以同步輻射硬X光誘導聚合反應生成聚甲基丙烯酸甲酯混成材料之研究

Synthesis and Characterization of Synchrotron Radiation Hard X-ray Induced Polymerization of Poly(methyl methacrylate) Hybrid Materials

劉惠文(Huey-wen Liou)

指導教授 ： 林鴻明 ； 胡宇光

大同大學/工程學院/材料工程學系所/博士(2011年)

摘要

本研究主要動機是擴展同步輻射硬X光在材料製程上的應用，經由我們一有序的研究結果可知藉由同步輻射硬X光，可建立一新綠色、簡易及快速生產合成的製程技術。我們藉由此法成功合成出聚甲基丙烯酸甲酯高分子球及金/聚甲基丙烯酸甲酯、聚甲基丙烯酸甲酯/奈米碳管、金/聚甲基丙烯酸甲酯/奈米碳管以及聚甲基丙烯酸甲酯/鐵奈米線等混成材料。在此將其分為三部分針對合成、結構及相關特性作探討。
研究證明利用同步輻射硬X光的自由基聚合反應法，在無添加起始劑下可成功合成出聚甲基丙烯酸甲酯，且更進一步以不同金前驅物母液與甲基丙烯酸甲酯單體母液的比例，製作出金奈米粒子原位合成在聚甲基丙烯酸球上以及聚甲基丙烯酸甲酯包覆金奈米粒子兩種結構材料。再者，我們經由硬X光的導入合成出的聚甲基丙烯酸甲酯/奈米碳管及金/聚甲基丙烯酸甲酯/奈米碳管混成材料，其結構與特性會因不同酸洗改質後的高比表面積之多璧奈米碳管而有不同呈現。此外，在外加磁場與同步輻射硬X光下我們成功合成出聚甲基丙烯酸甲酯/鐵奈米線之混成材料。本研究中除了聚甲基丙烯酸甲酯為多年來一直研究的生物材料外，奈米金、碳管及磁性材料亦是近年來吸引許多生醫領域之研究人員所注目的先進材料。本研究將此三種無機材料作為與高分子聚甲基丙烯酸甲酯結合的元素來製作混成材料，進而開發出新型態聚甲基丙烯酸甲酯複合材料，並且探討此一系列聚甲基丙烯酸甲酯混成材料系統內，因其不同元素的結合其結構、形貌及相關物理化學性質的變化。未來期望可透過生物或醫療功能的結合，可廣泛應用於醫療領域上。

關鍵字

聚甲基丙烯酸甲酯 ； 混成材料 ； 奈米金 ； 奈米碳管 ； 鐵奈米線 ； X光輻照 ； X光吸收光譜

並列摘要

Recently, most of researches on hard X-ray focus on its microscopy. In order to ex¬pand its applications, we investigate materials fabrication via synchrotron radiation hard X-ray. The main motivation of this research work is developing green process, simple and fast methods. This dissertation deals with the synthesis and structure characteristic of poly(methyl metharylate) (PMMA) spheres and combine it with gold nanoparticles (AuNPs), multi-walled carbon nanotubes (MWCNTs) and iron nanowires materials to prepare AuNPs/PMMA, PMMA/AuNPs, PMMA/MWCNTs, AuNPs/ PMMA/MWCNTs, PMMA/Iron nanowires successfully via a hard X-ray synchrotron radiation polymerization method. The study framework of this thesis can be divided into the follow-ing three parts to discuss the syntheses, structures and characteristics.
Utilizing hard X-ray synchrotron radiation exposure, PMMA spheres and new types of hybrid gold poly(methyl methacrylate) (PMMA) nano materials are synthesized successfully. Both PMMA spheres coated with gold nanoparticles and gold nanoparticles coated with PMMA can be synthesized using different ratios of HAuCl4 and MMA precursors, by exposing the mixtures to hard X-ray synchrotron radiation without the use of a reducing agent. Our study also reveals a one-step irradiation polymerization method by synchrotron radiation hard X-ray to accomplish fast and controllable production of gold nano-particles (AuNPs), poly(methyl methacrylate) (PMMA) and f-MWCNTs composites. The various characterization results with nitric acid treated on varies reflux reaction conditions and revealed the defect effects in all AuNPs/PMMA/MWCNTs specimens. In addition, externally applied magnetic fields have been used in this study to fabricate bamboo-like hybrid PMMA/Fe nanowires via hard X-ray synchrotron radiation
polymerization with various treatment parameters, which indicated that the magnetic and structural properties of the nanowires can be manipulated by irradiation treatment. This may lead to a novel synthesis for PMMA-based hybrid materials that can be used in biomate¬rials such as biosensors, drug delivery or high thermal efficiency hyperthermia therapy.

並列關鍵字

PMMA ； hybrid ； Nanogold ； MWCNTs ； Iron nanowires ； X-ray

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