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標題: | 改良不鏽鋼金屬表面及金屬底劑
以提升聚甲基丙烯酸甲酯及不鏽鋼之鍵結強度 Modified stainless steel surfaces and metal primer to enhance bond strength between poly(methylmethacrylate) and stainless steels |
作者: | Yuan-Ling Sun 孫元玲 |
指導教授: | 楊宗傑 |
關鍵字: | 聚多巴胺,四乙氧基矽烷,聚甲基丙烯酸甲酯,樹脂,不鏽鋼,剪力鍵結強度測試,10-(2-甲基丙烯?氧基)磷酸單癸酯, polydopamine,TEOS,Polymethylmethacrylate,resin,stainless steel,shear bond test,bonding strength, |
出版年 : | 2017 |
學位: | 碩士 |
摘要: | 聚甲基丙烯酸甲酯(Polymethylmethacrylate, PMMA)為牙科常見之贗復物材料,多用於活動式局部義齒、全口活動義齒或臨時牙冠等。PMMA其韌性強、剛性較弱之特質,在治療過程中經常與金屬材料搭配使用以加強材料強度,然而PMMA與金屬之鍵結強度極差,必須透過其他黏著塗料作為接著媒介。
本研究將以嘗試不同材料tetraethoxysilane(TEOS)、polydopamine(pDA)改質不鏽鋼金屬表面以提升PMMA與不鏽鋼之黏著強度(bond strength);並以乙醇及丙酮做溶劑,配製不同比例10-methyacryloyloxydecyl dihydrogen phosphate (10-MDP)金屬底劑、調整PMMA之聚合時間及條件,以觀察MDP單體本身之黏著能力,以及尋找較佳之使用方式;此外,亦添加pDA粉末至MDP底劑嘗試改良金屬底劑,以增強黏著強度。 本研究中之黏著強度均由萬能材料試驗機(universal testing machine,Instron-5566)進行剪力黏著強度測試(shear bond strength test),並以電子能譜儀(XPS)分析其斷裂面,以得知其斷裂方式及位置,再使用紅外線光譜儀(ATR-FTIR)檢測PMMA聚合程度,並與剪力黏著強度測試結果比較其相關性。 結果顯示,TEOS分子不論水解或未水解皆無法在不鏽鋼試片上形成適當厚度之完整薄膜,且與不鏽鋼亦無法產生良好鍵結,經由酸洗及鹼洗處理不鏽鋼表面亦無法改善其材料附著能力。自製MDP底劑中,25wt%之MDP底劑且聚合時間為4小時時,可測得Bond strength 11.99±2.4(MPa),為本次所有實驗組別中最佳之黏著強度。在以pDA塗層改質之不鏽鋼試片測試顯示,pDA在不鏽鋼與PMMA間可扮演鍵結之角色,其中5mg/ml dopmaine在所有組別中能達到最佳之黏著強度(2.91±0.7MPa),且polydopamine相較於MDP能有較高之生物相容性,故雖未能超越市售接著劑強度,但仍有其未來發展性。 Polymethylmethacrylate(PMMA) have been used more frequently in dental prosthesis, such as removable partial denture, complete denture or temporary crown. The higher toughness and weaker rigidity of PMMA cause that PMMA has to go with metal material, such as stainless steel. However, the bonding strength between PMMA and stainless steel is so weak that the primer should be used as an adhesion media. Therefore, the purpose of this study is to develop different material—tetraethoxysilane(TEOS), Polydopamine(pDA)—to increase the bonding strength of PMMA and stainless steel; use 10-methyacryloyloxydecyl dihydrogen phosphate(10-MDP) to produce primers with different concentration and try to find a better condition of packing PMMA. Furthermore, we try to enhance bond strength of MDP primer by adding pDA powder. All the bonding strength was tested through shear bond strength test by the universal testing machine(Universal testing machine, Instron-5566). In addition, the analyzation of fracture surface was observed by X-ray photoelectron spectroscopy(XPS)to learned about the fracture type and position , and the degree of polymerization was tested by infrared spectroscopy(ATR-FTIR)was compared with the results of shear bond test to figure out the correlation. The results suggest that TEOS can not form a appropriate thick of film on the stainless steel discs which were even pretreat by acid and alkane. In the group of lab-produce MDP primer, 25wt%MDP whose curing time is 4 hours reveals the highest bond strength in this research. The results of different concentration of dopamine show that 5mg/ml dopamine solution has the highest shear bond strength. Though, the bond strength of 5mg/ml dopamine is not as high as commercial primers’, it literally has better biocompatibility. So, pDA still exhibit its potential for the development of bonding agent in future. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68346 |
DOI: | 10.6342/NTU201703239 |
全文授權: | 有償授權 |
顯示於系所單位: | 口腔生物科學研究所 |
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