Multifunctional PCL/Lignin-PCL Composite Films for Delivery of Atrazine and Metribuzin for Sustainable Agriculture Applications
Alvaro G. Garcia, Omar E. Mendez, Fannyuy V. Kewir, Gabriel D. Patterson, Artur Klamczynksi, Onu Onu Olughu, Carlos E. Astete, James D. McManus, Cristina M. Sabliov
TL;DR
This study develops eco-friendly composite films that can control the release of agricultural chemicals while offering UV protection and biodegradability.
Contribution
The novel use of lignin-grafted PCL in composite films for controlled pesticide release and UV protection is introduced.
Findings
LN-PCL films showed enhanced mechanical properties and UV light absorption.
Controlled release of atrazine (<16%) and metribuzin (46%) was achieved over 10 weeks.
LN-PCL films degraded within 30 days and exhibited improved surface properties.
Abstract
Sustainable agriculture calls for the development of eco-friendly materials that possess desired properties and functionalities. In this study, the effect of incorporating lignin-grafted poly(ε-caprolactone) (LN-PCL) into a PCL matrix was evaluated. LN-PCL was synthesized by ring-opening polymerization (ROP), yielding polymers with varying PCL degrees of polymerization (DP 26–101) and amphiphilic properties. Incorporating LN-PCL into PCL films enhanced hydrogen bonding, crystallinity, and doubled Young’s modulus. SEM analysis showed smoother surfaces with higher DPs, while lower DPs reduced the contact angle from 78° to 68°. LN-PCL films absorbed >98% UVAB and >94% UVC light regardless of DP and degraded within 30 days. Release studies indicated controlled release rates of ATZ (<16%) and MTZ (46%) over 10 weeks. Overall, the UV protection, surface, mechanical, and controlled release…
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Taxonomy
TopicsPolymer-Based Agricultural Enhancements · Pesticide and Herbicide Environmental Studies · Enzyme-mediated dye degradation