A composite filament includes a core particle comprising a styrene/acrylate polymer resin, and a shell comprising a styrene/acrylate ionomer resin, wherein the styrene/acrylate ionomer resin comprises a metal ion acrylate monomer, and methods of making thereof. Various articles can be manufactured from such composite filaments.

The present disclosure relates to a method for manufacturing an air filtration material, in which the porous metallic support is treated with at least one chemical agent to improve adherence of the electrospun nanofibers. The air filtration material obtained from such method comprises nanoparticle photocatalysts, wherein the nanoparticle photocatalysts are embedded in the electrospun nanofibers and part of the nanoparticle photocatalysts is exposed at the surface of the electrospun nanofibers through nanopores. An air filtration device, comprising the air filtration material, a UV LED and a power source. A method of using the air filtration material wherein an air flow passes through the air filtration material, wherein the air flow has a pollutant content before passing through the material, in order to decrease the air pollutant content. The nanoparticle photocatalysts inactivate or kill the pathogens when the device is in operation.

The present disclosure relates to a method for manufacturing an air filtration material, in which the porous metallic support is treated with at least one chemical agent to improve adherence of the electrospun nanofibers. The air filtration material obtained from such method comprises nanoparticle photocatalysts, wherein the nanoparticle photocatalysts are embedded in the electrospun nanofibers and part of the nanoparticle photocatalysts is exposed at the surface of the electrospun nanofibers through nanopores. An air filtration device, comprising the air filtration material, a UV LED and a power source. A method of using the air filtration material wherein an air flow passes through the air filtration material, wherein the air flow has a pollutant content before passing through the material, in order to decrease the air pollutant content. The nanoparticle photocatalysts inactivate or kill the pathogens when the device is in operation.

The invention relates to an additive-manufacture feedstock, comprising an ethylene-vinyl ester polymer having a melt flow rate of from 0.1 to 150 g/10 min (190° C./2.16 kg), measured according to ASTM D 1238, and a vinyl ester content of from about 1.0 wt % to about 30 wt %, wherein the ethylene-vinyl ester polymer exhibits a Shore A hardness of at least about 60. The pellets and filaments produced from the additive-manufacture feedstock have a high degree of printability in material-extrusion-based 3D printing technology, and can be used to produce 3D printing articles with a high consistency to the targeted 3D model and substantially no warpage. The invention also relates to methods of making the additive-manufacture feedstock and methods of 3D printing using the additive-manufacture feedstock in various forms.

A nanofiber for an air filter and a method for manufacturing the same are proposed. The nanofiber may include a styrene-(meth)acrylate-acrylonitrile random copolymer having a zwitterionic functional group in a side chain. The nanofiber can greatly enhance the bonding of particulate matter (PM) particles with the surface of a polymer by having a high dipole moment derived from the zwitterionic functional group, thereby providing high efficiency of filtration (>99.9%) of the PM particles. Furthermore, the nanofiber can be very usefully used as a core material for air purifier filters and vehicle air purification filters by having low airflow resistance and excellent antibacterial properties.

The present invention relates to a method for producing a carbon fiber. In the method for producing the carbon fiber, a high pure acrylonitrile monomer with specific contents of impurities and a comonomer are used to produce an acrylonitrile copolymer, and the acrylonitrile copolymer is subjected to a spinning operation, a stretching operation, an oxidation treatment and a carbonization treatment in sequence, for obtaining the carbon fiber. The acrylonitrile copolymer with an appropriate falling-ball viscosity and an appropriate weight-average molecular weight is beneficial to the spinning operation, thereby reducing an inner pore diameter and enhancing strength of the resulted carbon fiber.

The present invention relates to a method for producing a carbon fiber. In the method for producing the carbon fiber, a high pure acrylonitrile monomer with specific contents of impurities and a comonomer are used to produce an acrylonitrile copolymer, and the acrylonitrile copolymer is subjected to a spinning operation, a stretching operation, an oxidation treatment and a carbonization treatment in sequence, for obtaining the carbon fiber. The acrylonitrile copolymer with an appropriate falling-ball viscosity and an appropriate weight-average molecular weight is beneficial to the spinning operation, thereby reducing an inner pore diameter and enhancing strength of the resulted carbon fiber.

A method of preparing a polyvinyl alcohol nanofiber membrane includes a material for controlling cell specific adhesion, and a nanofiber membrane that can maintain cellular functions such as cell activity and growth is prepared by adding aqueous solutions containing a polyacrylic acid and a glutaraldehyde crosslinking agent in a polyvinyl alcohol and materials capable of enhancing or regulating cell adhesion, electrospinning, treating with hydrochloric acid vapor and dimethylformaldehyde solvent and treating with sodium hydroxide to control the cell adhesion.

This invention relates to a method of manufacturing a superabsorbent polymer fiber and a superabsorbent polymer fiber manufactured thereby.

The soluble material for three-dimensional modeling that is used as a material of a support material that supports a three-dimensional object when manufacturing the three-dimensional object with a fused deposition modeling type 3D printer. The soluble material for three-dimensional modeling includes at least one copolymer comprising a specific hydrophilic monomer unit and a specific hydrophobic monomer unit. The present invention has a glass transition temperature suitable for the FDM system, has a high dissolution rate in an alkaline aqueous solution, can be quickly removed from a precursor of a three-dimensional object, and makes it possible to suppress or reduce damage to a three-dimensional object.