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Preparation method of rigid nanoparticle interlayer modified liquid-state molded composite material

A nanoparticle and composite material technology, used in textiles, papermaking, fiber processing, etc., can solve problems such as increasing the viscosity of RTM resin matrix, and achieve the effects of inhibiting crack propagation, improving compressive strength after impact, and improving fracture toughness.

Active Publication Date: 2013-06-05
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the RTM molding process, the addition of nanoparticles will greatly increase the viscosity of the RTM resin matrix, which is contradictory to the requirement for low viscosity of the RTM resin. Therefore, how to separate the rigid nanoparticles from the resin matrix and directly introduce the composite The interlaminar region where the material is weakest presents a technical difficulty in using rigid inorganic nanoparticles to modify liquid formable composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Choose a typical aviation medium temperature curing RTM epoxy resin as the matrix resin, rigid inorganic CaCO 3 The addition amount of nanoparticles is 25%wt.

[0030] Rigid Inorganic CaCO 3 The particles and the epoxy resin matrix were first pre-mixed on a high-speed stirring ball mill for 1 hour, and the pre-mixed modified resin was re-mixed on a pressure-mode three-roll mill. Add the weighed modified resin into the reaction vessel and stir it mechanically. And raise the temperature to 70±2°C at a heating rate of 2°C / min, pre-polymerize for 20 minutes, and the reaction is completed. The reacted material was rapidly cooled to room temperature. After the material is sufficiently cooled to be solid, it is pre-pulverized with a mortar, and then crushed into a powder of 50-100 mesh in a freeze pulverizer again to obtain the interlayer modifier.

[0031]Spread the obtained interlayer modifier evenly on the surface of the glass fiber fabric (SW280) through a mechanical v...

Embodiment 2

[0035] Choose a typical aviation RTM bismaleimide resin as the matrix resin, rigid inorganic SiO 2 The addition amount of nanoparticles is 20%wt.

[0036] Rigid inorganic nano-SiO 2 The particles and the bismaleimide resin matrix were first premixed on a high-speed stirring ball mill for 1 hour, and the premixed modified resin was remixed on a pressure-mode three-roller mill. Add the weighed modified resin into the reaction vessel and stir it mechanically. And raise the temperature to 130±2°C at a heating rate of 2°C / min, pre-polymerize for 20 minutes, and the reaction is completed. The reacted material was rapidly cooled to room temperature. After the material is sufficiently cooled to be solid, it is pre-crushed with a mortar, and then crushed into a powder of 50-100 mesh in a jet mill again to obtain the interlayer modifier.

[0037] Spread the obtained interlayer modifier evenly on the surface of T-700 unidirectional laid fabric (U-7192D) through a mechanical vibrating...

Embodiment 3

[0041] Choose a typical aviation high-temperature curing RTM epoxy resin as the matrix resin, rigid inorganic Al 2 o 3 The addition amount of nanoparticles is 30%wt.

[0042] Rigid Inorganic Nano Al 2 o 3 The particles and the epoxy resin matrix were first pre-mixed on a high-speed stirring ball mill for 2 hours, and the pre-mixed modified resin was re-mixed on a pressure-mode three-roll mill. Add the weighed modified resin into the reaction vessel and stir it mechanically. And the temperature was raised to 130±2°C at a heating rate of 2°C / min, and the prepolymerization was performed for 30 minutes, and the reaction was completed. The reacted material was rapidly cooled to room temperature. After the material is sufficiently cooled to be solid, it is pre-crushed with a mortar, and then crushed into a powder of 50-100 mesh in a high-speed ball mill to obtain an interlayer modifier. When crushing in a ball mill, a certain amount of analytically pure anhydrous ethanol shoul...

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Abstract

The invention belongs to the technical field of liquid-state molded composite material manufacturing, and relates to a preparation method of an inorganic rigid nanoparticle interlayer modified liquid-state molded composite material. The invention prepares a liquid-state molded composite material interlayer modifier by mixing inorganic rigid nanoparticles and substrate resin, and no surface treatment is needed. According to the invention, the interlayer modifier is directly adhered to a surface of a continuous fabric surface by the bonding effect of a coating layer of the substrate resin, and thus the scouring effect of the flowing of the resin on interlayer rigid nanoparticles during the liquid-state molding process is prevented; nanoparticles are directly introduced into a weak interlayer part of the composite material, which effectively prevents the extension of interlayer cracks of the composite material, and thus improves the interlayer performance of the composite material. Additionally, the added rigid inorganic nanoparticles do not participate the chemical reaction of the original resin substrate; no chemical dosage ratio is involved; and the process properties of the RTM resin system and the heat resistance of the composite material are not influenced.

Description

technical field [0001] The invention belongs to the technical field of manufacturing liquid forming composite materials, and relates to a preparation method of inorganic rigid nano particle interlayer modified liquid forming composite materials. Background technique [0002] In recent years, composite material liquid molding technology represented by RTM (Resin Transfer Molding) molding technology has become the mainstream of low-cost manufacturing technology for aerospace composite material structures, especially the combination of RTM molding technology and composite composite structure overall manufacturing technology, For example, on the US F-22 aircraft, about 360 load-bearing structures accounting for about 45% of the weight of the non-skin composite structure were manufactured with RTM technology. Using RTM technology, the tolerance of structural products on F-22 is controlled within 0.5%, and the scrap rate is lower than 5%, which is 40% lighter and 10% cheaper than ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L79/08C08L79/06C08K7/00C08K7/14C08K7/06C08K9/10C08K3/26C08K3/36C08K3/22D06M15/55D06M15/59D06M15/37D06M11/76D06M11/79D06M11/45D06M11/46D06M11/44D06M23/16
Inventor 刘刚张代军张尧州张朋安学锋益小苏
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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