本研究先以馬來酸酐構造為連結基與聚乙二醇十八烷基醚反應形成兩邊對稱結構之界面活性劑，再導入陰離子基團於連結基處而合成一系列改質雙分子界面活性劑。所合成的產物以紅外線光譜分析（FT-IR）、核磁共振光譜（1H-NMR）確認其構造，所測試之界面性質包括表面張力、接觸角與起泡性，並與傳統單分子界面活性劑比較其性質差異。實驗中並測試pH緩衝能力、分散性、乳化性、精練性與染料相互作用等性質。
由界面活性結果顯示合成產物較傳統單分子界面活性劑具有較低的表面張力、臨界微胞濃度、表面吸附濃度與分子佔有面積，並具有較佳的濕潤性與低起泡性，顯示合成產物之雙分子構造具有較佳的界面性質。從乳化性質分析結果得知，分子佔有面積較小之合成產物可使分子緊密吸附於油滴表面而具有較佳之乳化安定性。從精練實驗結果得知，合成產物之濕潤性較佳者可使棉胚布經加工後得到較高之白度值與吸水性。經測試合成產物與分散染料的結合粒徑分佈及高溫分散性，結果顯示添加合成產物於染液中可使染料粒徑分佈均一，具有良好的分散能力，且在高溫環境下可避免染料粒子二次凝集現象，使染液在高溫狀態下染料粒子仍然具有良好分散性。探討此系列產物與分散染料、直接染料間之相互作用，從分散染料染液之可見光光譜圖結果顯示吸收光譜存在isospestic point且λmax產生偏移，代表合成產物與分散染料分子形成複合體，且隨著合成產物濃度增加，染液吸光度上升，可看出染料在水中之凝集現象因界面活性劑之加入產生分散、溶解作用與形成複合體結構，因而使光譜吸光度增加。
研究中並針對添加合成產物於TiO2懸浮液中分散性之參數，討論不同參數對奈米粒子分散性的影響，經由結合田口式實驗規劃法分析分散均一的最佳化控制參數，以適用奈米粒子分散液塗佈加工之應用需求。

In this study, the Gemini surfactant was appended to maleic anhydride through condensation with polyoxyethylenated stearyl ether; anionic hydrophilic moieties were obtained after modifying the spacer units with sodium hydrogen sulfite groups to form a series of modified Gemini surfactants. The molecular structures of these surfactants were confirmed by 1H-NMR and FT-IR. The surface activities were evaluated by surface tension, contact angel, foaming properties, and compared with traditional single-molecule surfactants. The pH buffer capacities, emulsion, dispersibilities, scouring and dye-surfactant interactions were also investigated. Surface tension results exhibited that surfactants have lower surface tension, cmc, surface excess concentration and occupied area per molecule, moreover, these compounds own better wetting and lower foaming than traditional surfactants due to the molecular structures of surfactants are Gemini structure. From emulsion results, the lower value of occupied area per molecule indicated that molecules packed close on oil surface and resulted in better emulsion stability. We have also studied the dispersing abilities of these surfactants toward commercial disperse dyes at elevated temperature. From measurements of the particle sizes and the dispersibilities of the dye solutions, we found that the surfactants exhibited good surface activities and dispersibilities. We used spectrophotometry to investigate the interactions between the dyes and the surfactants in the dye bath. In the case of each of the three kinds of disperse dyes and three kinds of direct dyes, the absorbance of the dye solutions in the presence of the surfactants were higher than those in its absence because of the dispersion, dissolution and forming complex.
The difference mainly results from TiO2 dispersion adding surfactants which could provide accuracy in controlling size and offer a simple production procedure. Meanwhile, the research also discusses how different parameters affect the particle size distribution. The study uses Taguchi Experimental Design Method so that the most adequate parameters could be predicted and applied to coating process using TiO2 dispersion solution.

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