以聚麩胺酸鹽製備奈米金及其對聚胜肽結構之影響研究

The study of gold nanoparticles prepared by poly-glutamic acid salts and their effects on the structure of the poly-peptide

陳景弘(Jin Hong Chen)

指導教授 ： 張朝欽

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2007年)

https://doi.org/10.6846/TKU.2007.00615

摘要

本研究著重於以聚胜肽高分子製備高分子-奈米金奈米複合材料的方法。研究中以化學還原法，成功在水相中用聚麩胺酸鹽直接還原金鹽並穩定所製備之奈米金顆粒，製備高濃度的奈米金水溶液。研究中證實聚麩胺酸鹽兼具還原劑與保護劑的效果，其分子量的大小會影響顆粒的大小。
　　藉由以FTIR與NMR檢測分析聚麩胺酸鹽在製備奈米金的過程中，反應前後其結構不變。藉由TEM觀察奈米金粒子的粒徑得知為30nm、20nm、10nm、30nm分別為以高、中、低分子量的聚麩胺酸鈉鹽及聚麩胺酸鈣鹽所還原出來的奈米金顆粒。另外，將複合材料進行TGA與DSC等熱分析測試，以測得材料的熱裂解溫度(380℃)等熱性質。
　　含奈米金樣品的紫外光可見光吸收光譜的最大吸收位置則位於 520~540 nm 之間。另外，聚麩胺酸鹽高分子在還原金鹽製備奈米金之後，其裂解溫度不變。

關鍵字

奈米金 ； 聚麩胺酸 ； 聚胜肽結構

並列摘要

The present work focuses on the synthesis method which use poly-peptide polymer to prepare the nano-gold nanocomposites. HAuCl4 was reduced and stabilized by poly-peptide polymer directly. Besides, we prepared the dense solution of nano-gold under aqueous phase successfully. This study also confirms that poly-glutamic acid salt plays the role of reducing and protecting agent. Therefore, the molecular weight of poly-glutamic acid salt will affect the particle size distribution.
Moreover, we used the FTIR and NMR to investigate and analyze the process of preparing nano-gold particles by poly-glutamic acid salt. During the whole process, the structure of poly-peptide is invariant.
The nano-gold particle size distribution were 30, 20, and 10 nm which were prepared by the high, middle, and low molecular weight of poly-glutamic acid sodium salt and poly-glutamic acid calcium salt from TEM observation, respectively. Furthermore, TGA and DSC were used to measure the degradation temperature (380℃) and the thermal property of the material.
The maximum of absorbance wavelength (λmax ) of the prepared nanocomposites were located at 520~540nm by UV-Vis measurement. On the other hand, the thermal properties of nano-gold particles which reduced by poly-glutamic acid salts doesn’t change.

並列關鍵字

gold nanoparticle ； poly-glutamic acid ； the structure of the poly-peptide

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