首页 | 本学科首页   官方微博 | 高级检索  
     


Water Uptake Kinetics and Control Release of Agrochemical Fertilizers from Nanoclay-Assisted Semi-interpenetrating Sodium Acrylate-Based Hydrogel
Authors:Sayan Ganguly
Affiliation:Rubber Technology Centre, Indian Institute of Technology, Kharagpur, India
Abstract:Semi-interpenetrating composite hydrogels composed of poly(acrylic acid-co-sodium acrylate)/polyethylene glycol for the controlled release of fertilizers were synthesized by using nano-phyllosilicate. Hydrogel was characterized by infrared spectral analysis (Fourier transform infrared), X-ray diffraction, and scanning electron microscopy. The cross-link density (ρc), average molecular weight between cross-links (Mc), and the mesh size of the network (?) were also determined. The degree of neutralization of acrylic acid component has a positive impact in the swelling behavior of hydrogel, which was investigated through its swelling study and pH-oscillatory behavior. The dependency of synthesis parameters, pH and ionic strength on swelling characteristics were investigated. The type of the diffusion phenomena was investigated by calculating various kinetic parameters such as the diffusion coefficient, diffusion rate constant, swelling exponents, etc. The swelling ratio with varying synthetic parameters was recorded to investigate fourth-order factorial model. The model gives the idea of the effect of the independent parameters on the swelling ratio.
Keywords:Controlled release of fertilizer  montmorillonite clay  poly(acrylic acid-co-sodium acrylate)  regression model  semi-interpenetrating hydrogels
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号