Year: 2011
Type: book-chapter
Abstract: Water-based pesticide microemulsions have become one of the most potential pesticide formulation instead of the conventional pesticide formulation in recent years, which indeed have been a good insecticidal performance and a minimal impact on the environment. But the commonly organic solvents and cosurfactants such as toluene, xylene and methanol were widely applied in the procession of preparing the formulation. They are detrimental to environment and health of human beings all the same (Knowles., 2008). Therefore, controversy over the nocuous additives added excessively, really did put the production and application of pesticide microemulsion into trouble. But the traditional pesticide formulation can’t be compared with the pesticide microemulsion based on excellent properties of microemulsion in some respects. We should prohibit the addition of toxic substances into microemulsion, rather than forbid the pesticide microemulsion formulation itself. The development of pesticide microemulsions need providing more equitable space and rational platform. The formulation of pesticide microemulsion is an inexact science and eludes prediction for the most part, and largely dependent upon specific and incompletely understood interaction between the molecules of oil, emulsifiers, and water. So that, studies of pesticide microemulsions are limited to the combination of various components(Pratap, A. P.& Bhowmick, D. N.,2008; Narayanan, K. S., 1994; Narayanan, K. S., 1994; Jon, D. I. et al,1999). A considerable number of studies are processes of trial and error, similar to the proverbial “needle in a haystack”. Very few works have studied the methodology of pesticide microemulsion preparation (Skelton, P. R. et al, 1988; Hiromoto, B., 2007). Therefore, investigations on the formula design of pesticide microemulsions are worthwhile for more detailed theoretical and technological studies. In this paper, we reported our methods based on the pseudo-ternary phase diagram and orthogonal design. Although, the pseudo-ternary phase method has been employed to preparation of microemulsion, the combination method of the pseudo-ternary phase diagram and the orthogonal design has rarely been reported. The nearly non-toxic solvent and cosurfactants were employed to prepare pesticide microemulsion, and the optimization formulation of green environmentally friendly chlorpyrifos microemulsion was achieved. The experimental results were expected to provide new ideas and technical methods for the development of microemulsion.
Source: InTech eBooks
DOI: 10.5772/13641
Authors: Feng Zhao, Wu Yaqi
Institution: Jiangxi Science and Technology Normal University
Language: English
Subfield: Physical and Theoretical Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W1591196566