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Physicochemical characterization and formation of glyphosate-laden nano-emulsion for herbicide formulation


Lim, Chaw Jiang and Basri, Mahiran and Omar, Dzolkhifli and Abdul Rahman, Mohd Basyaruddin and Salleh, Abu Bakar and Raja Abdul Rahman, Raja Noor Zaliha (2012) Physicochemical characterization and formation of glyphosate-laden nano-emulsion for herbicide formulation. Industrial Crops and Products, 36 (1). pp. 607-613. ISSN 0926-6690; ESSN: 1872-633X


A nano-emulsion system was developed for pesticide formulation. Pseudoternary phase diagrams were constructed consisting emulsion system of long-chain fatty acid methyl esters (LFAMEs)/mixed surfactant/water and a quarternary component, glyphosate isopropylamine (IPA) as a herbicide active. Isotropic (L) regions were formed in the phase diagrams using mixed surfactant long-chain alkylpolyglucosides (LAPG) and ethoxylated -(3-hydroxypropyl)-heptamethyltrisiloxane (organosilicone) at the ratios of 9:1, 8:2 and 7:3. Pre-formulation concentrates were chosen from the L regions with less than 20% (w/w) of inerts (LFAMEs + mixed surfactant) and were characterized with regard to particle size, particle aging rate and thermostability study. A pre-formulation concentrate with the lowest aging rate and stable at high temperature (54 °C) was selected for the mechanisms study of the pre-formulation concentrate in conjunction with the development of nano-emulsion formulation. The transmission electron microscopy (TEM) result showed that the pre-formulation concentrate appeared as a polymerized multi-connected network. Upon water dilution of the pre-formulation concentrate with gentle stirring (low-energy emulsification method), well-dispersed nanoparticles were formed with no needle structure being observed. The nano-emulsion particles were incorporated well with the glyphosate IPA thus inferring that this nano-emulsion system could ameliorate the bioactivity and bioavailability of the herbicide.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Agriculture
Faculty of Biotechnology and Biomolecular Sciences
Faculty of Science
Institute of Bioscience
DOI Number: https://doi.org/10.1016/j.indcrop.2011.11.005
Publisher: Elsevier
Keywords: Nano-emulsion; Glyphosate isopropylamine; Alkylpolyglucosides; Pesticide formulations; Low-energy emulsification
Depositing User: Najwani Amir Sariffudin
Date Deposited: 11 Nov 2014 06:12
Last Modified: 28 Sep 2016 02:21
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.indcrop.2011.11.005
URI: http://psasir.upm.edu.my/id/eprint/22315
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