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Fiber reinforced composite material and preparation thereof

A composite material and fiber-reinforced technology, applied in the field of composite materials, can solve the problems of electromagnetic shielding effect degradation and hindering electromagnetic shielding effect

Inactive Publication Date: 2009-04-15
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the amount of conductive filler added is limited by the molding and processing requirements of the material and its mechanical strength. The lower limit of the volume resistivity of the existing metal fiber reinforced thermoplastic polymer products is 0.1Ω·cm, which hinders the further improvement of the electromagnetic shielding effect.
In addition, with the passage of time, the metal surface is oxidized, and the electromagnetic shielding effect is continuously degraded

Method used

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  • Fiber reinforced composite material and preparation thereof
  • Fiber reinforced composite material and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The acrylonitrile-butadiene-styrene copolymer was melt-extruded at 220°C in a single-screw extruder equipped with a right-angle head at the head position, and a continuous copper fiber bundle with a diameter of 30 μm passed through the right-angle head along the direction perpendicular to the extruder. Traction in the outgoing direction, after water-cooled drying and pelletizing, obtain the master batch containing 85wt% copper fiber content, then acrylonitrile-butadiene-styrene copolymer, the above-mentioned copper fiber master batch and particle diameter are tin-lead alloy powder ( The lead content is 35wt%, and the melting point is 183°C). After weighing according to the weight ratio of 74 / 20 / 6, it is added to a twin-screw extruder and melted and extruded at 220°C. After the extruded product is pelletized and dried, it is injection molded at 230°C . The volume resistivity of the obtained material is 8.36×10 -1 ohm.cm.

Embodiment 2

[0035] Acrylonitrile-butadiene-styrene copolymer, copper fiber with a diameter of 30 μm and tin-lead alloy powder with an average diameter of 35 μm (lead content 35wt%, melting point is 183 ° C) were weighed according to the mass ratio 61 / 11 / 28 After that, it is added to a twin-screw extruder and melted and extruded at 220°C. After the extrudate is pelletized and dried, it is injection molded at 230°C. The volume resistivity of the obtained material is 4.55×10 -2 ohm.cm.

Embodiment 3

[0037] With the method of Example 1, 85 wt% copper fiber reinforced polypropylene masterbatch was prepared at 220°C. Then polypropylene, masterbatch and tin-copper alloy powder (copper content 0.7wt%, fusing point 227 ℃) with particle diameter of 35 μm are prepared composite material with embodiment 1 by weight ratio 64 / 30 / 6, and wherein extruding temperature is 220 °C, and the injection temperature is 240 °C. The volume resistivity of the obtained material is 6.35×10 -2 ohm.cm.

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Abstract

The invention discloses a fiber reinforced composite material and a preparation method thereof. The fiber reinforced composite material comprises polymeric matrix and fibers and also comprises a solder which leads the fibers which are dispersed in the polymeric matrix to connect together so as to essentially form a three-dimensional network skeleton structure which is formed by the solder and the fibers and is independent in the polymeric matrix. The fiber reinforced composite material can use the fiber characteristics effectively, reduces the fiber usage, supplies higher heat resistance, electric conductivity or heat conductivity and has wide application prospect in the fields of transportation, electronic information and residential construction and the like.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a class of fiber-reinforced composite materials and a preparation method thereof. Background technique [0002] A composite material is a material composed of one material as a matrix and another material as a reinforcement. Various materials learn from each other in terms of performance and produce synergistic effects, so that the comprehensive performance of the composite material is better than that of the original constituent materials to meet various requirements. [0003] Among composite materials, fiber reinforced materials are the most widely used and used in the largest amount. Fiber-reinforced composite materials are made by placing various fiber reinforcements in a matrix material. Fiber-reinforced polymer composites have become ideal materials to replace metals due to their light weight, high strength, corrosion resistance, and easy processing. They have been wide...

Claims

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Application Information

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IPC IPC(8): C08L101/00C08K7/02C08J5/04C08J3/22B29B7/00B29B9/14B29B9/06
Inventor 吴国章李兵朋宋加坤
Owner EAST CHINA UNIV OF SCI & TECH
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