Patent ID: 11969695
Assignee: HOKUETSU CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  D | IPC B  C  D

Claim 0:
1. A process for manufacturing a porous body, including:
preparing an aqueous dispersion liquid of nanofibers having water as a dispersion medium with cellulose-based nanofibers that have an average fiber diameter from 1 to 4 nm and dispersed therein,
attaching the aqueous dispersion liquid of nanofibers to a porous support having a plurality of pores that connect with one another,
removing the aqueous dispersion liquid of nanofibers attached to a surface of the porous support excluding an inside of pores of the porous support, and
subsequently drying the porous support including the aqueous dispersion liquid of nanofibers in the pores of the porous support to remove the water dispersion medium;
wherein the porous support is a hydrophilic support;
wherein the nanofibers are part of the hydroxyl groups in cellulose molecules in the cellulose-based nanofibers, in which a part of the hydroxyl groups in the cellulose molecules are oxidized to at least one functional group selected from the group consisting of a carboxyl group and an aldehyde group, and have a cellulose type I crystal structure;
wherein the attaching comprises forming a microthin film of the aqueous dispersion liquid of nanofibers in the pores of the porous support;
wherein the nanofibers in the aqueous dispersion liquid of nanofibers are entangled to form net-like structural bodies in the microthin film; and
wherein the drying comprises removing the water from the microthin film to form the net-like structural bodies in which the nanofibers are entangled in the pores, and the drying is performed by at least one drying operation selected from the group consisting of: forced drying by heat, and natural drying by ambient air.