Biocompatible materials

A 3D printed device, the device comprising a shape memory polymer, the shape memory polymer being a cross-linked polymer and being able to undergo a morphological change from a first state to a second state upon induction by an external stimulus, the cross-linked polymer having a dry modulus value of from 1 MPa and 2 GPa, and a glass transition temperature of between -10° C. and 150° C., the 3D printed device being porous and having pores in the size range of 200 µm to 1500 µm.

The 3D printed device according to claim 1, wherein the glass transition temperature of the crossed linked polymer is between 20 to 80° C., for example between 35 to 45° C. such as between 36.5 and 37.5° C.

The 3D printed device according to claim 1, wherein the porosity of the crosslinked polymer is from 0.7 to 0.95.

The 3D printed device according to claim 1, wherein the crosslinked polymer comprises at least one carbonate linkage.

The 3D printed device according to claim 1, wherein the crosslinked polymer comprises at least one O=C-N linkage.

The 3D printed device according to claim 5, wherein the O=C-N linkage is selected from a urethane or urea moiety.

The 3D printed device according to claim 1, wherein the crosslinked polymer is fabricated from a resin composition comprising a prepolymer, wherein the prepolymer comprises repeating units having at least one carbonate linkage and at least one unsaturated side chain.

The 3D printed device according to claim 7, wherein the resin composition further comprises at least one diluent, and wherein one of the prepolymer or the diluent comprises at least one O=C-N linkage.

The 3D printed device according to claim 1, wherein the cross-linked polymer is degradable into degradation products upon exposure to water, acid, base, heat, enzymes, solvent, and/or oxidisers.

The 3D printed device according to claim 1, wherein the device is selected from a medical device, an implantable medical device, or a tissue scaffold.

A 3D printed crosslinked polymer, the polymer comprising a carbonate linkage and an O=C-N linkage.

The 3D printed crosslinked polymer according to claim 11, wherein the O=C-N linkage is selected from a urethane or urea bond.

The 3D printed crosslinked polymer according to claim 11, wherein crosslinked polymer is porous and has pores in the size range of 200 µm to 1500 µm.

The 3D printed crosslinked polymer according to claim 11, wherein the porosity of the crosslinked polymer is from 0.7 to 0.95.

The 3D printed crosslinked polymer according to claim 11, wherein the a glass transition temperature of the crosslinked polymer is between -10° C. and 150° C.

The 3D printed crosslinked polymer according to claim 11, wherein the dry modulus value of the crosslinked polymer is from 1 MPa and 2 GPa.

The 3D printed crosslinked polymer according to claim 11, which is able to undergo a morphological change from a first state to a second state upon induction by an external stimulus.

The 3D printed crosslinked polymer according to claim 11, wherein the cross-linked polymer is degradable into degradation products upon exposure to water, acid, base, heat, enzymes, solvent, and/or oxidisers.

The 3D printed crosslinked polymer according to claim 11, wherein the cross-linked polymer is a device selected from a medical device, an implantable medical device, or a tissue scaffold.

A 3D printed device, the device comprising a shape memory polymer, the shape memory polymer being a cross-linked polymer and being able to undergo a morphological change from a first state to a second state upon induction by an external stimulus, the cross-linked polymer comprising a carbonate moiety and an O=C-N linkage.