Controlled nutrient release for more efficient agricultural water use and reduced environmental insult

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We will create a completely new type of coating for fertilizer granules. Clays that adsorb and slowly release phosphates and/or other nutrients will be exfoliated with cationic organic reagents to produce organoclay nanoparticles of greatly increased surface area. These will be polymerized with current and novel monomers to form nanocomposites, encasing the clay in a water-swellable matrix by polymerization; this will enable both slow water perfusion and strong binding to the granules. The polymer and nanoclay properties will be tuneable to release targeted nutrients at an optimal rate for uptake by crops, reducing nutrient seepage into the environment.