Provided is an amorphous epoxy fiber excellent in dimensional stability, a fiber structure comprising at least in part amorphous epoxy fibers, and a molded body formed by melting said fibers. The amorphous epoxy fiber has a birefringence value of 0.005 or lower. For example, the amorphous epoxy fiber may include an amorphous epoxy resin represented by the following general formula:

##STR00001## in which, X is a residue of a bivalent phenol and n is 20 or greater (preferably 20 to 300, more preferably 40 to 280, still more preferably 50 to 250). The amorphous epoxy fiber may have an average fiber diameter of single fibers of 40 μm or smaller.

A liquid crystal polyester resin composition containing 100 parts by mass of a liquid crystal polyester resin; and at least 10 parts by mass and at most 100 parts by mass of glass components; wherein the glass components contain glass fibers having a length of more than 30 μm and glass fine powders having a length of at least 4 μm and at most 30 μm; the number-average fiber length of the glass fibers is at least 50 μm and at most 200 μm; and the content of the fine powders is at least 50% and at most 95% relative to a total number of the glass components.

A liquid crystal polyester resin composition containing 100 parts by mass of a liquid crystal polyester resin; and at least 10 parts by mass and at most 100 parts by mass of glass components; wherein the glass components contain glass fibers having a length of more than 30 μm and glass fine powders having a length of at least 4 μm and at most 30 μm; the number-average fiber length of the glass fibers is at least 50 μm and at most 200 μm; and the content of the fine powders is at least 50% and at most 95% relative to a total number of the glass components.

Boron nitride nanotube (BNNT) dispersions and methods of fabricating the same are provided. Tip sonication-assisted hydrolysis can be utilized, with a dispersant/surfactant (e.g., polyvinyl alcohol (PVA)). The fabrication process can be used to obtain large scale BNNT dispersions with long term stability (e.g., stability for at least 3 months, at least 4 months, at least 5 months, at least 6 months, or about 6 months).

Boron nitride nanotube (BNNT) dispersions and methods of fabricating the same are provided. Tip sonication-assisted hydrolysis can be utilized, with a dispersant/surfactant (e.g., polyvinyl alcohol (PVA)). The fabrication process can be used to obtain large scale BNNT dispersions with long term stability (e.g., stability for at least 3 months, at least 4 months, at least 5 months, at least 6 months, or about 6 months).

The invention relates to a cellulose-reinforced polypropylene resin composite material, a preparation method therefor and use thereof. The cellulose-reinforced polypropylene resin composite material comprises, relative to the total weight of the composite material: 65 wt % to 85 wt % of polypropylene resin; 10 wt % to 20 wt % of a cellulose filler; and 1 wt % to 10 wt % of dyed rayon, wherein the color of the dyed rayon is different from that of the polypropylene resin. The cellulose-reinforced polypropylene resin composite material of the invention is environmentally friendly and simple to process, and has a simple molding process. The article prepared therefrom has excellent physical and chemical properties, uniform matte appearance and two-color effect.

The invention relates to a cellulose-reinforced polypropylene resin composite material, a preparation method therefor and use thereof. The cellulose-reinforced polypropylene resin composite material comprises, relative to the total weight of the composite material: 65 wt % to 85 wt % of polypropylene resin; 10 wt % to 20 wt % of a cellulose filler; and 1 wt % to 10 wt % of dyed rayon, wherein the color of the dyed rayon is different from that of the polypropylene resin. The cellulose-reinforced polypropylene resin composite material of the invention is environmentally friendly and simple to process, and has a simple molding process. The article prepared therefrom has excellent physical and chemical properties, uniform matte appearance and two-color effect.

Methods and systems are provided for a composite material. In one example, the composite material includes a polymer base reinforced with a powder formed from pupunha fibers. The resulting composite material is provided as pellets for further processing.

A composition that includes: (a) from 65 to 85% by weight of polypropylene homopolymer in powder form, the average particle size of which is micrometric, (b) from 14 to 30% by weight, preferably 14 to 25% by weight, of natural fibers less than or equal to 2 mm in length, and (c) from 1 to 3% by weight of compatibilizer, its uses for the preparation of a composite material by extrusion, wherein this composite material is useful for preparing a part by injection, in particular a vehicle part whose rigidity is improved.

A composition that includes: (a) from 65 to 85% by weight of polypropylene homopolymer in powder form, the average particle size of which is micrometric, (b) from 14 to 30% by weight, preferably 14 to 25% by weight, of natural fibers less than or equal to 2 mm in length, and (c) from 1 to 3% by weight of compatibilizer, its uses for the preparation of a composite material by extrusion, wherein this composite material is useful for preparing a part by injection, in particular a vehicle part whose rigidity is improved.