靜電紡絲法製備矽基氧化物奈米中空結構

A Silicon-Based Hollow Nanostructure produced by Electrospinning process

陳俊毅(Chun-Yi Chen)

指導教授 ： 鍾卓良

義守大學/理工學院/材料科學與工程學系/碩士(2019年)

摘要

利用便宜簡單的單軸靜電紡絲，本實驗成功製備高光學穿透度和高附著力的中空奈米纖維與具疏水性結構的珊瑚狀(coralloid)奈米纖維。以四乙氧基矽烷(TEOS)作為矽源，加入硝酸釔、硝酸鈣，以聚乙烯吡咯烷酮（Polyvinylpyrrolidone，PVP）進行混摻，使用酒精及 DMF 作為溶劑，配置成溶液待其溶解完全後再進行靜電紡絲，藉由設計不同的熱處理溫度製備多型貌的中空奈米纖維。
使用 FE-SEM 觀察奈米纖維的表面形貌和纖維直徑，並使用 EDS 進行成分分析，將熱處理過後的奈米纖維進行XRD結晶繞射分析並探討其結晶構造，從中得知材料特性與結晶情形，接著利用 PL與UV-vis光譜分析並針對其光學性質之探討與研究，水滴角測試儀量測其水滴角，最後再以百格實驗分析奈米纖維在矽基板的附著力。
在750℃時獲得中空奈米纖維，擁有極高的光學穿透度，且在矽基板上的附著力為ATSM最高國際規範的最高標準5B Class，850℃到1150℃熱處理過後，透過FE-SEM觀察奈米纖維的表面發現初紡纖維與750℃前的奈米纖維表面大致呈現平整光滑，以750℃為分界，850℃以後的中空纖維逐漸崩潰形成粗糙表面與空間重疊的微小空隙，纖維也開始從細小部分開始收縮斷裂或者與相鄰纖維互相擴散結合形成粗大的纖維結構，有呈現越來越疏水的現象發生，表示在同樣表層為氧化物的情況下，結構逐漸轉化為疏水性結構。

關鍵字

靜電紡絲 ； 中空結構

並列摘要

In this study, the silicon-base net-like hollow nano- structure were prepared using single-nozzle electrospinning and heat treatment process. Firstly, a precursor solution is prepared by dissolving an appropriate amount of Polyvinyl- pyrrolidone (PVP) and Tetraethyl orthosilicate (TEOS) in ethanol and spinning the nanofibers using a single -nozzle electrospinning. Secondly, the morphology of electrospi- nning nanofibers was controlled, the temperature profile was designed to prepare hollow nanofibers, and the morphology and properties of nanofibers were explored. Molding with traditional methods, such as rapid freezing, 3D printing, and sintering. It is almost impossible to prepare fibers with diameters less than 1 μm. The electrospinning technology is simple in its production process and cab increase the hollow, high length, uniform 　　diameter, and diverse components of the nano-fiber.
Finally, The characteristic of nanofibers, following instrum- ents were used:Field Emission Scanning Electron Microscope (FE-SEM), Photoluminescence (PL), X-ray Diffract-ion(XRD).Using FE-SEM system is to explore the morphology, diameter of nanofibers, and hollow nanofiber.The electrospinning technique followed by sub-sequent heat treatment is well developed so that we can successfully prepare silicon-base oxide nanofibers with the hollow structure. Thus, the microstructure and morphology of electrostatic spinning silicon-base oxide hollow nanofib- ers were explored, and also their crystalline properties and crystal structure were identified.

並列關鍵字

Electrospinning ； hollow ； nanofibers ； PVP ； SiO2

參考文獻

[01]X. Yang, H. Tang, K. Cao, H. Song, W. Sheng, Q. Wu. “Templated-assisted one-dimensional silica nanotubes: synthesis and applications” J. Mater. Chem.,21 (2011), pp. 6122-6135.

[02]C. Bojer, J. Schobel, T. Martin, M. Ertl, H. Schmalz, J. Breu. “Clinical wastewater treatment: photochemical removal of an anionic antibiotic (ciprofloxacin) by mesostructured high aspect ratio ZnO nanotubes” Appl. Catal. B Environ., 204 (2017), pp. 561-565.

[03]R.-A. Doong, C.-Y. Liao. “Enhanced photocatalytic activity of Cu-deposited N-TiO 2/titanate nanotubes under UV and visible light irradiations” Sep. Purif. Technol., 179 (2017), pp. 403-411.

[04]C.B. Liu, X.S. Wang, F. Xie, L. Liu, S.P. Ruan. “Fabrication of Sm-doped porous In2O3 nanotubes and their excellent formaldehyde-sensing properties”J. Mater. Sci. Mater. El., 27 (2016), pp. 9870-9876.

[05]H.X. Chuo, L.L. Wu. “Facile synthesis and growth mechanism of SiO2 nanotubes with ZnS nanowires as intermediates” J. Nanosci. Nanotechnol., 16 (2016), pp. 3890-3894.