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A kind of three-dimensional fabric reinforced phenolic resin composite material and its preparation method

A technology of phenolic resin and three-dimensional fabric is applied in the field of three-dimensional fabric reinforced phenolic resin composite material and preparation, which can solve the problems of slow resin flow, low resin flow and mold filling efficiency, and scrapped components, so as to reduce pores, improve RTM molding efficiency, The effect of improving efficiency

Active Publication Date: 2020-12-25
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for large-thickness composite materials reinforced by three-dimensional braided fabrics, there are a large number of braided nodes of fibers, and the time for resin to penetrate these nodes is much longer than the time to flow between fiber bundles, resulting in slow resin flow during the RTM process of braided fabric components. In the preparation of large components, it is likely that the efficiency of resin flow and mold filling is too low, exceeding the pot life of RTM resin, resulting in the consequence of component scrapping

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of three-dimensional fabric reinforced phenolic resin composite material and its preparation method
  • A kind of three-dimensional fabric reinforced phenolic resin composite material and its preparation method
  • A kind of three-dimensional fabric reinforced phenolic resin composite material and its preparation method

Examples

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Effect test

Embodiment 1

[0045] A 30mm thick three-dimensional braided fabric reinforced flat structure is fabricated, and the flat size is 200×200mm. The specific preparation process is as figure 1 Shown:

[0046] 1. Design the injection channel

[0047] Such as figure 2 As shown, the thickness direction of the three-dimensional fabric is the glue injection direction, and the guide net is designed at the glue injection port, and the glue outlet is evenly designed on the non-working surface of the three-dimensional fabric.

[0048] 2. Design curing process

[0049] according to Figure 5 The schematic diagram of the rheological characteristic curve and the curing temperature of the phenolic resin (brand name FQ190 of the Institute of Chemistry) are shown, and the temperature T of the rapid rise period of the resin viscosity is determined. ns 100°C, curing temperature T gh 160°C, design 2 heat preservation and exhaust steps between 100°C and 160°C, respectively 120°C and 140°C, keep heat at 100°...

Embodiment 2

[0062] Make a 2.5D fabric reinforced leading edge structure 1500mm long with a section height of 80mm and a width of 65mm.

[0063] Concrete preparation process is as follows:

[0064] 1. Design the injection channel

[0065] Such as image 3 , 4 As shown, the thickness direction of the three-dimensional fabric is the glue injection direction, and a linear grid-like flow channel connected to it is set at the glue injection port, and the glue outlet is evenly designed on the non-working surface of the three-dimensional fabric.

[0066] 2. Design the curing process, such as Figure 6 shown.

[0067] 3. Weave the three-dimensional fabric and trim the shape.

[0068] 4. The three-dimensional fabric is loaded into the RTM mold

[0069] Put the trimmed fabric into the RTM mold, the thickness direction of the mold is the glue injection direction, and a glue injection port and a linear grid-shaped flow channel connected to it are set at the bottom of the mold (such as image 3 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a three-dimensional fabric reinforced phenolic resin composite and a preparation method. The three-dimensional fabric reinforced phenolic resin composite is prepared by adoptingan RTM process, stage insulation and exhaust are adopted in a solidification process, and an open mode is adopted at the resin solidification temperature Tgh. According to the three-dimensional fabric reinforced phenolic resin composite, the special curing system and flow channel design is adopted, so that the difficulties of air inclusion, high porosity and the like in the phenolic resin RTM process are overcome, the RTM forming efficiency of high-thickness corrosion-resistant members and the internal quality of workpieces can be effectively increased, and the key problem of the forming process is solved.

Description

technical field [0001] The invention relates to a three-dimensional fabric-reinforced phenolic resin composite material and a preparation method thereof, in particular to a three-dimensional fabric-reinforced phenolic resin composite material with a thickness exceeding 30 mm and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] As a thermosetting resin material with high crosslinking density, phenolic resin gradually carbonizes at high temperature to form a carbonized layer. The carbonized layer has high strength and strong heat resistance, and is suitable for extremely harsh environments such as high temperature, high pressure, and high-speed airflow. Ablative phenolic composites are widely used in the outer heat-resistant structure of high-speed aircraft or spacecraft. [0003] In order to ensure the surface protection effect of the aircraft in the ultra-high-speed flight state, the thickness of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/48B29C70/54B29C70/22
CPCB29C70/222B29C70/228B29C70/48B29C70/54
Inventor 田正刚夏雨王国勇范永富狄海啸朱八一
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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