本實驗主要是將純棉織物以奈米級二氧化鈦(TiO2)爲催化劑，並以馬來酸酊與檸檬酸之混合液爲交鏈劑，經壓吸後，用紫外光進行光催化以製作無甲醛防縐加工物。本研究是針對催化劑濃度、馬來酸酐與檸檬酸之混合比(MA/CA)、混台酸之濃度以及紫外光照射時間等條件進行加工，以探討棉織物處理加工後的乾與濕縐摺回復角、接枝率、接技效率、白度、強力及柔軟度之變化。由實驗結果得知，棉織物經不同混合催化劑濃度處理後，其縐摺回復角有提昇的現象，尤其在MA/CA混合比70/30時，有最佳之縐摺回復角；在強度與白度方而無明顯降低；接枝率則隨著酸濃度增加有上升的趨勢，另奈米TiO2催化劑當添加濃度達0.8%時，可獲良好的催化效果，若催化劑使用過量不僅效果降低且不經濟：至於光催化之照射時間約30分鐘即可達到加工成效。
Titanium oxide (TiO2) has been known for its strong photocatalytic effect for many chemical reactions. In this paper cotton fabrics were first crosslinked with mixing acids of MA/CA (Maleic Acid/Citric Acid), mixed with the TiO2 nano-particles by the pad-dry-cure process, then exposed with UV light to make nonformaldehyde wrinkle-free products. The main purposes of this study were to find the best amount of TiO2 catalyst the optimum ratio as well as the concentration of MA/CA. and the UV exposure time, etc., so as to correlate them with the fabric properties such as: crease recovery angle under both dry and wet conditions, whiteness and softness maintainability, strength retention, etc. The results show that the crease recovers angle increases with the MA/CA amount and reaches an optimal point at the mixing ratio of 70:30; both strength retention and whiteness are relatively unchanged; while the grafting ratio tends to increase with the increase in the concentration of the mixed acids. As to the TiO2 photocatalytic effect, it was found that the effect was the best at the concentration of 0.8% for exposure or radiation time of 30 minutes.
