# US 7,744,818 B2 · Stationary phase materials for micro gas analyzer

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- Number: US 7,744,818 B2
- Document ID: US7744818B2
- Status: Granted
- Kind: B2
- Application number: 11/276,399
- Filed: 2006-02-27
- Published: 2006-10-12
- Granted: 2010-06-29
- Earliest claimed: 2005-02-28
- Assignees: Honeywell International Inc.
- Inventors: Nancy E. Iwamoto; Teresa A. Ramos; Robert R. Roth; Ulrich Bonne
- Web page: https://patentgrep.com/patent/US7744818B2

## CPC

- B01J 20/285: based on polymers
- B01J 20/28: characterised by their form or physical properties
- B01J 20/28007: {with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like (carbon nanostructures B01J20/205)}
- B01J 20/28095: {Shape or type of pores, voids, channels, ducts}
- B01J 20/282: Porous sorbents (ion exchange B01J39/00 - B01J41/00)
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- G01N 30/52: Physical parameters
- B01J 2220/54: Sorbents specially adapted for analytical or investigative chromatography
- G01N 30/6095: {Micromachined or nanomachined, e.g. micro- or nanosize}
- G01N 2030/525: {surface properties, e.g. porosity}
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

Selecting a stationary phase for a fluid analyzer using certain criteria to determine an appropriate material for use in, for instance, a micro fluid analyzer. High absorption of an analyte or sample, low water sorbency and high porosity or permeability of the material may be sought. A selected material may incorporate a toughening agent using a neutral leaving group. A selected material may have a capping agent to promote hydrophobicity. A selected material may be a hydrophobic polymer. The selection of a stationary phase may involve molecular modeling.

## Claims

### Claim 1

A method for making a stationary phase for a fluid analyzer, comprising:
selecting a material, and wherein selecting a material includes utilizing computer based molecular modeling and qualitatively comparing interactions from a molecular scale; and
applying the material on a support member; wherein the material comprises a hydrophobic polymer and a porous dielectric having a toughening agent that uses a neutral leaving group and has:
an adsorption energy that monotonically increases with molecular weight or boiling point; and
a potential activity to resist water interference during adsorption; and
wherein the polymer comprises: polynorbornene; polytetrafluoroethylene;
fluorinated polyolefins; and/or novolac resins.

### Claim 2 (depends on 1)

The method of claim 1, wherein the material further has:
a nonpolar property; and
a temperature tolerance greater than 200 degrees C.

### Claim 3 (depends on 1)

The method of claim 1, wherein the material comprises an organic low k dielectric.

### Claim 4 (depends on 1)

The method of claim 1, wherein the material comprises nanotubes.

### Claim 5 (depends on 1)

The method of claim 1, wherein the material is a composite comprising a low k inorganic and a low k organic mixture.