Polyurethane-Clay Nanocomposite and Microcellular Foaming

50889-98-I Polyurethane-Clay Nanocomposite and Microcellular Foaming--Industrial Science and Technology Network, Inc., 1600 Pennsylvania Ave., York, PA 17404-1754; (717) 843-0300 Dr. Yuehua Zhang, Principal Investigator Dr. Arthur Yang, Business Official DOE Grant No. DE-FG02-98ER82597 Amount: $74,954 Polymer clay composites exhibit exceptional properties when the clay molecules are removed to form a layered composite or plate. Separation can be achieved by incorporating polymer into the space between silicate layers in the clay. Gas embryos will be generated within this space to initiate foaming. This foaming would detach the plates further and lead to foam with superior properties. Plate molecules of clay will be delaminated by urethane to form a Polyurethane-Clay nanocomposite. The objective is to make a new generation of microcellular foams from the polymer-clay nanocomposite. In Phase I, urethane or urea is proposed to modify the surface of the clay molecules. A nanocomposite would be formed by the polymerization of urethane within the space of silicate plates. Homogeneous nucleation of gas produced during polymerization would lead to foaming the polymer between the layers. Commercial Applications and Other Benefits as described by the awardee: A low density foam of PU-Clay nanocomposite could potentially become a super thermal insulation. A PU-Clay super insulation might replace HCFC blown PU insulation in refrigerators. PU-Clay foams may also find applications in building materials and automobiles._