Advances in Controlled Release Fertilizers: Cost‐Effective Coating Techniques and Smart Stimuli‐Responsive Hydrogels

Controlled - Release Fertilizers : Advances and Challenges

Controlledrelease fertilizers (CRFs) offer an excellent option to improve nutrients uptake by plants and reduce the environmental hazards due to excess release of chemicals. Polymer-coated fertilizers, compared to the other types of CRF, are by far the most intensively researched topic because of their great characteristics. Polymercoated fertilizers, which are less sensitive to the soil and en...

Advances in Research and Applications of Smart Hydrogels Part I: Preparation Methods and Classification

Polyurethane from Liquefied Wheat Straw as Coating Material for Controlled Release Fertilizers

A new controlled release fertilizer was developed by coating urea particles with bio-based polyurethane. Coating materials were synthesized from liquefied wheat straw, isocyanate, and castor oil. The effects of liquefied solvents, mass ratio of liquid to solid, size of wheat straw, and reaction time during liquefaction process on the nitrogen release rate of polyurethane-coated urea (PCU) were ...

Controlled Release Drug Delivery from Hydrogels

The objective of this project is to introduce students to the concepts of diffusion, polymers and polymerization reactions, and enzyme mediated reactions by designing and testing a controlled release drug delivery system. These types of systems are also referred to as localized drug delivery because an implant that releases drugs is placed directly into diseased tissue. Here, we use Jell-O c ©a...

Novel High Capacity Swelling Superabsorbent Composite and Its Potential for Controlled Release of Fertilizers

A hydrophilic macromolecular network is prepared by performing graft copolymerization of poly (sodium acrylate) chains onto salep and silica gel. The reaction parameters affecting the water absorbency of the superabsorbent composite were optimized using Taguchi method. FT-IR spectroscopy and Thermo Gravimetric Analysis (TGA) were used for confirming the s...