Publication Cover
Spectroscopy Letters
An International Journal for Rapid Communication
Volume 48, 2015 - Issue 4
158
Views
11
CrossRef citations to date
0
Altmetric
Original Articles

Fourier Transform Infrared Spectroscopic Study of Pesticide Microcapsules Influenced by Formaldehyde to Urea Ratio

, &
Pages 259-264 | Received 25 Sep 2013, Accepted 09 Dec 2013, Published online: 21 Nov 2014
 

Abstract

Urea–formaldehyde resin is widely used as shell materials for microencapsulation of pesticide by in situ polymerization. A series of acetochlor microcapsules were prepared with different formaldehyde to urea molar ratios in this research. Fourier transform infrared spectroscopic analysis suggests that there hardly exists any chemical interactions between shell materials and the acetochlor core materials, and the structure of urea–formaldehyde pre-polymers and shell materials are significantly different when the ratios of formaldehyde to urea increases. The pre-polymer becomes more hydroxymethylated with higher molar ratios, and hydrogen bonds in shell materials interact stronger as well, thus the ratios of formaldehyde to urea affect encapsulation efficiency by hydrogen bonding interactions, which determines the cross-link degree of the shell materials of the prepared microcapsules.

Notes

Color versions of one or more of the figures in the article can be found online at www.tandfonline.com/lstl.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 61.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 745.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.