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AssigneeInternational Business Machines Corporation
InventorsDylan J. Boday, Jeannette M. Garcia, James L. Hedrick, Rudy J. Wojtecki
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Methods of forming nanoporous materials are described herein that include forming a polymer network with a chemically removable portion. The chemically removable portion may be polycarbonate polymer that is removable on application of heat or exposure to a base, or a polyhexahydrotriazine (PHT) or polyhemiaminal (PHA) polymer that is removable on exposure to an acid. The method generally includes forming a reaction mixture comprising a formaldehyde, a solvent, a primary aromatic diamine, and a diamine having a primary amino group and a secondary amino group, the secondary amino group having a base-reactive substituent, and heating the reaction mixture to a temperature of between about 50 deg C. and about 150 deg C. to form a polymer. Removing any portion of the polymer results in formation of nanoscopic pores as polymer chains are decomposed, leaving pores in the polymer matrix.
An article comprising a porous polymer having a plurality of hexahydrotriazine units, a plurality of hemiaminal units, or a combination thereof, the porous polymer having an average pore size less than about 100 nm and density less than about 1.5 g/cm3, wherein the porous polymer has a plurality of hexahydrotriazine units having the general structure
An article comprising a porous polymer having a plurality of hexahydrotriazine units, a plurality of hemiaminal units, or a combination thereof, the porous polymer having an average pore size of 20-100 nm and bulk density of 1.0-1.5 g/cm3, wherein the porous polymer has a plurality of hexahydrotriazine units having the general structure
An article comprising a porous polymer having a plurality of hexahydrotriazine units, hemiaminal units, or both, the porous polymer having an average pore size of 20-100 nm and bulk density of 1.0-1.5 g/cm3, wherein the plurality of hexahydrotriazine units, hemiaminal units, or both are bonded together by a divalent aromatic linkage or a trivalent aromatic linkage.
Dependencies are inferred from the claim text.