Flame resistant fabrics that comply with applicable thermal requirements (e.g., char length, after flame, thermal shrinkage, etc.) but only include thermally stable fibers in yarns extending in a single fabric direction (warp or weft). The yarns extending in the other direction (warp or weft) are devoid of thermally stable fibers.

The present disclosure discloses a phase-change flame-retardant fiber material for thermal management of a lithium ion battery in a closed space and a preparation method. The phase-change flame-retardant fiber material is prepared in a coaxial electrostatic spinning manner and includes a composite phase-change fiber material PASA-TPU at a core part and a flame-retardant fiber material TB-PAN wrapping a surface of the core part. The composite phase-change fiber material is well wrapped with the flame-retardant fiber material, and the lithium ion battery wrapping the whole phase-change flame-retardant fiber material in the closed space is subjected to charge-discharge cycle; the result shows that the surface temperature of the battery can be effectively reduced by about 20° C. by the material, and the material can effectively play a role in multiple cycle processes; the whole material has an excellent and stable heat absorption effect, and has no leakage and collapse; and the phase-change flame-retardant fiber material only has thermal shrinkage and blackening phenomena and is not combusted after being ignited by open fire for over 20 s. Therefore, the phase-change flame-retardant fiber material of the present disclosure has a relatively good flame-retardant effect compared with other phase-change materials.

The present disclosure discloses a phase-change flame-retardant fiber material for thermal management of a lithium ion battery in a closed space and a preparation method. The phase-change flame-retardant fiber material is prepared in a coaxial electrostatic spinning manner and includes a composite phase-change fiber material PASA-TPU at a core part and a flame-retardant fiber material TB-PAN wrapping a surface of the core part. The composite phase-change fiber material is well wrapped with the flame-retardant fiber material, and the lithium ion battery wrapping the whole phase-change flame-retardant fiber material in the closed space is subjected to charge-discharge cycle; the result shows that the surface temperature of the battery can be effectively reduced by about 20° C. by the material, and the material can effectively play a role in multiple cycle processes; the whole material has an excellent and stable heat absorption effect, and has no leakage and collapse; and the phase-change flame-retardant fiber material only has thermal shrinkage and blackening phenomena and is not combusted after being ignited by open fire for over 20 s. Therefore, the phase-change flame-retardant fiber material of the present disclosure has a relatively good flame-retardant effect compared with other phase-change materials.

An aqueous liquid of a carbon fiber precursor treatment agent contains a carbon fiber precursor treatment agent and water, the carbon fiber precursor treatment agent containing an amino-modified silicone and a particular nonionic surfactant having a molecular weight distribution (Mw/Mn) of from 1.05 to 1.50. The amino-modified silicone may have a kinematic viscosity at 25° C. of 50 to 4,000 mm.sup.2/s. The carbon fiber precursor treatment agent is adhered to a carbon fiber precursor.

A flexible, ignition resistant, non-electrically conductive biregional fiber is disclosed. The biregional fiber comprising an inner core region of a partially oxidized thermoplastic polymeric composition and a surrounding outer sheath region of a thermoset carbonaceous material.

A flexible, ignition resistant, non-electrically conductive biregional fiber is disclosed. The biregional fiber comprising an inner core region of a partially oxidized thermoplastic polymeric composition and a surrounding outer sheath region of a thermoset carbonaceous material.

A method is disclosed of forming core-shell iron oxide-polymer nanofiber composites. The method includes synthesizing composite nanofibers of polyacrylonitrile (PAN) with embedded hematite (α-Fe.sub.2O.sub.3) nanoparticles via a single-pot electrospinning synthesis; and generating a core-shell nanofiber composite through a subsequent hydrothermal growth of α-Fe.sub.2O.sub.3 nanostructures on the composite nanofibers of polyacrylonitrile (PAN) with the embedded hematite (α-Fe.sub.2O.sub.3) nanoparticles.

A method is disclosed of forming core-shell iron oxide-polymer nanofiber composites. The method includes synthesizing composite nanofibers of polyacrylonitrile (PAN) with embedded hematite (α-Fe.sub.2O.sub.3) nanoparticles via a single-pot electrospinning synthesis; and generating a core-shell nanofiber composite through a subsequent hydrothermal growth of α-Fe.sub.2O.sub.3 nanostructures on the composite nanofibers of polyacrylonitrile (PAN) with the embedded hematite (α-Fe.sub.2O.sub.3) nanoparticles.

The present invention relates to a method for producing hollow activated carbon nanofibers for activating peroxymonosulfate used in water purification; a catalyst for water purification comprising the hollow active carbon nanofibers produced by the method; and a method for purifying contaminated water using the catalyst. The production method of the present invention can easily produce hollow activated carbon nanofibers capable of rapidly purifying contaminated water by highly efficiently activating peroxymonosulfate used for water purification.

Provided is a composite yarn. The composite yarn includes a core and a sheath. The core is made of a thermoplastic material; wherein the thermoplastic material is selected from a group consisting of: a polyester, a polyamide, a polyacrylonitrile and any combination thereof. The sheath formed around the core is made of a cladding material, and the cladding material comprises polyvinyl butyral; wherein the polyvinyl butyral has a melt flow rate ranging from 2 g/10 min to 35 g/10 min; the melt flow rate is measured by a standard method ASTM D1238 at 190° C. with 2.16 kg load.