研究生: |
周雅欣 Ya-Shin Chou |
---|---|
論文名稱: |
矽烷偶合劑接枝之氧化石墨烯及熱脫層氧化石墨烯之合成及探討其對不飽和聚酯樹脂之聚合固化樣品微觀型態結構、体積收縮、機械性質、熱傳導及導電性質的影響 Synthesis of silane-grafted graphene oxide (sg-GO) and silane-grafted thermally reduced graphene oxide (sg-TRGO), and their effects on cured sample morphologies, volume shrinkage, mechanical properties, and thermal and electrical conductivities for unsaturated polyester resins |
指導教授: |
黃延吉
Yan-Jyi Huang |
口試委員: |
陳崇賢
Chorng-Shyan Chern 邱文英 Wen-Yen Chiu |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2020 |
畢業學年度: | 108 |
語文別: | 中文 |
論文頁數: | 238 |
中文關鍵詞: | 氧化石墨烯 、熱脫層氧化石墨烯 、矽烷接枝之氧化石墨烯 、矽烷接枝之熱脫層氧化石墨烯 、不飽和聚酯樹脂 、抗收縮劑 、聚合固化 、體積收縮 、機械性質 、熱傳導性質 、導電性質 、接枝效率 |
外文關鍵詞: | graphene oxide, silane-grafted graphene oxide, thermally reduced graphene oxide, silane-grafted thermally reduced graphene oxide, low-profile additive, unsaturated polyester resin, curing, volume shrinkage, mechanical properties, grafting efficiency |
相關次數: | 點閱:608 下載:7 |
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本文探討添加氧化石墨烯(GO)、矽烷接枝氧化石墨烯(sg-GO)、熱脫層氧化石墨烯(TRGO)以及矽烷接枝熱脫層氧化石墨烯(sg-TRGO)等數種特用添加劑的合成及其對苯乙烯(St)/不飽和聚酯樹脂(UP, MA-PA-PG型) /特用添加劑三成份系統於110℃性恆溫固化之微觀型態結構、體積收縮、機械性質、熱傳導及導電性之影響。
GO是將平均粒徑為75μm的天然石墨粉以改良式Hummers 法製得;熱脫層氧化石墨烯(TRGO) 則是將氧化石墨烯(GO)置於1050℃的高溫爐中、氬氣環境下30秒熱脫層而得。
矽烷接枝氧化石墨烯(sg-GO)為帶有乙烯基團的矽烷偶合劑,即甲基丙烯醯氧丙基三甲氧基矽烷(MPS),做為表面改質劑,在GO(or TRGO)/MPS/甲苯三者的重量比為1:5:994下,每次對氧化石墨烯(GO)於100℃下進行表面處理3hr,以不同懸浮天數得到不同接枝率之sg-GO,TRGO則是懸浮一天。另外,亦利用FTIR計算sg-GO、sg-TRGO接枝密度,最後吾人將合成之添加劑(GO, sg-GO, TRGO, sg-TRGO)添加到UP(MA-PA-PG, AN=30)中,亦研究其對St/UP(MA-PA-PG)/添加劑三成分系統聚合固化後之體積收縮、機械性質、熱傳導及導電性之影響。其中GO、sg-GO在混入不飽和聚酯樹脂前會使用磁石攪拌7天,TRGO、sg-TRGO則是攪拌1天。
本研究會使用FTIR鑑定官能基、藉由TGA鑑定熱穩定性、利用XPS鑑定石墨、GO、TRGO之官能基並計算碳元素與氧元素之比例、使用AFM測定GO分別在丙酮、甲苯以及去離子水溶液中,於不同懸浮天數下,GO的厚度大小,結合XRD之鑑定結果,計算出GO之層間距後推論出在不同懸浮天數下GO的脫層情況。
The effects of graphene oxide (GO), silane-grafted graphene oxide (sg-GO), thermally reduced graphene oxide (TRGO), and silane-grafted thermally reduced graphene oxide (sg-TRGO) as special additives on the cured sample morphologies, volume shrinkage characteristics, mechanical properties, thermal properties, and electrical conductivity for low-shrink unsaturated polyester resins (UP, MA-PA-PG type) cured at 110℃ were investigated.
The TRGO was produced by placing the GO in a high-temperature furnace kept in Ar environment at 1050 ℃ for 30 s, which was synthesized from natural graphite powder with average particle size of 75 μm by a modified Hummers method. The sg-GO was synthesized by using the silane coupling agent bearing C=C bonds, namely, γ-methacryloxy propyl trimethoxy silane (MPS), as a surface modifier for the surface treatment of GO at 100℃ for 3 hr with different days of GO dispersion for surface treatment between GO and MPS, and with a fixed weight ratio of GO/MPS/solvent at 1:5:994, TRGO/MPS/solvent at 1:25:974. The grafting density of MPS on the GO or TRGO has been measured by FTIR.
Finally, the effects of additives synthesized, such as, GO, sg-GO, TRGO, and sg-TRGO, on the volume shrinkage, mechanical properties, and thermal and electrical conductivities for the styrene (St) / unsaturated polyester resin (UP, MA-PA-PG, AN=30)/additive ternary systems after the cure have also been investigated. Also, we had stirred additives before combining with UP by magnetic bar for 7 days (GO, sg-GO) and 1 day(TRGO, sg-TRGO) individually.
We used FTIR to characterize functional groups, and to identify thermal properties by TGA. Then functional groups of pristine graphite(PG), GO, TRGO were characterized by XPS and the ratio of carbon and oxygen in graphite, GO, and TRGO were calculated. Also, the thickness of GO that had been disperised for different days in acetone, toluene, and DI water individually was measured by using AFM and XRD.
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