近幾年來由於環境衛生與生態環保意識的抬頭，傳統溶劑型PU樹脂(聚胺基甲酸酯)有逐漸被水性PU樹脂所取代的趨勢，因為這兩種PU樹脂的應用方式相似，只是後者屬環境友善產品並無造成環境污染的困擾。然而，水性PU樹脂的性質，譬如水性樹脂的低分子量、機械性、耐熱性等應用性質等仍有許多地方無法與傳統溶劑型PU樹脂相比擬。為了解決水性PU在這些性質上的不足，本研究利用奈米二氧化鈦之特有性質，如高強度、高剛性、高硬度、耐高溫、耐燃性佳、良好的抗腐蝕能力、穩定的化學性質等特性，在混入水性PU後製成水性PU/奈米二氧化鈦之奈米複合材料，可以有效強化水性PU之機械與熱性質，使得水性PU樹脂應用更為廣泛。
In recent years, due to environmental health and eco-consciousness, the traditional solvent-based PU (polyurethane) resin has gradually been replaced by waterborne PU resin trends. Althought these two PU resin application mode were similar latter did not result in an environmental friendly product environment pollution problems. However, the properties of the waterborne PU resins, such as low molecular weight of the aqueous resin, the mechanical properties, and the thermal resistance properties, cannot be compared with the conventional solvent-based PU resin. In order to solve the lack of the properties of the waterborne PU, this research using the relationship properties of nano-TiO2, including high strength, high modulus, high hardness, thermal resistance, flame resistance, good corrosion resistance and stable chemical properties, after mix with waterborne PU to manufacture waterborne PU/nano-TiO2 nanocomposites. It can be effectively enhanced the mechanical and the thermal properties of waterborne PU, and making the application of waterborne PU resin applied more widely.
