A water filtration membrane is provided, capable of removing heavy metal ions, filtering out particulates, filtering out bacteria, as well as removing herbicides and volatile organic compounds (VOCs) from water. The membrane is composed of a mat of randomly oriented nanoparticle-coated nanofibers. The nanofibers are covalently bonded to a plurality of substantially uniformly-distributed ceramic nanoparticles embedded in or adhered on the surface of the polymer nanofibers through reactive functional groups. The ceramic nanoparticles have a pattern of deep grooves formed on the nanoparticle surfaces. The bonding of the nanoparticles to the nanofibers is sufficient to retain the nanoparticles on the nanofiber surfaces when water flows through the water filtration membrane. The diameter of the nanofibers is 50-200 nm. The size of the nanoparticles is <40 nm, with a zeta potential of 40 to 45 mV in a dispersion medium. The nanoparticle deep grooves have an average size of approximately 1.2 nm or less.

An oil agent for a carbon fiber precursor is provided that contains a base component, a cationic surfactant, and a nonionic surfactant, wherein the cationic surfactant is a specific nitrogen-containing compound.

A manufacturing method and an apparatus enable high productivity. A method for manufacturing an oxidized fiber bundle includes joining an upstream precursor fiber bundle and a downstream precursor fiber bundle together with a joining fiber bundle, and oxidizing the joined precursor fiber bundles by feeding the joined precursor fiber bundles through an oxidization furnace. The joining includes applying an oiling agent to a joint area of a joining target precursor fiber bundle before joining the joining target precursor fiber bundle and the joining fiber bundle together. A quantity of the oiling agent adhering to the joint area is 0.15 to 0.85 wt %.

A multifunctional high-strength composite fabric coating agent, a coating, a method for preparing the same and an application thereof are provided. The fabric coating agent includes a resin, a reinforcing agent with a reactive group, a bifunctional dispersing agent, a leveling agent, a film forming agent, a softening agent, an antibacterial agent, a solvent, and the like. The reinforcing agent is modified such that it has active functional groups of OH and NH.sub.3. The fabric coating agent is not only easy to apply, fast to react and stabilize, but also suitable for a fabric surface of any material. A treated fabric has high tensile-breaking strength, excellent tearing and bursting performance, good waterproof-and-moisture-permeability and antibacterial performance, and high adhesion. It can be repeatedly knife coated, roll coated, calendared, or dipped. The method is not only mature in technology and low in production cost, but also suitable for large-scale application.

The present invention provides super-hydrophobic fabrics and a preparation method thereof, and belong to the field of textiles. The super-hydrophobic fabrics are obtained by finishing Pickering emulsion formed by amphiphilic particles stabilizing low-surface-energy substances in water. Via a one-step finishing method using Pickering emulsion technology, facile preparation of durable super-hydrophobic fabrics is realized. The static contact angle between the finished fabric surfaces and water droplets is greater than 150 degrees, and the water droplets can roll off easily; and after being subjected to 30 times of standard washing tests, the finished fabrics still maintains excellent water repellency. In addition, the Pickering emulsion preparation and finishing process of the present invention are environmentally friendly, pollution-free, facile to operate and widely applicable.

An arc resistant acrylic fiber includes an acrylic polymer. The arc resistant acrylic fiber also includes an infrared absorber in an amount of 1 wt % to 30 wt % with respect to a total weight of the acrylic polymer.

The invention discloses a durable super-hydrophobic fabric and a preparation method thereof. The preparation method comprises the following steps: soaking a fabric into a mixed solution of tetraethoxysilane and hydroxy-terminated polydimethylsiloxane; taking out the fabric and then placing it into a closed container filled with a hydrochloric acid solution and above the liquid level of the hydrochloric acid solution; reacting for 0.5-2 h under the temperature of 30-60 DEG C. to give the durable super-hydrophobic fabric. The fabric prepared according to the invention has a water drop surface static contact angle of more than 150 such that the water drop is easy to roll on the surface of the fabric, and has excellent chemical stability and mechanical durability. In addition, the preparation process is simple and pollution-free.

An oil for a carbon fiber precursor acrylic fiber including: a hydroxybenzoate ester (A) indicated by formula (1a); an amino-modified silicone (H) indicated by formula (3e); and an organic compound (X) which is compatible with the hydroxybenzoate ester (A), in which a residual mass rate R1 at 300 C. in thermal mass analysis in an air atmosphere is 70-100 mass % inclusive, and which is a liquid at 100 C., and a carbon fiber precursor acrylic fiber bundle to which the oil for a carbon fiber precursor acrylic fiber is adhered. ##STR00001##

Provided is a composition for the treatment of fibers, such as PAN precursor fibers. The finish composition includes a polysiloxane; an emulsifier; water; and a dicarboxylic acid having a pK.sub.a from 1 to 4, and boiling point from 200 to 400 C. The dicarboxylic acid may have the following formula:

##STR00001##

where R.sub.1 is absent or a saturated or unsaturated, linear or branched, aromatic substituted or unsubstituted, hydrocarbon group; Y.sub.1 and Y.sub.2 are independently hydrogen, nitrogen, oxygen, sulfur, phosphorus, C.sub.1-C.sub.6 alkyl group, or an alkoxy group; and X.sub.1 and X.sub.2 are independently one or more hydrogen atoms, a metal, a quaternary amine, or a hydrocarbon group having up to 6 carbon atoms, the hydrocarbon group being an alkyl group, an alkylene group, or an aromatic group, which may be branched or linear, and may optionally have one or more heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur and phosphorus.

Carbon fiber and method of forming the same are provided. The method modifies proportion of a finishing oil to control a relation between a surface tension and a particle size of the finishing oil, and thus penetration of the finishing oil into an interior of the carbon fiber is avoided. Therefore, the carbon fiber can have both low oil residues and a high strength.