TY - JOUR
T1 - Biodegradable Polymer‐Metal‐Organic Framework (MOF) Composites for Controlled and Sustainable Pesticide Delivery
AU - Reis, Roberta A. dos
AU - Mahmoud, Lila A. M.
AU - Ivanovska, Evdokiya H.
AU - Telford, Richard
AU - Addicoat, Matthew A.
AU - Terry, Lui R.
AU - Ting, Valeska P.
AU - Nayak, Sanjit
PY - 2023/12/1
Y1 - 2023/12/1
N2 - Due to high surface area, loading capacity, and selectivity,
Metal-Organic Frameworks (MOFs) have shown much promise recently for potential
applications in extraction and delivery of agrochemicals for environmental
remediation and sustainable release, respectively. However, application of MOFs
for pesticide delivery in wider agricultural context can be restricted by their
granular form. Herein, an alternative approach is studied using biodegradable
polymer-MOF composites to address this limitation. The loading and release of a
widely used pesticide, 2,4-dichloropheoxycetic acid (2,4-D), is studied using
two MOFs, UiO-66 and UiO-66-NH2, and the 2,4-D-loaded MOFs are
incorporated into biodegradable polycaprolactone composites for convenient
handling and minimizing runoff. The MOFs are loaded by in-situ, and
post-synthetic methods, and characterised thoroughly to ensure successful synthesis
and loading of 2,4-D. The pesticide release studies are performed on the MOFs
and composites in distilled water, and analysed using UV-Vis spectroscopy,
demonstrating sustained-release of 2,4-D over 16 days. The loaded MOF samples
show high loading capacity, with up to 45 wt% for the in-situ loaded UiO-66.
Release kinetics show more sustained release of 2,4-D from UiO-66-NH2 compared
to UiO-66, which can be due to supramolecular interactions between the NH2 group
of UiO-66-NH2 and 2,4-D. This is further supported by
computational studies.
AB - Due to high surface area, loading capacity, and selectivity,
Metal-Organic Frameworks (MOFs) have shown much promise recently for potential
applications in extraction and delivery of agrochemicals for environmental
remediation and sustainable release, respectively. However, application of MOFs
for pesticide delivery in wider agricultural context can be restricted by their
granular form. Herein, an alternative approach is studied using biodegradable
polymer-MOF composites to address this limitation. The loading and release of a
widely used pesticide, 2,4-dichloropheoxycetic acid (2,4-D), is studied using
two MOFs, UiO-66 and UiO-66-NH2, and the 2,4-D-loaded MOFs are
incorporated into biodegradable polycaprolactone composites for convenient
handling and minimizing runoff. The MOFs are loaded by in-situ, and
post-synthetic methods, and characterised thoroughly to ensure successful synthesis
and loading of 2,4-D. The pesticide release studies are performed on the MOFs
and composites in distilled water, and analysed using UV-Vis spectroscopy,
demonstrating sustained-release of 2,4-D over 16 days. The loaded MOF samples
show high loading capacity, with up to 45 wt% for the in-situ loaded UiO-66.
Release kinetics show more sustained release of 2,4-D from UiO-66-NH2 compared
to UiO-66, which can be due to supramolecular interactions between the NH2 group
of UiO-66-NH2 and 2,4-D. This is further supported by
computational studies.
U2 - 10.1002/adsu.202300269
DO - 10.1002/adsu.202300269
M3 - Article (Academic Journal)
SN - 2366-7486
VL - 7
JO - Advanced Sustainable Systems
JF - Advanced Sustainable Systems
IS - 12
M1 - 2300269
ER -