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Bio-Based Polyurethane Composites with Adjustable Fluorescence and Ultraviolet Shielding for Anti-Counterfeiting and
Mengyao Zhai1, Tao Shou1, Dexian Yin1
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
ACS Applied Materials & Interfaces
|November 1, 2024
Summary
This study introduces a sustainable, 100% biobased thermoplastic polyurethane (Bio-TPU) using plant-derived materials. The novel Bio-TPU/tannic acid composites exhibit tunable fluorescence and superior UV-shielding, offering eco-friendly solutions for advanced materials.
Area of Science:
- Materials Science
- Polymer Chemistry
- Sustainable Chemistry
Background:
- Petroleum-derived polyurethanes are widely used but unsustainable.
- There is a growing need for eco-friendly alternatives in packaging and material applications.
- Innovative materials are required for anticounterfeiting and UV protection.
Purpose of the Study:
- To synthesize a 100% biobased thermoplastic polyurethane (Bio-TPU).
- To develop novel biobased composites using tannic acid (TA) for enhanced properties.
- To evaluate the fluorescence and UV-shielding capabilities of the developed Bio-TPU/TA composites.
Main Methods:
- Synthesis of Bio-TPU from biobased poly(trimethylene ether) glycol, pentamethylene diisocyanate, and 1,4-butanediol.
- Preparation of Bio-TPU/TA composites by incorporating biobased tannic acid.
- Systematic evaluation of the structural and property characteristics of the Bio-TPU and its composites.
Main Results:
- Bio-TPU/TA composite films demonstrated excellent and controllable fluorescence properties.
- Tunable fluorescence colors (blue, green, yellow) were achieved by adjusting TA content and using coupling agents.
- UV transmittance significantly decreased from 79.25% to 5.43% below 400 nm with increasing TA content, showing superior UV-barrier performance.
Conclusions:
- Biobased TPU/TA composite films are promising for anticounterfeiting applications.
- These composites offer effective UV-shielding protection, suitable for various high-end industries.
- The study promotes sustainable development in the polyurethane sector and expands its application scope.
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