In order to enhance the controlled-release property of starch-based polyurethane (SPU) coating, polyurethane/montmorillonite (SPU/MMT) composite coatings for controlled-release urea were prepared by in-situ polymerization with a rotating drum. The effect of MMT on morphology, structure, physico-chemical properties, especially controlled-release property of the as-prepared composite coatings were studied in detail. The results showed that MMT particles dispersed well in SPU matrix, and the obtained SPU/MMT composite coatings possessed more tough and compact morphology with less-visible holes co...
