achieved at 2.63 g/den. After 30% solvent is added into coagulation bath, the cross-section of the fiber can be controlled from a dumbbell shape to a round shape.

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