US 9,750,829 B2 · Removal of microorganisms from fluid samples using nanofiber filtration media

Abstract

A method for removing microorganisms from liquid samples and a nanofiber containing liquid filtration medium that simultaneously exhibits high liquid permeability and high microorganism retention. Microorganisms such as bacteria, particularly B. Diminuta, are removed from a liquid by passing the liquid through a porous nanofiber containing filtration medium having a B. Diminuta LRV greater than about 9, and the nanofiber(s) has a diameter from about 10 nm to about 1,000 nm. Another method for removing microorganisms such as bacteria and Mycloplasma, includes passing the liquid through a porous nanofiber containing filtration medium having a microorganism LRV greater than about 8, and the nanofiber(s) has a diameter from about 10 nm to about 1,000 nm. The filtration medium can be in the form of a fibrous electro spun polymeric nanofiber liquid filtration medium mat.

Claims8

Dependent claims

A method of removing-bacteria from a liquid sample comprising the steps of:

a) providing a liquid sample containing bacteria,
b) providing a porous nanofiber containing filtration medium made by electrospinning a polymer, and wherein the filtration medium exhibits full retention of Brevundimonas diminuta as measured in accordance with ASTM F838-83, a porosity from about 80% to about 95%, and a liquid permeability greater than about 1000 LMH/psi, wherein the nanofiber has a fiber diameter from about 10 nm to about 1,000 nm, and
c) passing the liquid sample containing bacteria through the filtration medium resulting in the full retention of bacteria by size-based separation.

Dependencies are inferred from the claim text.

Removal of microorganisms from fluid samples using nanofiber filtration media

Life of this patent

Removal of microorganisms from fluid samples using nanofiber filtration media

Life of this patent

Abstract

Claims8