開發聚脲塗層應用在醋酸纖維素膜對羅丹明6G染料的螢光強度提升

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研究生：	邱廷瑋 Ting-Wei Chiu
論文名稱：	開發聚脲塗層應用在醋酸纖維素膜對羅丹明6G染料的螢光強度提升 Development of polyurea coating on cellulose acetate membrane to enhance the fluorescent intensity of rhodamine 6G dye
指導教授：	李篤中 Duu-Jong Lee
口試委員:	鄭智嘉 Chih-Chia Cheng Christopher George Whiteley Christopher George Whiteley
學位類別：	碩士 Master
系所名稱：	工程學院 - 化學工程系 Department of Chemical Engineering
論文出版年：	2016
畢業學年度：	104
語文別：	英文
論文頁數：	85
中文關鍵詞：	超分子過濾膜、複合氫鍵、螢光強度、羅丹明6G
外文關鍵詞：	supramolecularsmembrane, multipleshydrogensbonds, fluorescentsintensity, srhodamine 6G
相關次數：	點閱：353 下載：0
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薄膜分離程序在現今被廣泛運用在許多化學、環境處理、生物技術等技術及研發處理上面。而這些程序在能源上的節省是很重要的一環，本實驗利用一項簡單、省能源又不涉及相變化的物理操作來達到此目的。有別於常見的薄膜過濾，本實驗著重在超分子過濾的研究上面，運用含氮鹼基超分子獨特的非共價鍵的氫鍵鍵結系統，製作出組裝、拆解可輕易調控的層狀組織結構。實驗設計了一種新型的超分子合成，稱作 UrCy-PU,是利用胞嘧啶此類的含氮鹼基在合成上形成聚脲結構，彼此靠著分子間氫鍵作用力建構出一個超分子網絡結構，藉由此網絡的孔洞來達到過濾物質的特性。
本實驗分成了兩部分，第一部分為研究新型合成的超分子其基本材料性質，第二部分為利用 R6G 螢光粉來測試經過 PU 層過濾後的螢光效應。實驗結果顯示，經過此 PU 層的 R6G 溶液在固態狀態下，螢光光譜強度有所提升，然而 PU 與 R6G 的作用機制需要更深入了解，希望本實驗可以使後續的研究有另一個嶄新的研究思維與方向。

Membrane filtration processes are currently used in a wide range of applications in chemical, environmental and biological industries. Energy savings can be achieved by utilizing physical operations that do not change phase characteristics, in this study.Unlike common practices, this study does not focus on the filtration membrane but a supramolecular polymer based on non-covalent interactions. The goal of the
study is to develop a novel filtration system. Non-covalent systems are based on complementary nucleobase-pair interactions which can regulate the assembly/disassembly process and control hierarchical organization structures.
The experiment focused on exploring a new synthetic, UrCy-PU, which uses cytosine nucleobase-pair interactions as the basic core of supramolecular materials.To form a three-dimensional material constructed using various supramolecular polymer networks (SPNs) that may enable the creation of different types of secondary structures to achieve the required performance within filtration materials.The strength of the hydrogen bonds can be easily tuned by altering the donor (D) and acceptor (A) sites to obtain the desired functional structures without using covalent polymerization.
This study found a situation by pass through membrane to enhance the PL intensity to achieve the effect of increasing brightness of R6G. However, need to explore the mechanism of intensity change to understand the mechanism of PU and the fluorescent material in the process. This will serve as an area of exploration in future studies.

Acknowledgements.............................................. I
Abstract .................................................... II
摘要......................................................... III
Table of contents ........................................... IV
List of figures............................................... VI
List of tables ............................................. VIII
Chapter1. Introduction ....................................... 1
Chapter2. Literature review .................................. 5
1 Nucleobase ............................................... 5
2 Supramolecular polymer ................................... 7
3 Fluorescent material use in white light emitting diodes and application ............................................................. 12
4 Rhodamine ............................................... 14
5 Fluorescent ............................................. 18
Chapter3. Experiment materials and the methods .............. 22
1 Synthetic supramolecular material ....................... 22
2 Syntheses ............................................... 23
3 Analysis equipment for supramolecule .................... 26
4 Produce the coating layer................................ 33
5 Filtrate the R6G standard solution on membrane coating layer ............................................................. 34
6 Prepare the R6G tiny powder on solid slide .............. 35
7 Analyze the R6G solution on glass ....................... 36
8 Supplementary test ...................................... 38
8.2.1 The time effect of R6G .............................. 38
8.2.2 Zeta-potential Analyzer (zeta potential) ............ 38
8.2.3 Mixed analysis (R6G/PU) ............................. 39
Chapter4. Results and Discussion ............................ 40
1 UrCy-PU analysis ........................................ 40
2 PU coating test (thickness test) ........................ 56
3 R6G Analysis ............................................ 57
3.1.1 liquid analysis ..................................... 57
3.1.2 Membrane filtration analysis ........................ 59
3.1.3. PU coating layer on CA membrane .................... 60
3.1.4 UV attenuation coefficient .......................... 61
3.1.5 Relative Fluorescence quantum yield (QY) .............62
3.1.6 Summary for liquid analysis ......................... 64
3.2.1 PL analysis for solid thin film surface ............. 65
3.3.1 R6G unfiltrate ...................................... 67
3.3.2 R6G pass through CA membrane ........................ 69
3.3.3 R6G pass through PTFE filter......................... 70
3.3.4 R6G Pass through PU/CA membrane ..................... 71
3.3.5 Summary for SEM& DLS ................................ 74
3.4.1 The time effect of R6G .............................. 75
3.4.2 Zeta potential analysis ............................. 77
3.4.3 FTIR for R6G/ UrCy-PU mixed ......................... 79
Chapter5. Conclusions and Future Prospects .................. 81
References and notes......................................... 83

                                

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