Provided herein are nanofibers and processes of preparing carbonaceous nanofibers. In some embodiments, the nanofibers are high quality, high performance nanofibers, highly coherent nanofibers, highly continuous nanofibers, or the like. In some embodiments, the nanofibers have increased coherence, increased length, few voids and/or defects, and/or other advantageous characteristics. In some instances, the nanofibers are produced by electrospinning a fluid stock having a high loading of nanofiber precursor in the fluid stock. In some instances, the fluid stock comprises well mixed and/or uniformly distributed precursor in the fluid stock. In some instances, the fluid stock is converted into a nanofiber comprising few voids, few defects, long or tunable length, and the like.

Provided herein are nanofibers and processes of preparing carbonaceous nanofibers. In some embodiments, the nanofibers are high quality, high performance nanofibers, highly coherent nanofibers, highly continuous nanofibers, or the like. In some embodiments, the nanofibers have increased coherence, increased length, few voids and/or defects, and/or other advantageous characteristics. In some instances, the nanofibers are produced by electrospinning a fluid stock having a high loading of nanofiber precursor in the fluid stock. In some instances, the fluid stock comprises well mixed and/or uniformly distributed precursor in the fluid stock. In some instances, the fluid stock is converted into a nanofiber comprising few voids, few defects, long or tunable length, and the like.

An inorganic fiber-formed article, composed of a mat-shaped inorganic fiber assembly, the inorganic fiber-formed article including needle marks that extend in a direction including a thickness direction of the mat-shaped inorganic fiber assembly, where the needle marks include needle marks A and needle marks B having a diameter smaller than that of the needle marks A, dense portions in which a plurality of the needle marks A lie densely are arranged apart, non-dense portions in which a needle mark density of the needle marks A is lower than that in the dense portions are present between the dense portions in both a first direction which is any mat-surface direction extending through the dense portions and a second direction orthogonal to the first direction, and the needle marks B are present at least in the non-dense portions.

An inorganic fiber-formed article, composed of a mat-shaped inorganic fiber assembly, the inorganic fiber-formed article including needle marks that extend in a direction including a thickness direction of the mat-shaped inorganic fiber assembly, where the needle marks include needle marks A and needle marks B having a diameter smaller than that of the needle marks A, dense portions in which a plurality of the needle marks A lie densely are arranged apart, non-dense portions in which a needle mark density of the needle marks A is lower than that in the dense portions are present between the dense portions in both a first direction which is any mat-surface direction extending through the dense portions and a second direction orthogonal to the first direction, and the needle marks B are present at least in the non-dense portions.

A method for manufacturing a carbon nanotube assembled wire includes: a first step of supplying a carbon-containing gas at one, first end of a tubular carbon nanotube synthesis furnace to grow a carbon nanotube from each of a plurality of catalyst particles suspended in the carbon nanotube synthesis furnace to synthesize a plurality of carbon nanotubes; a second step of orienting the plurality of carbon nanotubes in a longitudinal direction of the carbon nanotubes in a first channel provided in the carbon nanotube synthesis furnace, and thus assembling them together, to form a carbon nanotube assembled wire; and a third step of collecting the carbon nanotube assembled wire using a collecting gas stream flowing from a second end of the carbon nanotube synthesis furnace opposite to the first end in a direction away from the carbon nanotube synthesis furnace.

A method for producing ceramic fibers of a composition in the SiC range, starts from a spinning material that contains a polysilane-polycarbosilane copolymer solution. The spinning material is extruded through spinnerets in a dry spinning method and spun through a spinning duct into green fibers, and the green fibers are subsequently pyrolyzed. Accordingly, the polysilane-polycarbosilane solution contains between 75 wt. % and 95 wt. %, in particular between 80 and 90 wt. %, of an indifferent solvent, and the spinnerets have a capillary diameter between 20 and 70 m, in particular between 30 and 60 m, in particular between 40 and 50 m.

A method for producing ceramic fibers of a composition in the SiC range, starts from a spinning material that contains a polysilane-polycarbosilane copolymer solution. The spinning material is extruded through spinnerets in a dry spinning method and spun through a spinning duct into green fibers, and the green fibers are subsequently pyrolyzed. Accordingly, the polysilane-polycarbosilane solution contains between 75 wt. % and 95 wt. %, in particular between 80 and 90 wt. %, of an indifferent solvent, and the spinnerets have a capillary diameter between 20 and 70 m, in particular between 30 and 60 m, in particular between 40 and 50 m.

The invention includes systems and methods for forming organized carbon solids, such as high-structure carbon black, from a hydrocarbon precursor. These systems and methods comprise selection of feedstock for forming the carbon black and seeding the reaction chamber to enhance surface-promoted deposition of high quality carbon black solids.

A method of enhancing a fibre from a staple fibre precursor comprising: obtaining a staple fibre precursor, tensioning and aligning the fibre precursor along a fibre axis and subjecting the aligned staple fibre to an oxidation process, wherein the oxidation process comprises subjecting the tensioned fibre precursor to a general gradient of increasing temperatures in successive multiple stabilisation/oxidation ovens, the ovens ranging in temperature from 50 to 500 degrees Celsius.

A method of enhancing a fibre from a staple fibre precursor comprising: obtaining a staple fibre precursor, tensioning and aligning the fibre precursor along a fibre axis and subjecting the aligned staple fibre to an oxidation process, wherein the oxidation process comprises subjecting the tensioned fibre precursor to a general gradient of increasing temperatures in successive multiple stabilisation/oxidation ovens, the ovens ranging in temperature from 50 to 500 degrees Celsius.