Small fiber balls for solid buoyancy material and preparation method of small fiber balls

A solid buoyancy and fiber technology, applied in the field of fiber pellets and their preparation, can solve the problems of low strength, low density, and difficult processing, and achieve the effects of improving production efficiency, controllable performance, and reducing labor intensity.

Active Publication Date: 2014-03-26
SHANGHAI COMPOSITES SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention combines high-end aerospace fiber materials with resin binders to form a certain thickness of fiber-reinforced resin-based composite materials on the surface of spherical foams on the basis of spherical foams as nucleating carriers through formula design and optimization of technical processes. The material layer can effectively solve the shortcomings of the existing composite foam, such as difficulty in preparation and processing, and low strength, and provide a fiber pellet and a preparation method thereof that meet the application requirements of low-density, high-strength solid buoyancy materials

Method used

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  • Small fiber balls for solid buoyancy material and preparation method of small fiber balls

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Embodiment 1

[0038] In this embodiment, polystyrene foam balls are used as the nucleating carrier, and a layer of fiber-reinforced resin-based composite material is coated on the surface thereof, thereby forming a fiber ball with a core-shell structure.

[0039]The specific preparation steps are: (1) use 100 mesh powdered polyacrylonitrile carbon fiber (diameter is 10 μ m, length is 100 μ m) and epoxy resin system (can be diglycidyl ether epoxy resin, polyglycidyl ether epoxy resin, Glycidylamine epoxy resin or epoxy resin modified by polysulfide rubber; select diglycidyl ether epoxy resin for use in the present embodiment) fully mix into muddy slurry, the mass fraction of fiber is 60wt%; (2) will The epoxy resin system mixed with 20wt% dibromocresol glycidyl ether diluent has an average diameter of 15mm and a density of 0.03g / cm 3 The expandable polystyrene (EPS) foam ball is fully stirred, and the foam surface is coated with a layer of epoxy resin, and the mass ratio of the foam ball to ...

Embodiment 2

[0042] The difference between this example and Example 1 is that the powdery fiber used in the prepared fiber pellets for solid buoyancy material is 150 mesh high-strength alkali-free glass fiber. Other steps and parameter are identical with embodiment 1. The average diameter of the prepared fiber pellets is 20mm, the apparent color is off-white, and the apparent density is 0.8g / cm 3 , The thickness of the composite material layer is about 2mm, and the hydrostatic pressure resistance is 220MPa. Compared with Example 1, the low compressive strength is mainly due to the fact that the powder fiber used is glass fiber, which has poorer mechanical properties than the more excellent carbon fiber.

Embodiment 3

[0044] The difference between this example and Example 1 is that the resin system used to prepare the fiber pellets for solid buoyancy material is a thermosetting phenolic resin, and the curing method is 60°C for 2 hours plus 120°C for 1 hour. Other steps and parameter are identical with embodiment 1. The fiber pellets prepared in this way have excellent flame retardancy. The average diameter of the prepared fiber pellets is 20mm, the apparent color is black, and the apparent density is 0.8g / cm 3 , The thickness of the composite material layer is about 2mm, and the hydrostatic pressure resistance is 160MPa. Compared with Example 1, the low compressive strength is mainly due to the fact that the resin used is phenolic resin, and compared with epoxy resin, the mechanical properties of phenolic resin are poor.

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Abstract

The invention discloses small fiber balls for a solid buoyancy material and a preparation method of the small fiber balls. The small fiber balls have nuclear shell structures, nucleating carriers are foam balls, and shell layers are powdery fiber reinforced resin matrix composite layers; the small fiber balls with the nuclear shell structures are prepared by adopting the expandable polystyrene foam balls as the nucleating carriers, uniformly coating the surfaces of the expandable polystyrene foam balls with powdery fiber reinforced resin systems, solidifying and washing. The physical performance of the small fiber balls can be conveniently and effectively controlled and improved by changing the foam diameter, the fiber and resin type and the coating thickness according to different environmental usage requirements.

Description

technical field [0001] The invention relates to a fiber pellet used for solid buoyancy materials and a preparation method thereof, in particular to a counterweight for equipment in water, water surface buoys, deep-sea exploration, and deep-sea oil and gas field development platforms applicable to water depths up to 3,000 meters and above A fiber pellet of solid buoyancy material used in a buoyancy platform and a preparation method thereof. Background technique [0002] Solid buoyancy material is a high-performance composite material with low density, high strength, low water absorption and high buoyancy. It is an indispensable basic material for modern offshore oil, natural gas and deep diving technology. It can provide buoyancy for platform devices on the water surface , provide thermal insulation and buoyancy for underwater pipelines, provide necessary buoyancy for deep-diving equipment, and play an important role in increasing the payload of the submersible, reducing its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L63/00C08K7/06C08K3/04B29B9/14
Inventor 郭金海郝旭峰李涛居建国诸静叶周军
Owner SHANGHAI COMPOSITES SCI & TECH CO LTD
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