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Photoluminescence Control of Cellulose via Surface Functionalization Using Oxidative Polymerization
Thien An Phung Hai1, Ryuichi Sugimoto1
1School of Environmental Science and Engineering, Kochi University of Technology , Miyanokuchi, Tosayamada, Kami, Kochi 782-8502, Japan.
Biomacromolecules
|September 29, 2017
Summary
Researchers modified cellulose
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Cellulose's photoluminescence properties are crucial for advanced applications.
- Grafting conducting polymers onto cellulose can enhance its optical and thermal characteristics.
Purpose of the Study:
- To investigate the effect of fluorene (F) and 3-hexylthiophene (3HT) copolymer grafting on cellulose's photoluminescence.
- To understand how varying the 3HT:F ratio influences cellulose properties.
- To provide mechanistic insights into the grafting process.
Main Methods:
- FeCl3 oxidative polymerization to graft 3HT and F copolymers onto cellulose.
- Characterization using UV-vis absorption, fluorescence spectroscopy, FT-IR, XRD, TG, and TEM-EDX.
- Absolute quantum yield measurements.
Main Results:
- Grafting induced a blue shift in UV-vis absorption peaks, dependent on fluorene content.
- Photoluminescence peak position varied with the initial 3HT:F ratio.
- Slight decrease in cellulose crystallinity and thermal stability observed.
- Quantum yield increased from 3.1% to 9.7% with higher fluorene content.
Conclusions:
- Controlling photoluminescence of cellulose is achievable by grafting 3HT:F copolymers.
- Fluorene content and 3HT:F ratio are key factors in tuning cellulose properties.
- The study offers a method to enhance cellulose's photoluminescence quantum yield.
