Nanozeolite platforms for health-related applications

B. Wang
ZeoVation, Inc., United States

Keywords: Antimicrobial, sunprotection agents, nanozeolites

Zeolites are crystalline aluminosilicates with a very well defined and regular 0.7 nm pore structure. The framework is negatively charged, with charge-balancing cations. These cations can be ion-exchanged with other ions. As synthesized, the pore structure of the zeolite is filled with water, which can be removed for hosting molecules with the right size and shape. We have taken advantage of the ion-exchange and introducing molecules in the intrazeolitic space to create two consumer products, antimicrobial and sunscreens. These products stemmed from our recent discovery of a process for rapid synthesis of nanozeolites. For the antimicrobial, we ion-exchange silver ion into the nanozeolite. The zeolite acts like sponge and soaks up large quantities of silver ion. Because of the nano size, the product can be formulated readily into sprays, gels, coatings, textiles. Results indicates high antimicrobial potency. For molecule encapsulation, we have chosen avobenzone, the most commonly used UVA absorber in sunscreen formulations. By encapsulating avobenzone into the cages of the zeolite, we increase its photostability, avoid contact with skin and transdermal absorption (of considerable concern to the FDA) and provide extended coverage into the high energy visible region. The nanozeolite also exhibit SPF boosting effect from light scattering.