NASA Tech Needs

Delivery System for Controlled Release of Actives

A technology is sought that will enable delivery of active cleaning compositions triggered at a specific time/place by a large range of conditions. The solution must be environmentally safe, must function at a pH range between seven and 11 and temperatures between 5 and 80°C, be compatible for use with chemicals in liquid or solid form, and be suitable for use in a mass-market consumer product. It must not inhibit homogenous mixing of the active material into solutions or onto substrates after dispensing.

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Natural Preservatives for Beverages

Organic antimicrobial chemistries are needed to act as natural preservatives for a variety of beverages. They must be safe, stable, colorless, odorless, and tasteless at the concentration necessary to act as a preservative, and be effective at low concentrations (below 1%). They must extend the overall lifetime of the beverage and the nature of the beverage must not change.

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Thin-Film Solar Cell Technologies

Thin-film technologies are sought for dye-sensitized solar cells that are flexible and printable on a plastic substrate; amorphous silicon/microcrystalline silicon tandem solar cells and textured TCO glass; and copper-indium- gallium-selenide solar cells that are flexible and printable on a plastic or stainless steel substrate. Also needed is a quasi-solid-state electrolyte (for outdoor reliability and stability) and a sintering technology to deposit TiO2 paste on flexible substrates at temperatures under 150°C.

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