可回復且具抗疲勞性的顆粒型共熔凝膠彈性體： 基於第四型深共熔溶劑與Carbopol，透過離子–微膠螯合 作用實現應變感測功能;Recoverable and Anti-Fatigue Granular Eutectogel Elastomer Based on Type IV DES and Carbopol for Strain Sensing via Ion–Microgel Chelation Mechanism

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Title:	可回復且具抗疲勞性的顆粒型共熔凝膠彈性體：基於第四型深共熔溶劑與Carbopol，透過離子–微膠螯合作用實現應變感測功能;Recoverable and Anti-Fatigue Granular Eutectogel Elastomer Based on Type IV DES and Carbopol for Strain Sensing via Ion–Microgel Chelation Mechanism
Authors:	江佳燁;Jiang, Jia-YE
Contributors:	化學工程與材料工程學系
Keywords:	第四型深共融溶劑;微凝膠;共融凝膠;螯合;彈性體;可回復;抗疲勞;應變感測器;type IV DES;microgel;eutectogel;chelation;elastomer;recoverability;anti-fatigue;strain sensing
Date:	2025-06-17
Issue Date:	2025-10-17 11:09:58 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究開發出一種具備類彈性體特性的非常規顆粒型共熔凝膠（granular eutectogel），由將 Carbopol 微膠體分散於第四型深共熔溶劑（type IV deep eutectic solvent, DES）中所製得。此 DES 由氯化鈣六水合物（CaCl₂·6H₂O）與甘油組成並表現出牛頓流體行為及良好的離子導電性，且隨著 CaCl₂·6H₂O 含量增加，導電性提升而黏度降低。加入 Carbopol 後，原先會相分離的混合系統轉變為均一的凝膠，此轉變歸因於微膠體堆積與 Ca²⁺–羧酸鹽間螯合作用所促進之三維網絡結構的形成，並經由NMR與FTIR加以驗證。當 Carbopol 濃度高於 5 wt% 時，所得系統形成具剪切變稀與降伏應力之弱凝膠；當濃度超過 9 wt% 時，則形成具備明顯應力–應變響應之強凝膠。凝膠之機械性質隨 Carbopol 濃度增加而提升，導電性則相對下降。於 15 wt% Carbopol 的最佳配方中，力學性能與離子導電性達成良好平衡，並展現出優異彈性、小滯後損失、可回復且具抗疲勞能力與低應力衰減等彈性體特徵。作為可穿戴應變感測器時，該共熔凝膠展現出高靈敏度與良好重現性，能有效偵測如手指彎曲、書寫與吞嚥等動作。 ;An unconventional granular eutectogel with elastomer-like behavior was developed by dispersing Carbopol microgels in a type IV deep eutectic solvent (DES) composed of CaCl₂·6H₂O and glycerol. The DESs showed Newtonian fluid behavior and good ionic conductivity, which increased with CaCl₂·6H₂O concentration, while viscosity decreased. Upon Carbopol addition, the system transitioned from a phase-separated mixture to a homogeneous gel, attributed to 3D network formation via microgel crowding and Ca²⁺–carboxylate chelation, confirmed by NMR and FTIR. At concentrations above 5 wt%, the resulting weak gel exhibited shear-thinning behavior with a yield stress, while concentrations above 9 wt% led to the formation of a strong gel, as characterized by its stress–strain response. Mechanical properties improved with increasing Carbopol concentration, though at the cost of reduced ionic conductivity. The optimized 15 wt% eutectogel achieved a balance between mechanical strength and ionic conductivity, exhibiting elastomeric characteristics such as excellent elasticity, minimal hysteresis, low stress decay, good recoverability, and favorable anti-fatigue performance. As a wearable strain sensor, it showed high sensitivity and reproducibility in detecting motions such as finger bending, handwriting, and swallowing.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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