Title: Surface modification of polymer foams using plasma

Abstract

An embodiment includes a system comprising: a monolithic shape memory polymer (SMP) foam having first and second states; wherein the SMP foam includes: (a) polyurethane, (b) an inner half portion having inner reticulated cells defined by inner struts, (c) an outer half portion, having outer reticulated cells defined by outer struts, surrounding the inner portion in a plane that provides a cross-section of the SMP foam, (d) hydroxyl groups chemically bound to outer surfaces of both the inner and outer struts. Other embodiments are discussed herein.

Inventors:

Nash, Landon D.; Maitland, Duncan J.; Docherty, Nicole; Wilson, Thomas S.; Small, IV, Ward; Ortega, Jason; Singhal, Pooja

Issue Date:

2022-10-04

Research Org.:

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Texas A&M Univ., College Station, TX (United States)

Sponsoring Org.:

USDOE; National Institutes of Health (NIH)

OSTI Identifier:

1986644

Patent Number(s):

11459439

Application Number:

16/984,370

Assignee:

Lawrence Livermore National Security, LLC (Livermore, CA); The Texas A&M University System (College Station, TX)

Patent Classifications (CPCs):

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL

B - PERFORMING OPERATIONS B05 - SPRAYING OR ATOMISING IN GENERAL B05D - PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL

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A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61L - METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL

A61L24/0036 - {Porous materials, e.g. foams or sponges}
A61L24/046 - {obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
A61L2400/16 - Materials with shape-memory or superelastic properties
A61L2430/36 - for embolization or occlusion, e.g. vaso-occlusive compositions or devices
A61L31/06 - obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds {
A61L31/14 - Materials characterised by their function or physical properties {, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials}
A61L31/146 - {Porous materials, e.g. foams or sponges}

B - PERFORMING OPERATIONS B05 - SPRAYING OR ATOMISING IN GENERAL B05D - PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL

B05D1/62 - {Plasma-deposition of organic layers
B05D3/144 - {of polymeric substrates}
B05D7/02 - to macromolecular substances, e.g. rubber

B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29C - SHAPING OR JOINING OF PLASTICS

B29C44/5663 - {by perforating the foam, e.g. to open the cells}
B29C59/14 - by plasma treatment {

B - PERFORMING OPERATIONS B29 - WORKING OF PLASTICS B29K - INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

B29K2033/04 - Polymers of esters
B29K2069/00 - Use of PC, i.e. polycarbonates {or derivatives thereof}, as moulding material
B29K2075/00 - Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material
B29K2077/00 - Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material
B29K2995/0093 - hydrophobic

B - PERFORMING OPERATIONS B32 - LAYERED PRODUCTS B32B - LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

B32B27/06 - as the main or only constituent of a layer, {which is next to another layer of the same or of a different material
B32B5/18 - characterised by features of a layer {of} foamed material

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08J - WORKING-UP

C08J2201/026 - Crosslinking before of after foaming
C08J2205/04 - characterised by the foam pores
C08J2207/10 - Medical applications, e.g. biocompatible scaffolds
C08J2375/04 - Polyurethanes
C08J9/36 - After-treatment
C08J9/365 - {Coating}

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08L - COMPOSITIONS OF MACROMOLECULAR COMPOUNDS

C08L75/04 - Polyurethanes

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DOE Contract Number:  

AC52-07NA27344; R01EB000462

Resource Type:

Patent

Resource Relation:

Patent File Date: 08/04/2020

Country of Publication:

United States

Language:

English