製備多熱點聚醯胺酸／氧化鋅核殼顆粒 探討表面增強拉曼散射性質

Preparation Multi-Hotspot of Poly(Amic Acid) / Zinc Oxide Core-Shell Particles and Investigation Surface-Enhanced Raman Scattering

李冠霆(Guan-Ting Li)

指導教授 ： 許克瀛

中原大學/工學院/化學工程研究所/碩士(2015年)

https://doi.org/10.6840/cycu201500055

摘要

本研究以苯四甲酸二酐(Pyromellitic dianhydride, PMDA)及4,4'-二氨基二苯醚(4,4’-Oxydianiline, ODA)兩單體，利用沉澱聚合法製備出聚醯胺酸（poly（amic acid），PAA）顆粒。以醋酸鋅為前驅物，醇類為溶劑，利用溶膠凝膠法，製備氧化鋅（Zinc Oxide, ZnO）奈米顆粒。再將前述兩產物利用非勻相團聚法，在室溫下合成PAA／ZnO，有機／無機核殼顆粒。
於實驗過程中，改變單體固含量、溶劑、反應時間等條件，探討其對製備顆粒粒徑大小、表面形態的影響，並找出最適條件。利用XRD及FTIR可判斷是否成功製備出聚醯胺酸／氧化鋅核殼顆粒。
PAA／ZnO，有機／無機核殼顆粒應用於表面增強拉曼散射。以此核殼顆粒為基材，將不同體積濃度的Rhodamine 6G（Rh 6G）染料滴在核殼顆粒上，使染料訊號可以放大數萬倍，且訊號增強的強度與染料濃度成正比關係。

關鍵字

核殼顆粒 ； 溶膠凝膠 ； 氧化鋅 ； 表面增強拉曼散射

並列摘要

Poly(amic acid) particles were prepared by using precipitation polymerization, Pyromellitic dianhydride(PMDA) and 4,4’-Oxydianiline(ODA) as its monomers. Zinc oxide were prepared by sol-gel route using as a precursor, alcohol as a solvent. Under room temperature, Poly (amic acid)/zinc oxide core-shell composite particles were obtained via heterocoagulation method by reacting these two above products.
The reaction conditions were changed, such as changing the solid content of monomer, medium and reaction time , the effects on the sizes of the particles and surface morphology were investigated. From the above experiments, the optimal conditions were chosen.
SEM and TEM were used to observed the shape, size and homogeneity of the particles. Through XRD and FTIR, the successful of Poly (amic acid)/zinc oxide core-shell composite particles could be determined. Various amount of dye(rhodamine 6G) dropped on the prepared composite particles, the signal of Rh6G by Raman instrument was enhanced. Enhanced signal amplitude is proportional to the concentration of the dye.

並列關鍵字

Surface-Enhanced Raman Scattering ； Zinc oxide ； sol-gel ； core-shell particles

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