Hydrophobic nanostructured thin films

Patent metadata

Field	Value
Publication number	US-9840638-B2
Application number	US-201615219907-A
Country	US
Kind code	B2
Filing date	Jul 26, 2016
Priority date	Apr 28, 2008
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

Provided herein are the polymers shown below. The value n is a positive integer. R 1 is an organic group, and each R 2 is H or a chemisorbed group, with at least one R 2 being a chemisorbed group. The polymer may be a nanostructured film. Also provided herein is a method of: converting a di-p-xylylene paracyclophane dimer to a reactive vapor of monomers; depositing the reactive vapor onto a substrate held at an angle relative to the vapor flux to form nanostructured poly(p-xylylene) film; reacting the film with an agent to form hydrogen atoms that are reactive with a precursor of a chemisorbed group, if the film does not contain the hydrogen atoms; and reacting the hydrogen atoms with the precursor. Also provided herein is a device having a nanostructured poly(p-xylylene) film on a pivotable substrate. The film has directional hydrophobic or oleophobic properties and directional adhesive properties.

First claim

What is claimed is:

1. A polymer comprising:

wherein n is a positive integer;
wherein the polymer is a nanostructured film made by:
converting a trifluoroacetyl-di-p-xylylene paracyclophane dimer to a reactive vapor of monomers, the reactive vapor having a flux; and
depositing the reactive vapor under vacuum onto a substrate held fixed in a specific angle of orientation relative to the vapor flux to form nanostructured poly(trifluoroacetyl-p-xylylene) film.

Assignees

• Us Navy

Inventors

• Dressick Walter J
• Demirel Melik C

Classifications

• C08G81/00

  Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers (involving only carbon-to-carbon unsaturated bond reactions C08F299/00 {; polyester-amides C08G69/44; polyester-imides C08G73/16; polyamides-imides C08G73/14; block- or graft polymers containing polysiloxane sequences C08G77/42}) · CPC title

• B05D5/08

  to obtain an anti-friction or anti-adhesive surface (rendering particulate materials free-flowing in general, e.g. making them hydrophobic B01J2/30) · CPC title

• B05D1/38

  with intermediate treatment (intermediate treatment per se B05D3/00) · CPC title

• B05D5/10

  to obtain an adhesive surface · CPC title

• C08G2261/3424

  non-conjugated, e.g. paracyclophanes or xylenes · CPC title