本研究計晝目的在於將市面上回收之PLA材料進行親水化改質，形成包括非離子 基團與陰離子基團之生物可分解高分子型界面活性劑，實驗先以聚乙二醇與SIPM及 DMPA反應形成對稱結構，藉此加大親水基團分子量，再與回收PLA進行熔融聚合反 應，使改質PLA界面活性劑分子結構具有乙二醇鏈段與磺酸鈉或羧酸等陰離子基團。 接著探討其界面性質，包含表面張力、臨界微胞濃度、濕潤性、乳化性、pH緩衝能力 及黏度與導電性，建立界面科學基礎數據，應用性質方面，測試其與直接染料相互作用， 並分析其對棉織物染色性影響。藉此研究希望可解決目前產業上PLA回收之再利用問 題，增進產業應用性，並而提高回收物附加價值。
The main purpose of this plan is to prepare biodegradable surfactant by hydrophilic modified PLA. A series of anion-nonionic surfactants by the reaction of polyoxyethylenated stearyl ether, SIPM and DMPA, the structure change of theses cleavage products are confirmed by IR and UV spectra analysis. The fundamental surface activity including surface tension, foaming, contact angle and viscosity are studied. Experimental results have confirmed that products are slowly degraded by direct photolysis.The surface-activities including surface tension, cmc, wetting, emulision, pH buffer capacities, dispersibilities, scouring and other properties are measured to build database, and than application in cotton dyeing process. Hydrophilic modified PLA can used as modifier to improve the toughness of PLA material.
