A preparation method of multi-scale micro-nano particle interlayer toughened composite material

A technology of toughening composite materials and micro-nano particles, which is applied in the field of composite materials, can solve problems such as thermal properties, other mechanical properties, unfavorable RTM molding, etc., and achieve low cost, no loss of thermal properties, and simple modification principles.

Active Publication Date: 2018-02-09
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Interlayer toughening is an effective method to improve the interlayer fracture toughness of composite materials. Traditional interlayer toughening methods mostly use thermoplastic films and thermoplastic particles. Such processes are not conducive to RTM molding, and the thermal properties of the final product, other Mechanical properties, etc. are affected
The modified interlayer toughening of multi-scale inorganic particles can not only meet the requirements of RTM molding process, but also realize interlayer fracture by using different toughening mechanisms of different scale particles under the premise of maintaining thermal properties and other mechanical properties. Substantial improvement in toughness, this new method for interlayer toughened composites of multi-scale particles suitable for RTM molding has not been reported so far

Method used

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  • A preparation method of multi-scale micro-nano particle interlayer toughened composite material
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  • A preparation method of multi-scale micro-nano particle interlayer toughened composite material

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Embodiment 1

[0038] A method for preparing a multi-scale micro-nano particle interlayer toughened composite material, the steps of which are:

[0039] 1) Mix ethanol and water uniformly at 9:1 (volume ratio), add acetic acid dropwise to the mixed solution, adjust the pH value to 6, add quantitative KH-550, prepare a solution with a KH550 content of 1 wt%, and make The solution was hydrolyzed at 25°C for 90 minutes; then 1um and 3nm Al were added to the solution 2 o 3 , magnetically stirred at 25°C for 90 minutes, suction filtered, dried, ground, and sieved before use.

[0040] 2) The modified 1um and 3nm Al 2 o 3 Add it into distilled water according to the mass ratio of 3:1, ultrasonically disperse it for 15 minutes, and then spray it evenly on the surface of carbon fiber cloth, and control the surface density of the particles to 5g / m 2 ; Dry the sprayed fiber cloth at 110°C for 5 minutes and then cool to room temperature.

[0041] 3) Clean the mold, apply the release agent and lay t...

Embodiment 2

[0045] A method for preparing a multi-scale micro-nano particle interlayer toughened composite material, the steps of which are:

[0046] 1) Mix ethanol and water evenly at a ratio of 1:9 (volume ratio), add acetic acid dropwise to the mixed solution, adjust the pH value to 1, add a quantitative amount of coupling agent KH-560, and prepare a solution with a KH560 content of 15wt% , and the solution was hydrolyzed at 90°C for 10 minutes; then 30um and 30nm Al were added to the solution 2 o 3 , magnetically stirred at 70° C. for 10 min, suction filtered, dried, ground, and sieved before use.

[0047] 2) The modified 30um and 30nm Al 2 o 3 , added to distilled water according to the mass ratio of 1:3, ultrasonically dispersed for 90 minutes, and then evenly sprayed on the surface of carbon fiber cloth, and the surface density of the particles was controlled to be 50g / m 2 ; Dry the sprayed fiber cloth at 25°C for 2h and then cool to room temperature.

[0048] 3) Clean the mol...

Embodiment 3

[0050] A method for preparing a multi-scale micro-nano particle interlayer toughened composite material, the steps of which are:

[0051] 1) Mix ethanol and water evenly at 8:2 (volume ratio), add acetic acid dropwise to the mixed solution, adjust the pH value to 3, add quantitative coupling agent KH-560, and prepare a solution with a KH560 content of 10wt%. , and the solution was hydrolyzed at 45°C for 50min; then 10um and 10nm Al were added to the solution 2 o 3 , magnetically stirred at 45° C. for 50 min, suction filtered, dried, ground, and sieved before use.

[0052] 2) The modified 10um and 10nm Al 2 o 3 Add it into distilled water at a mass ratio of 1:1, ultrasonically disperse it for 60 minutes, and then spray it evenly on the surface of carbon fiber cloth to control the surface density of the particles to 15g / m 2 ; Dry the sprayed fiber cloth at 60°C for 1 hour and then cool to room temperature.

[0053] 3) Clean the mold, apply the release agent and lay the laye...

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Abstract

The invention relates to the field of composite materials, in particular to a method for preparing a multi-scale interlayer toughened composite material of micro-nano particles. Modified micro-particles and nanoparticles exist in the interlayer of the composite material at the same time to synergistically toughen the composite material. Compared with the prior art, the beneficial effect of the present invention is that the viscosity of the matrix resin does not change, which meets the requirement of low viscosity of the resin in the RTM molding process, and at the same time, the modified particles can achieve high strength with the fiber through chemical crosslinking Bonding: The principle of raw material modification is simple, the process is mature, and the final composite material has the characteristics of no loss of thermal properties, excellent mechanical properties, and greatly improved interlayer fracture toughness, which can meet the needs of modern industries for high-performance composite materials. The preparation method of the invention has the advantages of simplicity, environmental protection, low cost and the like, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a multi-scale micro-nano particle interlayer toughened composite material. Background technique [0002] Composite materials have been widely used in many fields due to their light weight, high strength, and corrosion resistance, especially in the fields of aviation and aerospace. Among them, the largest and most important composite materials are fiber-reinforced thermosetting resin-based composite materials for structures. . However, as a commonly used structural component, the poor interlaminar fracture toughness of composite materials has been the main factor hindering its development. Therefore, the improvement of interlaminar fracture toughness of composite materials has become the focus of common attention in both academia and industry. [0003] In fiber-reinforced thermosetting resin-based composites, the fibers are reinforced along the x and y d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L61/06C08L77/06C08L71/12C08K13/06C08K9/06C08K3/22C08K7/06C08K7/14C08K3/04C08K3/34C08K3/36C08K7/12C08K7/10
Inventor 赵贵哲王智杜瑞奎张彦飞刘亚青白龙斌
Owner ZHONGBEI UNIV
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