Modified phenolic resin, composite material, and preparation methods of modified phenolic resin and composite material

A technology of phenolic resin and composite materials, which is applied in the field of composite materials, can solve problems affecting the molding process and mechanical properties, and achieve the effects of eliminating free air layers, uniform expansion coefficient, and reducing thermal conductivity resistance

Inactive Publication Date: 2019-05-14
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat insulation effect can be improved by adding thermal insulation fillers (such as glass hollow microspheres, etc.) to the phenolic resin, but if the

Method used

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  • Modified phenolic resin, composite material, and preparation methods of modified phenolic resin and composite material
  • Modified phenolic resin, composite material, and preparation methods of modified phenolic resin and composite material
  • Modified phenolic resin, composite material, and preparation methods of modified phenolic resin and composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Modified phenolic resin ratio (mass ratio)

[0069]

[0070] The preparation method is as follows:

[0071] 1) Blending treatment of ceramic hollow microspheres

[0072] The opal shale ore is crushed, pulverized, ground and separated to produce opal masterbatches with a diameter of about 100um (ceramic hollow microspheres are generally 10-30um in diameter), and the opal masterbatches are dried at 120°C for 2 hours , the dried opal masterbatch and ceramic hollow microspheres were mixed in a high-speed mixer for 2 hours to make them uniform, and after standing for 30 minutes to cool, the ceramic hollow microspheres were sieved from the mixture.

[0073] 2) Fabric preparation

[0074] Select 85tex C-type quartz glass fiber, spiral curly phenolic fiber 20S / 3, and aramid fiber-Kevlar K49 to weave according to the quantity ratio (number ratio) of 1:1:1, and the warp and weft density of the woven yarn: 9 root / cm, area density 150g / ㎡.

[0075] 3) Preparation of modified ...

Embodiment 2

[0081] Except fabric, other proportioning and step are with embodiment 1, and the specific performance of the test sample of this example is shown in Table 1.

[0082] Fiber fabric:

[0083] Select 85tex C-type quartz glass fiber and spiral curly phenolic fiber 20S / 3 for weaving according to the quantity ratio (number ratio) of 5:4. The warp and weft density of the weaving yarn is 9 threads / cm, and the surface density is 150g / ㎡.

[0084] Table 1

[0085]

[0086]

[0087] It can be seen from Table 1 that the use of different fabrics has little effect on the thermophysical properties of the composite material, but the addition of aramid fiber to the fabric can improve the mechanical properties of the composite material such as tensile strength, and the addition of aramid fiber can also greatly improve the mechanical properties of the composite material. It is good to improve the interlayer performance of the product.

Embodiment 3、4

[0089] Heat reflective material (TiO2) in embodiment 3,4 2 ) addition number of parts is 3 and 16, and other is with embodiment 1, and the specific performance of the test sample that obtains is shown in Table 2.

[0090] Table 2

[0091]

[0092] It can be seen from Table 2 that the addition of heat reflective substances can effectively improve the thermophysical properties of composite materials, and the optimal mass ratio of phenolic resin to heat reflective substances is around 100:8.

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Abstract

The invention provides modified phenolic resin, a composite material, and preparation methods of the modified phenolic resin and the composite material. The modified phenolic resin comprises phenolicresin, chopped fibers, hollow microbeads and heat reflecting materials, and the hollow microbeads include hollow phenolic microbeads and hollow ceramic microbeads. The modified phenolic resin has theadvantages of non-ablative surface radiation and low thermal conduction, and ablative cracking heat desorption and mass ejection due to the special formula design; through blending of the hollow ceramic microbeads and inorganic masterbatches, the thermal insulation of the modified phenolic resin is enhanced, and the radiation resistance of the surfaces of ablative materials is improved.

Description

technical field [0001] The invention relates to a modified phenolic resin, a composite material and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] A hypersonic vehicle needs to fly at a high Mach number for a long time, and its surface needs to withstand very high temperatures and very large airflow impacts. In order to ensure the normal operation of the components in the vehicle, a thermal protection system needs to be used on its surface. The thermal protection system is a key subsystem to protect the aircraft from burning or overheating in a high-temperature environment. Existing thermal protection systems and materials mainly include non-ablative and ablative. Non-ablative thermal protection material protection principle: surface radiation; low thermal conductivity materials hinder convective heat transfer, solid heat transfer, etc. Protection principle of ablative thermal protection material: pyroly...

Claims

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Application Information

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IPC IPC(8): C08L61/06C08K7/10C08K7/24C08K3/22C08L71/10C08K13/04C08K7/14C08J5/24
Inventor 谢永旺夏雨许孔力许学伟王文宾
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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