Systems and techniques can be used to invert an emulsion polymer under ultra-high shear. In some examples, a method for inverting an emulsion involves introducing the emulsion into a process liquid to form a dilute emulsion. The emulsion may be defined by a continuous phase and a discontinuous phase containing a polymer, with the polymer being soluble in the process liquid but the continuous phase being immiscible in the process liquid. A fluid pressurization device can pressurize the dilute emulsion to form a pressurized dilute emulsion. Thereafter, the pressurized dilute emulsion can be passed through a multi-channel flow restrictor, such as a capillary bundle, thereby generating a shear force for dispersing and inverting the emulsion in the process liquid.

A microfibrous cellulose aggregate containing microfibrous cellulose having an average fiber width of 2 nm to 50 nm and a liquid compound including at least one of water or an organic solvent. The content of the microfibrous cellulose is from 6 mass % to 80 mass % per the mass of the entire microfibrous cellulose aggregate, and the content of the liquid compound is at least 15 mass % per the mass of the entire microfibrous cellulose aggregate.

A microfibrous cellulose aggregate containing microfibrous cellulose having an average fiber width of 2 nm to 50 nm and a liquid compound including at least one of water or an organic solvent. The content of the microfibrous cellulose is from 6 mass % to 80 mass % per the mass of the entire microfibrous cellulose aggregate, and the content of the liquid compound is at least 15 mass % per the mass of the entire microfibrous cellulose aggregate.

Disclosed is a method for preparing a matrix containing metal-organic frameworks (MOFs), comprising the steps of: 1) mixing an organic ligand precursor solution and an anionic polymer-containing solution to produce a mixed solution; and 2) adding a metal salt to the mixture solution. In addition, the present disclosure provides a matrix containing MOFs prepared according to the preparation method, and an adsorbent comprising the same. Furthermore, a method for performing fluid separation by using a matrix containing MOFs prepared according to the preparation method is disclosed.

Polymer fine particles having a number average particle diameter of 50 to 450 nm and a CV value of particle diameter on a number basis of 5% or less, or polymer fine particles having a structural color development property when arranged. An acid value of the polymer fine particles is 5 to 38 mg KOH/g. An emulsion in which the polymer fine particles are dispersed in a medium mainly containing water. In addition, a structure in which the polymer fine particles are arranged and develop color.

Polymer fine particles having a number average particle diameter of 50 to 450 nm and a CV value of particle diameter on a number basis of 5% or less, or polymer fine particles having a structural color development property when arranged. An acid value of the polymer fine particles is 5 to 38 mg KOH/g. An emulsion in which the polymer fine particles are dispersed in a medium mainly containing water. In addition, a structure in which the polymer fine particles are arranged and develop color.

Provided is a method of producing a slurry that enables simple production of a slurry in which fibrous carbon nanostructures are favorably dispersed. The method of producing a slurry includes: a mixing step of mixing resin particles having an average particle diameter of at least 1 μm and not more than 700 μm, fibrous carbon nanostructures, and a dispersion medium to obtain a mixed liquid; and a dispersing step of subjecting the mixed liquid to dispersion treatment using a wet medialess disperser under conditions in which pressure acting on the mixed liquid (gauge pressure) is 5 MPa or less to obtain a slurry. The fibrous carbon nanostructures preferably include carbon nanotubes.

Provided is a method of producing a slurry that enables simple production of a slurry in which fibrous carbon nanostructures are favorably dispersed. The method of producing a slurry includes: a mixing step of mixing resin particles having an average particle diameter of at least 1 μm and not more than 700 μm, fibrous carbon nanostructures, and a dispersion medium to obtain a mixed liquid; and a dispersing step of subjecting the mixed liquid to dispersion treatment using a wet medialess disperser under conditions in which pressure acting on the mixed liquid (gauge pressure) is 5 MPa or less to obtain a slurry. The fibrous carbon nanostructures preferably include carbon nanotubes.

To provide a liquid composition with which a catalyst layer and a polymer electrolyte membrane will hardly be broken at the time of their formation and a method for producing the liquid composition; and a method for producing a membrane/electrode assembly by which a catalyst layer and a polymer electrolyte membrane will hardly be broken at the time of their formation. A liquid composition comprising a polymer having ion exchange groups, water and an organic solvent, wherein the average secondary particle size of the polymer having ion exchange groups is from 100 to 3,000 nm, and the primary particle size parameter represented by the product of the average primary particle size (nm) and the ion exchange capacity (meq/g dry resin) of the polymer having ion exchange groups, is from 12 to 20.

To provide a liquid composition with which a catalyst layer and a polymer electrolyte membrane will hardly be broken at the time of their formation and a method for producing the liquid composition; and a method for producing a membrane/electrode assembly by which a catalyst layer and a polymer electrolyte membrane will hardly be broken at the time of their formation. A liquid composition comprising a polymer having ion exchange groups, water and an organic solvent, wherein the average secondary particle size of the polymer having ion exchange groups is from 100 to 3,000 nm, and the primary particle size parameter represented by the product of the average primary particle size (nm) and the ion exchange capacity (meq/g dry resin) of the polymer having ion exchange groups, is from 12 to 20.