The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 19, 2019
Filed:
Aug. 09, 2017
The United States of America As Represented BY the Secretary of the Air Force, Washington, DC (US);
Jeffrey Alston, Valencia, CA (US);
Joseph Mabry, Lancaster, CA (US);
Andrew Guenthner, Lancaster, CA (US);
The United States of America as represented by the Secretary of the Air Force, Washington, DC (US);
Abstract
A method of making natural polymer (nano)particles, comprises two immiscible phases and a surface active agent, wherein one phase includes a natural polymer source and ionic liquid; stirring the combined phases with surfactant to form a microemulsion; adjusting the ratios of ionic liquid, surfactant, and immiscible phase to determine a particular size of natural polymer nanoparticles; stirring antisolvent into the emulsion; diluting the emulsion; and washing and drying precipitated polymer (nano)particles from the emulsion. The immiscible phase comprises at least one of immiscible solvent, oil, or immiscible ionic liquid. The ionic liquid phase includes natural polymer dissolved in ionic solvent. The antisolvent is water, other protic solvent or additive. The emulsion is diluted with, more immiscible phase, 1-butanol, or a mutually miscible solvent, or oil. The emulsion is diluted with an excess of the volume of the emulsion. The precipitated polymer (nano)particles are washed (sequentially) with 1-butanol and water.