Natural nanotubes enhance biodegradable and biocompatible nanocomposites; Nanotubes in halloysite clay may provide increased strength and new capabilities for consumer product, packaging, medical, and other applications

Author: Cooper, Sarah ; Wagner, Aaron L. ; Riedlinger, Michael

A review.Nanocomposites are a rapidly expanding new plastics technol. with potential application in the fabrication of novel materials that are stronger, lighter, and producible at lower total lifecycle costs than existing plastic materials.An increasingly important issue with nanocomposites is the impact on the environment, which is unclear.Natural nanotubes can address this environmental issue owing to their capability to enhance biodegradable and biocompatible nanocomposites.Naturally occurring inorganic nanotubes are found in halloysite clay, a layered aluminosilicate chem. similar to kaolin.Halloysite nanotubes, as performance additives in polylactide formulations, offer the potential performance advantages of improved impact strength, increased thermal resistance, and simplified dispersion.NaturalNano has been working with both academic and government research laboratories for applications of halloysite nanotubes in several types of polymers, including PLAs.Preliminary results of studies utilizing halloysite nanotubes for forming a PLA nanocomposite are encouraging and indicate that the material can offer improved performance attributes.

Halloysite nanotubes in polymers

Author: Duffy, Michael ; Daly, Robert C. ; Fleischer, Cathy A. ; Wagner, Aaron L.

Halloysite Nanotubes (HNT) provide a new avenue for the preparation of nanocomposites.Halloysite is a naturally occurring member of the kaolin family of aluminosilicate clays.Its uniqueness is that it exists predominantly in a tubular form with lengths of up to 10 μ and diameters of up to 400 run rather than the deck of cards platy form of essentially all other clays.Well behaved dispersions of HNT in nylon-6, polypropylene, TPO and several varieties of PE have been obtained by standard melt processes.In all cases, improved phys. performance has been realized for molded parts.HNT have also been dispersed in polymer latexes and dispersions at quite high loadings.These polymer and clay dispersions have been coated and produce coatings with useful performance properties.

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