Ultra-hydrophobic aramid fiber and preparation method thereof
A kind of aramid fiber, super-hydrophobic technology, applied in fiber processing, textiles and papermaking, etc., can solve the problem of poor hydrophobicity of aramid fiber, and achieve the effect of reducing ship resistance, improving operating efficiency and increasing ship buoyancy
Active Publication Date: 2012-09-19
HARBIN INST OF TECH
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AI Technical Summary
Problems solved by technology
[0003] The present invention is to solve the problem of poor hydrophobicity of existing aramid fibers, and provides superhydrophobic aramid fibers and a preparation method thereof
Method used
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specific Embodiment approach 1
[0011] Specific embodiment 1: The superhydrophobic aramid fiber of this embodiment has calcium oxalate or tricalcium phosphate crystals grown on the surface of the aramid fiber, the surface roughness of a single fiber is 120nm-800nm, and the hydrophobic angle of the fiber bundle is 120° ~190°.
specific Embodiment approach 2
[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the surface roughness of a single fiber of the aramid fiber is 200 nm to 700 nm, and the hydrophobic angle of the fiber bundle is 130° to 180°. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0013] Embodiment 3: This embodiment differs from Embodiment 1 in that the surface roughness of a single fiber of the aramid fiber is 400 nm, and the hydrophobic angle of the fiber bundle is 160°. Others are the same as in the first embodiment.
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Abstract
The invention relates to a hydrophobic fiber and a preparation method thereof. The invention solves the problem of bad hydrophobicity of the present aramid fiber. The ultra-hydrophobic aramid fiber grows calcium oxalate or tricalcium phosphate crystal on the surface of the aramid fiber, and the preparation method of the ultra-hydrophobic aramid fiber comprises the following steps: adding excess calcium oxalate or tricalcium phosphate in dilute acid to obtain a supersaturated solution, immersing the clean aramid fiber in the supersaturated solution, adding water to the heated supersaturated solution dropwisely, standing, and then drying to obtain the ultra-hydrophobic aramid fiber. Or the ultra-hydrophobic aramid fiber grows trichloro benzene or polystyrene on the surface of the aramid fiber, and the preparation of the ultra-hydrophobic aramid fiber also can comprise the following steps: adding excess trichloro benzene or polystyrene in ethanol to obtain a supersaturated solution, thenimmersing the clean aramid fiber in the supersaturated solution, heating the supersaturated solution to volatilize ethanol, then drying to obtain the ultra-hydrophobic aramid fiber. The ultra-hydrophobic aramid fiber disclosed in the invention can be used in skin materials of ships and warships.
Description
technical field [0001] The present invention relates to hydrophobic fibers and methods for their preparation. Background technique [0002] The full name of aramid fiber is "poly-p-phenylene terephthalamide". DuPont's product name is Kevlar. Lightweight and other excellent properties, its strength is 5 to 6 times that of steel wire, its modulus is 2 to 3 times that of steel wire or glass fiber, its toughness is 2 times that of steel wire, and its weight is only about 1 / 5 of that of steel wire. Under high temperature, it does not decompose and does not melt. It has good insulation and anti-aging properties, and has a long life cycle, and is widely used in various aspects of the national economy such as aerospace, electromechanical, construction, automobiles, and sporting goods. The existing aramid fiber has poor hydrophobicity, and its contact angle with water is only 45°-60°, which limits the application of aramid fiber in composite materials. Contents of the invention ...
Claims
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IPC IPC(8): D06M13/192D06M11/71D06M101/36
Inventor 姜再兴黄玉东刘丽
Owner HARBIN INST OF TECH