以氧化石墨烯改質層狀雙氫氧化合物添加於聚醋酸乙烯酯奈米複材之製備與其性質探討

Preparation and Characterization of Graphene Oxide Modified Zn-Al LDHs/PVAc Nanocomposites

楊承諺(Cheng-Yen Yang)

指導教授 ： 蔡宗燕

中原大學/理學院/化學研究所/碩士(2020年)

https://doi.org/10.6840/cycu202000685

摘要

本研究使用兩種層狀雙氫氧化合物，一為鋅鋁層狀雙氫氧化合物二為鎂鋁層狀雙氫氧化合物，使用氧化石墨烯、十二烷基硫酸鈉和十二烷基苯磺酸鈉製備插層型層狀雙氫氧化合物；使用X-光繞射儀檢測層狀雙氫氧化合物之層板間距離的變化，傅立葉紅外線光譜儀檢測改質前後的特徵峰，而場發式電子顯微鏡能夠觀察層狀雙氫氧化合物之表面型態，再以熱重分析儀計算改質劑的插層量與耐熱性質，並將改質後的層狀雙氫氧化合物添加於使用原位聚合法的聚醋酸乙烯酯中，再塗佈於鋁板上製成薄膜，比較不同改質劑以及是否添加氧化石墨烯對高分子性質的影響，使用X-光繞射儀、穿透式電子顯微鏡觀測層狀雙氫氧化合物在高分子內的分散型態，以熱重分析儀和差式掃描熱量儀探討奈米複材之熱性質變化，而MgAl SDBS GO系統中，添加2.0 phr 為提升至最高，由210.3℃上升至285.3℃，而玻璃轉化溫度(Tg)則是MgAl SDBS GO添加量1.0 phr，由22.0℃上升至28.4℃，而拉伸強度是MgAl SDBS GO添加量為1.0 phr時，由5.5 MPa提升至16.3 MPa，百格測試附著度檢驗奈米複材於已塗佈環氧樹脂的鋼板時之附著強度，添加各個奈米複材於1.0 phr時，附著度都能維持在4B，而添加至2.0 phr時下降至3B，而以大氣(LOI = 21)的條件下進行燃燒秒數的測試，於MgAl SDBS GO添加1.0 phr時，由40.6秒上升至120.4秒。
本研究的探討以原位聚合法添加層狀雙氫氧化合物，而有效提升聚醋酸乙烯酯的熱性質、機械性質、以及耐燃性質，且在燃燒測試方面效果有明顯的提升，上述的特性使得聚醋酸乙烯酯在水性防火塗料上有更廣泛的應用。

關鍵字

層狀雙氫氧化合物 ； 聚醋酸乙烯酯 ； 氧化石墨烯 ； 奈米複合材料

並列摘要

In this study, there are two Peinds of layered double hydroxides applied, which one is ZnAl layered double hydroxides and the other is MgAl layered double hydroxides, prepared by using graphene oxide, sodium lauryl sulfate and sodium dodecylbenzenesulfonate intercalated layered double hydroxides. X-ray diffractometer is applied to measure the change in the distance between the layers of layered double hydroxides. Fourier infrared spectrometer provides the characteristic peaks before and after modification. The field emission electron microscope can observe the surface morphology of the layered double hydroxide, and then by using a thermogravimetric analyzer to calculate the amount of intercalation of the modifier, and add the modified layered double hydroxide to the insitu certified polyvinyl acetate. Then, this nano composites in the ester, then were coated on the aluminum plate to form a film. The effects of different modifiers and whether graphene oxide added or not for the polymer properties will be discussed and observed the layered dihydrogen oxide using an X-ray diffractometer and a transmission electron microscope. The dispersion pattern of the compounds in the polymer, the thermogravimetric analyzer and the differential scanning calorimeter were used to discuss the thermal properties of the nanocomposites. In the MgAl SDBS GO system, 2.0 phr was added to increase the heat resistance to the highest level, T5d from 210.37℃ to 285.36°C, and the glass transition temperature(Tg) is 1.0 phr of MgAl SDBS GO added from 22.01°C to 28.42°C, and the tensile strength is increased from 5.57 MPa to 16.31 MPa when the added amount of MgAl SDBS GO is 1.0 phr. The adhesion of the nanocomposite is tested on the epoxy per-treated steel plate by the adhesion test. When adding each nanocomposite at 1.0 phr, the adhesion can be maintained at 4B, and when added to 2.0 phr, it drops to 3B, and the atmospheric ( LOI = 21) under the conditions of burning seconds test, when MgAl SDBS GO added 1.0 phr, from 40.6 seconds to 120.4 seconds.
In this study, the method of adding layered double hydroxides in situ can effectively improve the thermal properties, mechanical properties, and flame resistance of polyvinyl acetate, and the effect of combustion testing has been significantly improved. The above characteristics make Polyvinyl acetate is more widely used in waterborne fire retardant coatings.

並列關鍵字

Zn-Al LDHs ； PVAc ； Graphene oxide ； Nanocomposites

參考文獻

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