本研究利用泛用型的環氧樹脂(DGEBA)與經有機改質過的黏土(I30P)製備出epoxy/clay奈米複合材料，並探討添加不同I30P重量濃度(1-5wt%)及不同製備方法對整體奈米複材的影響。經由各種儀器的分析，探討奈米複材的各種性質並與純環氧樹脂基材做比較。由熱重分析儀器(TGA)的結果顯示，隨著I30P黏土含量的增加，熱裂解溫度(Td)會有些微下降的趨勢。利用XRD及TEM來觀察奈米複材的微結構及形態學分析，從XRD分析圖及TEM影像圖中可以發現，I30P黏土已進入到環氧樹脂基材的網狀結構中，並從分散相的角度來看，證實已達到奈米級的epoxy/clay複合材料。而奈米複材的尺寸安定性，可由熱機械分析儀器(TMA)進行量測，其量測結果顯示，epoxy/clay奈米複材的熱膨脹係數(CTE)將隨著I30P黏土含量的增加而會逐漸地減少。此外，我們更透過拉伸試驗(tensile test)及動態機械分析儀(DMA)來探討添加I30P黏土對奈米複材機械性質及熱性質的影響。由實驗結果顯示，epoxy/clay奈米複材中的拉伸模數及儲存模數將隨著I30P黏土添加量的愈多而會有明顯上升的趨勢，然而對epoxy/clay奈米複材中的拉伸強度及玻璃轉移溫度(Tg)而言，添加I30P黏土並沒有明顯增加的效果。 In this study, the epoxy/clay nanocomposites were prepared to investigate the effects of the contents of clay and different preparation methods on their physical/chemical properties. A conventional epoxy resin(DGEBA) was reinforced by adding the organically modified layered clay(I30P) with variations content of 1-5wt.%. Neat epoxy resin and the nanocomposites were characterized by using different techniques. TGA results showed that the slightly decreasing in Td with the increase of clay contents. XRD and TEM were used to study the structure and morphology of the nanocomposites, which confirmed that the nanometer-scale dispersion of clay particles within the crosslinked epoxy-resin matrix. The dimensional stability of the nanocomposites was investigated by using TMA, which revealed the steadily decreasing in CTE with the increase of clay contents. Furthermore, mechanical and thermal properties were studied by using the tensile test and DMA. Experimental results showed that the properties of the epoxy resin were changed evidently because of the clay loading. The tensile modulus and storage modulus of the nanocomposites increased gradually with the increase of clay loading. However, no improvement in tensile strength and Tg were observed.
