Composite materials comprising supported porous gels
This invention relates to a composite material that comprises a support member that has a plurality of pores extending through the support member and, located in the pores of the support member, and filling the pores of the support member, a macroporous cross-linked gel. The invention also relates to a process for preparing the composite material described above, and to its use. The composite material is suitable, for example, for separation of substances, for example by filtration or adsorption, including chromatography, for use as a support in synthesis or for use as a support for cell growth.
1. A composite material, comprising:
(a) a support member comprising a plurality of pores extending through the support member, wherein the average pore diameter of the pores is between 0.1 and 25 μm; and
(b) a non-self-supporting gel comprising a polymer derived from a macromonomer selected from the group consisting of poly(ethylene glycol)diacrylate and poly(ethylene glycol)dimethacrylate, wherein the gel comprises a plurality of macropores having an average macropore diameter from about 10 nm to about 3000 nm;
wherein the gel is located in the pores of the support member; and the macropores of the gel are smaller than the pores of the support member.
2. The composite material of claim 1 , wherein the gel is chemically grafted to the surface of the pores of the support member.
3. The composite material of claim 1 , wherein the gel further comprises poly(butyl acrylate), poly(2-(N,N-dimethylamino)ethyl acrylate), poly(n-dodecyl acrylate), poly(2-(2-ethoxyethoxy)ethyl acrylate), poly(2,3-dihydroxypropylacrylate), poly(glycidyl acrylate), poly(n-heptyl acrylate), poly(1-hexadecyl acrylate), poly(2-hydroxyethyl acrylate), poly(hydroxypropyl acrylate), poly(2-(2-methoxy)ethyl acrylate), poly(propyl acrylate), poly(stearyl acrylate), or poly(acrylic acid).
4. The composite material of claim 1 , wherein the gel further comprises a polymer derived from a macromonomer selected from the group consisting of poly(ethylene glycol)acrylate and poly(ethylene glycol)methacrylate.
5. The composite material of claim 1 , wherein the pores of the support member have an average pore diameter of about 0.45 μm.
6. The composite material of claim 1 , wherein the pores of the support member have an average pore diameter of about 0.9 μm.
7. The composite material of claim 1 , wherein the support member comprises woven or non-woven fibrous material.
8. The composite material of claim 1 , wherein the support member comprises a polyolefin.
9. The composite material of claim 1 , wherein the support member comprises polypropylene.
10. The composite material of claim 1 , wherein the support member comprises a material selected from the group consisting of polysulfones, polyethersulfones, polyphenyleneoxides, polycarbonates, polyesters, cellulose, and cellulose derivatives.
11. The composite material of claim 1 , wherein the support member is a thermally-induced phase separation membrane.
12. A method, comprising the steps of:
contacting a fluid comprising a substance with a composite material of claim 1 , thereby adsorbing or absorbing a portion of the substance onto the composite material.
13. The method of claim 12 , wherein a portion of the fluid passes through a macropore in the gel.