Controlled release formulations of carbaryl based on copper alginate, barium alginate, and alginic acid beads
Yükleniyor...
Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
John Wiley & Sons Inc
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
A controlled release system for reducing environmental impact was produced by encapsulating the pesticide carbaryl (Carb) in the alginate beads. The various bead formulations were prepared by using sodium alginate (NaAlg) as a polymer, CUCl2, BaCl2 as a crosslinking agent, and HCl as a linking agent. The surface morphology of prepared beads was characterized with scanning electron microscopy (SEM). SEM confirmed the spherical nature and surface morphology of the particles. Bead characteristics, such as Carb entrapment efficiency, particle size, swelling degree, and Carb release kinetics, were determined. The effects of crosslinker or linker concentration, type, and carbaryl/sodium alginate (Carb/NaAlg) ratio on Carb release from the beads were investigated for 20 days at 25 C. It was observed that Carb release from the beads increased with the increase of Carb/NaAlg ratio whereas decreased with the increase of crosslinker concentration. At the end of 20 days, the Carb release from alginic acid beads was found to be higher than that of copper alginate (Cu-Alg) and barium alginate (Ba-Alg) beads. The swelling measurements of the beads supported the release results. Release kinetics were described by Fickian and non-Fickian approaches. (c) 2006 Wiley Periodicals, Inc.
Açıklama
Anahtar Kelimeler
water soluble polymers, controlled release, carbaryl, insecticide, beads
Kaynak
Journal Of Applied Polymer Science
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
102
Sayı
5
Künye
closedAccess
