FUNCTIONALIZED SUBSTRATES

Abstract

Functionalized substrates, methods of making functionalized substrates, and methods of using functionalized substrates are disclosed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described with reference to the appended figures, wherein:

FIG. 1 depicts exemplary method steps for making functionalized substrates of the present invention; and

FIG. 2 depicts exemplary method steps for making functionalized substrates of the present invention.

Claims

1. An article comprising: a porous base substrate having interstitial and outer surfaces; andgrafted species extending from the surfaces of the porous base substrate, wherein at least one of the grafted species comprises (i) an ethylenically unsaturated group, (ii) an epoxy group or ring-opened epoxy linkage group, (iii) an azlactone group or ring-opened azlactone linkage group, (iv) an isocyanato group, urethane linkage group, or urea linkage group, (v) an ionic group, (vi) an alkylene oxide group, or any combination of (i) to (v).

2. The article of claim 1, wherein the porous base substrate is microporous.

3. The article of claim 1, wherein the article is hydrophilic.

4. The article of claim 1, wherein the grafted species comprises a hydrophilic group.

5. The article of claim 1, wherein the porous base substrate comprises a porous membrane, a porous nonwoven web, or a porous fiber.

6. The article of claim 1, wherein the porous base substrate comprises a microporous, thermally-induced phase separation membrane.

7. The article of claim 6, wherein the thermally-induced phase separation membrane comprises poly(vinylidene fluoride).

8. The article of claim 6, wherein the article has an average final pore size that is larger than an identical porous base substrate without grafted species extending from the interstitial and outer surfaces.

9. The article of claim 1, wherein the article is hydrophilic and comprises a porous base substrate that would be hydrophobic without the grafted species on the interstitial and outer surfaces.

10. The article of claim 1, wherein the grafted species comprises the reaction product of a polyalkylene glycol di(meth)acrylate with the surfaces of the porous base substrate upon exposure to an electron beam.

11. The article of claim 1, wherein the grafted species comprises the reaction product of a glycidyl (meth)acrylate with the surfaces of the porous base substrate upon exposure to an electron beam.

12. The article of claim 1, wherein the grafted species comprises the reaction product of (a) a first grafted species comprising an epoxy group, an isocyanato group, or an azlactone group with (b) a nucleophilic compound comprising a nucleophilic group.

13. The article of claim 12, wherein the nucleophilic compound has at least two nucleophilic groups and the nucleophilic compound reacts with a plurality of grafted species to crosslink the grafted species.

14. The article of claim 1, wherein the article comprises (a) a first grafted species comprising the reaction product of a polyalkylene glycol di(meth)acrylate with the surfaces of the porous base substrate upon exposure to an electron beam and (b) a second grafted species comprising an epoxy group, an isocyanato group, an azlactone group, or an ionic group.

15. The article of claim 1, wherein the article comprises (a) a first grafted species comprising the reaction product of a polyalkylene glycol di(meth)acrylate with the surfaces of the porous base substrate upon exposure to an electron beam and (b) a second grafted species comprising the reaction product of (i) a grafted monomer comprising an epoxy group, an isocyanato group, or an azlactone group with (ii) a nucleophilic compound comprising a nucleophilic group.

16. The article of claim 15, wherein the nucleophilic compound has at least two nucleophilic groups and the nucleophilic compound reacts with a plurality of grafted species to crosslink the grafted species.

17. The article of claim 1, wherein the grafted species comprises the reaction product of polyethylene glycol diacrylate or polyethylene dimethacrylate with the surfaces of the porous base substrate upon exposure to an electron beam.