Structural flame-retardant functional composite material and preparation method thereof

A composite material and structural flame retardant technology, which is applied in the field of materials science and can solve the problems of damage to the interface structure of composite materials and mechanical decline.

Active Publication Date: 2020-12-01
NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent application does not mention whether placing flame-retardant particles between the fiber ...

Method used

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  • Structural flame-retardant functional composite material and preparation method thereof
  • Structural flame-retardant functional composite material and preparation method thereof
  • Structural flame-retardant functional composite material and preparation method thereof

Examples

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preparation example Construction

[0072] (3) Preparation of flame retardant structural material prepreg form

[0073] The flame-retardant structural material is a pure dry fiber mat. In the preparation of composite materials, it can be infiltrated with resin together with the reinforcements (fibers or particles) that are also in a dry state. It is suitable for traditional liquid molding processes (including resin transfer molding). RTM, vacuum induction technology). However, with the development of autoclave technology, prepregs made of fiber-reinforced resin prepregs have been widely used. Since the fiber reinforcement is already proportioned with the resin, the preparation does not require resin injection.

[0074] Therefore, the present invention proposes the form of a flame-retardant structure fiber mat prepreg. Through the fiber mat pre-impregnation process, the flame-retardant structure material is pre-impregnated with resin to make a flame-retardant structure material prepreg, which can not only be use...

Embodiment 2

[0120] Flame retardant structural material M2: disperse expanded graphite (60 parts), glass fiber (10 parts), mineral fiber (10 parts) and polyester (20 parts) in an aqueous solution, and stir at a uniform speed for 8 hours to obtain a uniformly dispersed suspension , after filtration through a screen, a fiber felt with a surface weight of 150g / ㎡ and a thickness of 0.5mm containing expanded graphite was obtained, which was dried in an oven at 60°C for 1 to 3 hours, and then cured at a temperature of 80°C to obtain flame retardant fiber mat. Then, the flame-retardant fiber mat is impregnated with epoxy resin through resin impregnation equipment to prepare a prepreg with a resin weight percentage of 50%, which is used for composite material preparation.

[0121] Composite material C2: as in Example 1, carbon fiber reinforced epoxy prepreg (resin weight percentage 50%) is used, and the flame retardant fiber mat is used as the surface layer of the composite material, and is placed...

Embodiment 3

[0126] Flame-retardant structural material M2: the material formula and preparation method are the same as those in the second embodiment

[0127] Composite material C3: use carbon fiber reinforced flame retardant epoxy prepreg (resin weight percentage of 50%), use flame retardant fiber felt as the surface layer of the composite material, and place it on the upper and lower surfaces of the prepreg as a whole. Tank forming process, forming at 120°C under vacuum pressure of 0.8bar. The flame-retardant fiber felt and the carbon fiber are combined by resin curing to become the protective layer on the upper and lower surfaces of the composite material. The material performance comparison is shown in Table 3. It can be seen that the M2 flame retardant material can effectively improve the flame retardant performance of the material. By comparing the requirements of the EN45545 standard, the composite material C3 has partially met the standard requirements and can be used for rail tr...

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Abstract

The invention provides a structural flame-retardant functional composite material which comprises a flame-retardant fireproof fiber felt and a composite material, and the surface of the composite material body is coated with the flame-retardant fireproof fiber felt. The invention further provides a preparation method of the structural flame-retardant functional composite material. The preparationmethod comprises the following steps: (1) preparing the flame-retardant fireproof fiber felt; (2) pre-impregnating the fiber felt; and (3) preparing the flame-retardant composite material. Compared with the prior art, a surface flame-retardant structure is adopted, the flame-retardant functional structure layer with the functions of flame retardance, heat insulation, smoke suppression and the likeis concentrated on the surface of the composite material based on the combustion behavior that the composite material expands from outside to inside after being ignited, and in the process that the composite material is on fire, the structure can be used as a fireproofing suit to isolate flame and heat outside the composite material so that the internal structure of the material is protected, andthe damage of a flame retardant to the composite material matrix is avoided.

Description

technical field [0001] The invention relates to the field of material science, in particular to a structural flame-retardant functional composite material and a preparation method thereof. Background technique [0002] Resin-based composite materials have the advantages of light weight, high strength, convenient processing and molding, and good chemical corrosion resistance, and have been widely used in aerospace, automotive, electrical and electronic, construction, fitness equipment and other fields. Since the resin matrix of the composite material is a high molecular polymer, it will be decomposed by thermal combustion at high temperature or in a flame. For example, when it is used as an interior material in transportation fields such as airplanes and high-speed trains, the volatile gases released during the combustion process will be released. , toxic fumes and flames will cause direct harm to passengers. At the same time, the mechanical properties of resin-based composi...

Claims

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Application Information

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IPC IPC(8): B32B5/02B32B27/00B32B27/12B32B37/06B32B37/10B32B33/00C08L63/00C08L67/00C08K7/24C08K7/14C08K7/04C08K7/06C08J5/24
CPCB32B5/02B32B27/00B32B27/12B32B37/06B32B37/10B32B33/00C08J5/24C08J2363/00C08J2467/00C08K7/24C08K7/14C08K7/04C08K7/06
Inventor 刘晓玲朱晨凯从小晔
Owner NINGBO NOTTINGHAM NEW MATERIALS INST CO LTD
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