A wholly aromatic polyamide fiber has a reduced total fineness and a reduced single yarn fineness and is also excellent in quality and reinforcing property. The wholly aromatic polyamide fiber is characterized in that it has a single yarn fineness of 0. 4 dtex to 3. 5 dtex, a total fineness of 5 dtex to 30 dtex, a breaking strength of 15 cN/dtex or more, an initial tensile modulus of 500 cN/dtex to 750 cN/dtex, and the number of fibrils of less than 100/m.

A continuous wire drive system for a needleless electrospinning apparatus, the electrospinning apparatus including an electrospinning enclosure and within which a nanoscale or submicron scale polymer fiber web is formed onto a substrate from a liquid polymer layer coated onto a plurality of continuous electrode wires passing through the electrospinning enclosure. The continuous wire drive system includes a master wire drive drum and a slave wire drive drum, each of the master wire drive drum and slave wire drive drum including a plurality of wire guides, each of the wire guides including a channel or groove for receiving one of the plurality of continuous electrode wires. The continuous wire drive system is external to the electrospinning apparatus, and the continuous wire drive system drives the plurality of continuous electrode wires through the electrospinning enclosure.

A fiber-based device having a reconfigurable geometry comprises an array of hair-like fibers spaced apart on a substrate, where each hair-like fiber comprises a free end extending away from the substrate and a secured end attached to the substrate. The array has a first bundled configuration where the free ends of the hair-like fibers are drawn together into a bundle having a first cross-sectional shape, and a second bundled configuration where the free ends of the hair-like fibers are drawn together into a bundle having a second cross-sectional shape. The array is reconfigurable from the first bundled configuration to the second bundled configuration by exposure to a liquid and then removal of the liquid at a predetermined rate.

A fiber-based device having a reconfigurable geometry comprises an array of hair-like fibers spaced apart on a substrate, where each hair-like fiber comprises a free end extending away from the substrate and a secured end attached to the substrate. The array has a first bundled configuration where the free ends of the hair-like fibers are drawn together into a bundle having a first cross-sectional shape, and a second bundled configuration where the free ends of the hair-like fibers are drawn together into a bundle having a second cross-sectional shape. The array is reconfigurable from the first bundled configuration to the second bundled configuration by exposure to a liquid and then removal of the liquid at a predetermined rate.

A method of wet spinning poly (3,4-ethylenedioxythiopene):poly (styrenesulfonate) or PEDOT:PSS fibers produces PEDOT:PSS fibers having a unique combination of electrical conductivity, thermal conductivity and Young's modulus properties.

The present disclosure discloses a method for preparing cellulose fiber. The method includes the following steps: 1) mixing cellulose pulp with NMMO aqueous solution of a mass concentration of 60%-85%, preferably 70% to 76%, to obtain a uniform mixture; 2) subjecting the obtained uniform mixture to dewatering for swelling, dissolution, and deaerating to obtain a cellulose spinning stock solution; 3) the cellulose spinning stock solution entering into a spinning machine after being filtered and heat exchange, and entering into a coagulation system after carrying out extruding by a spinneret-pack and cooling by air, and then coagulating in a NMMO coagulating bath of a mass concentration of 50% to 72% to obtain nascent fiber; and 4) subjecting the nascent fiber to rinsing to obtain a fiber filament bundle, and then, performing subsequent-section treatment to obtain cellulose fiber.

The present disclosure discloses a method for preparing cellulose fiber. The method includes the following steps: 1) mixing cellulose pulp with NMMO aqueous solution of a mass concentration of 60%-85%, preferably 70% to 76%, to obtain a uniform mixture; 2) subjecting the obtained uniform mixture to dewatering for swelling, dissolution, and deaerating to obtain a cellulose spinning stock solution; 3) the cellulose spinning stock solution entering into a spinning machine after being filtered and heat exchange, and entering into a coagulation system after carrying out extruding by a spinneret-pack and cooling by air, and then coagulating in a NMMO coagulating bath of a mass concentration of 50% to 72% to obtain nascent fiber; and 4) subjecting the nascent fiber to rinsing to obtain a fiber filament bundle, and then, performing subsequent-section treatment to obtain cellulose fiber.

Iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites, preparation method and its application in wastewater treatment are disclosed. Bismuth citrate and sodium carbonate as precursors, sodium carbonate as a precipitating agent, dispersed in a mixed solution of water and ethylene glycol, sodium iodide as a iodine source, nano carbon fiber membrane act as the carrier, to synthesis carbon fiber membrane that modified by iodine-doped Bi.sub.2O.sub.2CO.sub.3 nanosheets; then sodium molybdate and thioacetamide as precursors, dispersed in water to react to obtain iodine doped bismuthyl carbonate nanosheet and molybdenum disulfide modified carbon nanofiber composites. The composite material synthesized through a series of steps exhibit excellent photocatalytic activity for the degradation of Rhodamine B and can be recycled for many times. And this invention has the advantages of simple preparation process, easy recovery and multiple use, etc., and has industrial application prospect in water pollution treatment.

A polymer comprising repeating units derived from a first monomer, typically acrylonitrile, and repeating units derived from a second monomer different from the first monomer, wherein the second monomer is a compound comprising an ethylenically unsaturated organic anion and an organic cation containing a C═N imine group; a process for producing carbon fibers using the said polymer; and carbon fibers made therefrom, are described herein.

A polymer comprising repeating units derived from a first monomer, typically acrylonitrile, and repeating units derived from a second monomer different from the first monomer, wherein the second monomer is a compound comprising an ethylenically unsaturated organic anion and an organic cation containing a C═N imine group; a process for producing carbon fibers using the said polymer; and carbon fibers made therefrom, are described herein.