Controlled release on sand bed columns and biodegradability in soil of chitosan: Hydroxypropyl methylcellulose films

ABSTRACT The main purpose of this work is to prepare and characterize films based on chitosan (Q) and hydroxypropyl methylcellulose (HPMC) blends to achieve adequate properties to be used as coating of conventional fertilizers to prolong their availability for crops. The films loaded with KNO3 as mo...

Full description

Saved in:
Bibliographic Details
Published in:Journal of applied polymer science 2019-05, Vol.136 (20), p.n/a
Main Authors: Melaj, Mariana A., Daraio, Marta E., Vazquez, Analía
Format: Article
Language:English
Subjects:
Biodegradability
biodegradable
Chitosan
coatings
Controlled release
drug delivery systems
Durability
Fertilizers
Materials science
Mechanical properties
Polymer coatings
Polymers
Relative humidity
Sand beds
Sand casting
Soil mechanics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ABSTRACT The main purpose of this work is to prepare and characterize films based on chitosan (Q) and hydroxypropyl methylcellulose (HPMC) blends to achieve adequate properties to be used as coating of conventional fertilizers to prolong their availability for crops. The films loaded with KNO3 as model fertilizer were prepared by casting. Release of fertilizer was studied using sand bed columns. To quantify films durability in soil, their areas were measured in function of time. Results showed that chitosan substantially improved the durability of HPMC, lengthening its permanence in soil 900‰. Relative humidity had influence in mechanical properties. Comparing KNO3 powder and that loaded in the film, the time of residence in the column was much lower for the powder than the second one: 4 and 56 days, respectively. Chitosan–HPMC film would be promising as polymeric coating for controlled release fertilizers taking into account field conditions. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47532. Soil durability of Chitosan‐HPMC film ‐ Fertilizer crystals at the film surface
ISSN:0021-8995
1097-4628
DOI:10.1002/app.47532