Abstract: An enhanced flash evaporation/electrospinning composite spinning equipment includes a flash spinning equipment, an electrospinning equipment, and a grounded receiving conveyor belt; the flash spinning equipment includes a flash spinning spinneret unit, the flash spinning spinneret unit includes a first spinneret, and the first spinneret is grounded; the electrospinning equipment includes a high-voltage power supply and an electrospinning spinneret unit, the electrospinning spinneret unit includes a second spinneret, and the second spinneret is connected to the high-voltage power supply; the first spinneret and the second spinneret are both located above the receiving conveyor belt at opposite positions with a distance of D, and the value range of D is 15-40 cm. The enhanced flash evaporation/electrospinning composite spinning equipment has a simple structure, and can prepare products that are not easy to delaminate, and excellent in waterproof performance and air permeability.

Abstract: A gas permeable polytetrafluoroethylene stretched film is prepared by bending powder of a modified polytetrafluoroethylene resin and powder of a modified fluoropolymer resin and stretching the powder of the modified polytetrafluoroethylene resin and the powder of the modified fluoropolymer resin. The modified polytetrafluoroethylene resin is copolymerised by mixing a tetrafluoroethylene monomer and a modified monomer. The modified monomer is prepared by reaction of hydroxyethyl acrylate, perfluoroalkylethyl acrylate and isocyanate ethylacrylate. The crystallinity in the system is greatly reduced through the multi-branched structure of the modified polytetrafluoroethylene polymer, and at the same time, the strenching strength of the gas permeable polytetrafluoroethylene stretched film is greatly improved through adding the modified fluoropolymer powder. In this manner, the polytetrafluoroethylene stretched film has strong permeability and waterproofness, thereby having stronger safety.

Abstract: A preparation method of the polytetrafluoroethylene stretched film comprises: (1) uniformly mixing a modified polytetrafluoroethylene emulsion and a lubricant, and carrying out extrusion calendaring; and (2) longitudinally stretching and then transversely stretching at a high temperature, and sintering and curing at a high temperature for 5-15 minutes after stretching is completed, to obtain a product, namely the polytetrafluoroethylene stretched film. According to the method, a polymer AOI modified monomer is added, so that the prepared polytetrafluoroethylene stretched film is soft, good in tensile property, small in pore diameter, high in porosity and uniform in pore diameter distribution. In addition, an ammonium salt polymer dispersant is used as a preparation raw material, and a product of the ammonium salt polymer dispersant is green and clean, does not cause environmental pollution and does not participate in human metabolism.

Abstract: In the process of preparing nanofibers by using an electrospinning process and preparing micron fibers by using a flash-spinning process, an electrospinning nozzle and a flash-spinning nozzle are controlled to be located above a receiving conveyor belt, and are directly opposite to each other with a spacing of 15-40 cm, and the electrospinning nozzle is controlled to be connected to a high-voltage power supply, and the flash-spinning nozzle and the receiving conveyor belt are controlled to be grounded to prepare a product; the prepared product has a film-like structure and consists of nanofibers and micron fibers. The micron fibers are mutually entangled, curled and interpenetrated, and the nanofibers are uniformly interspersed and distributed within the micron fibers, some of the nanofibers and the micron fibers forming entangled and interpenetrated structures, with mutual bonding between the nanofibers, between the micron fibers and between the nanofibers and the micron fibers.

Abstract: A gas permeable polytetrafluoroethylene stretched film is prepared by bending power of a modified polytetrafluoroethylene resin and power of a modified fluoropolymer resin and stretching the power of the modified polytetrafluoroethylene resin and the power of the modified fluoropolymer resin. The modified polytetrafluoroethylene resin is copolymerised by mixing a tetrafluoroethylene monomer and a modified monomer. The modified monomer is prepared by reaction of hydroxyethyl acrylate, perfluoroalkylethyl acrylate and isocyanate ethylacrylate. The crystallinity in the system is greatly reduced through the multi-branched structure of the modified polytetrafluoroethylene polymer, and at the same time, the strenching stength of the gas permeable polytetrafluoroethylene stretched film is greatly improved through adding the modified fluoropolymer powder. In this manner, the polytetrafluoroethylene stretched film has strong permeability and waterproofness, thereby having stronger safety.

Abstract: In a method for preparing a nanofiber based oil-water separation and purification material having a shifted inclined-hole structure, firstly, a melt-spinning method is used for preparing a multi-layer fiber membrane, and then according to the requirements of the size, number and arrangement of holes on each layer of fiber membrane, a puncher is used for punching inclined frustum cone-shaped through holes on the fiber membrane. Finally, according to the requirements of relative positions of the inclined frustum cone-shaped through holes on fiber membranes in different layers, multiple layers of fiber membranes are composited to prepare a nanofiber based oil-water separation and purification material having a shifted inclined-hole structure. The oil-water separation and purification material is a multi-layer composite fiber membrane. Each layer of fiber membrane has a plurality of uniformly distributed inclined frustum cone-shaped through holes.

Abstract: The present invention provides a polyurethane nanofiber waterproof moisture-permeable film, a preparation method thereof and application thereof. The polyurethane nanofiber waterproof moisture-permeable film is prepared from two kinds of isothiocyanate and two kinds of polyethylene glycol as raw materials, and the polyurethane nanofiber waterproof moisture-permeable film has good water pressure resistance, tensile property, and moisture permeability. In addition, the polyurethane nanofiber waterproof moisture-permeable film is prepared by adopting an electrostatic spinning method, is low in cost, simple to operate and high in production efficiency, and has a good application prospect in the fields of clothing, medical treatment, electronic appliances, and the like.

Abstract: The present invention provides a system for capturing CO2 and/or SO2, comprising: (a) a CO2 and/or SO2 absorber comprising an amine and/or amino acid salt capable of absorbing the CO2 and/or SO2 to produce a CO2- and/or SO2-containing solution; (b) an amine regenerator to regenerate the amine and/or amino acid salt; and, when the system captures CO2, (c) an alkali metal carbonate regenerator comprising an ammonium catalyst capable catalyzing the aqueous alkali metal bicarbonate into the alkali metal carbonate and CO2 gas. The present invention also provides for a system for capturing SO2, comprising: (a) a SO2 absorber comprising aqueous alkali metal carbonate, wherein the alkali metal carbonate is capable of absorbing the SO2 to produce an alkali metal sulfite/sulfate precipitate and CO2.

Abstract: The present invention provides a system for capturing CO2 and/or SO2, comprising: (a) a CO2 and/or SO2 absorber comprising an amine and/or amino acid salt capable of absorbing the CO2 and/or SO2 to produce a CO2- and/or SO2-containing solution; (b) an amine regenerator to regenerate the amine and/or amino acid salt; and, when the system captures CO2, (c) an alkali metal carbonate regenerator comprising an ammonium catalyst capable catalyzing the aqueous alkali metal bicarbonate into the alkali metal carbonate and CO2 gas. The present invention also provides for a system for capturing SO2, comprising: (a) a SO2 absorber comprising aqueous alkali metal carbonate, wherein the alkali metal carbonate is capable of absorbing the SO2 to produce an alkali metal sulfite/sulfate precipitate and CO2.