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Layered inorganic nano-material-modified benzoxazine resin, fiber-reinforced composite material of modified benzoxazine resin and preparation method

A technology of inorganic nanomaterials and inorganic nanofillers, which is applied in the field of fiber-reinforced benzoxazine resin-based composite materials and its preparation, can solve the problems of high curing temperature and further improvement of heat resistance, and achieve lower curing temperature and excellent barrier properties. Performance, the effect of improving the carbon residue rate

Inactive Publication Date: 2018-06-05
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the curing temperature of benzoxazine monomer is relatively high, usually higher than 200°C, and its heat resistance needs to be further improved.

Method used

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  • Layered inorganic nano-material-modified benzoxazine resin, fiber-reinforced composite material of modified benzoxazine resin and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0020] (1) the acetone suspension (m 填料 =7.5g, V 溶剂 =250ml) is placed in the there-necked flask, then adds the acetone solution of benzoxazine monomer or / and benzoxazine prepolymer (m 苯并噁嗪 =250g, V 溶剂 = 100ml). First, the mixed system was magnetically stirred at room temperature and normal pressure for 24 hours, then mechanically stirred at 60°C and normal pressure for 10 hours, and finally most of the acetone in the mixed system was removed by heating to reflux;

[0021] (2) Transfer the above mixture system to a metal tray, then place it in a vacuum drying oven, and dry it in vacuum at 60°C for 60 hours (grinding once every 4 hours) to obtain benzoxazine monomer or / and benzo Mixture powder of oxazine prepolymer and organic modified nano filler;

[0022] (3) Take 30g of the mixture powder prepared in step (2), divide it into 5 parts and add it to a stainless steel mold with an inner size of 127mm*12.7mm*6mm, heat and solidify (190°C for 1h+210°C for 2h+230°C 2h+250°C 1h)...

Embodiment example 2

[0025] (1) the acetone suspension (m 填料 = 15g, V 溶剂 =250ml) is placed in the there-necked flask, then adds the acetone solution of benzoxazine monomer or / and benzoxazine prepolymer (m 苯并噁嗪 =250g,V 溶剂 = 100ml). First, the mixed system was magnetically stirred at room temperature and normal pressure for 30 hours, then mechanically stirred at 80°C and normal pressure for 10 hours, and finally most of the acetone in the mixed system was removed by heating to reflux;

[0026] (2) Transfer the above mixture system to a metal tray, then place it in a vacuum drying oven, and dry it in vacuum at 50°C for 70 hours (grind once every 4 hours) to obtain benzoxazine monomer or / and benzo Mixture powder of oxazine prepolymer and organic modified nano filler;

[0027] (3) Take 30g of the mixture powder prepared in step (2), divide it into 5 parts and add it to a stainless steel mold with an inner size of 127mm*12.7mm*6mm, heat and solidify (190°C for 1h+210°C for 2h+230°C 2h+250°C 1h), to...

Embodiment example 3

[0030] (1) the acetone suspension (m 填料 =25g,V 溶剂 =250ml) is placed in the there-necked flask, then adds the acetone solution of benzoxazine monomer or / and benzoxazine prepolymer (m 苯并噁嗪 =250g, V溶剂 = 100ml). First, the mixed system was magnetically stirred at room temperature and normal pressure for 24 hours, then mechanically stirred at 80°C and normal pressure for 10 hours, and finally most of the acetone in the mixed system was removed by heating to reflux;

[0031] (2) Transfer the above mixture system to a metal tray, then place it in a vacuum drying oven, and dry it in vacuum at 60°C for 50 hours (grinding once every 4 hours), to obtain benzoxazine monomer or / and benzo Mixture powder of oxazine prepolymer and organic modified nano filler;

[0032] (3) Take 30g of the mixture powder prepared in step (2), divide it into 5 parts and add it to a stainless steel mold with an inner size of 127mm*12.7mm*6mm, heat and solidify (190°C for 1h+210°C for 2h+230°C 2h+250°C 1h), t...

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Abstract

The invention relates to a novel layered inorganic nano-material-modified benzoxazine resin, a fiber-reinforced benzoxazine resin base composite material which is obtained by compounding the modifiedbenzoxazine resin with glass fiber or carbon fiber and a preparation method. The layered inorganic nano-material-modified benzoxazine resin is prepared by curing a mixture of benzoxazine monomers or / and benzoxazine prepolymers and organically modified layered inorganic nano filler at 180-260 DEG C. Glass fiber or carbon fiber is soaked in the uncured modified benzoxazine resin mixture which is ina solution state or molten state, and the fiber-reinforced benzoxazine resin base composite material is obtained through a hot pressing process. The layered inorganic nano-material-modified benzoxazine resin and fiber-reinforced benzoxazine resin base composite material have excellent gas / liquid barrier performance, solvent resistance, heat insulation, flame retardation, ablation resistance, mechanical properties and the like, and can be widely applied to aviation, aerospace and other fields.

Description

technical field [0001] The invention relates to a novel inorganic layered nanomaterial modified benzoxazine resin and a preparation method thereof, in particular to a benzoxazine monomer or / and prepolymer and an organically modified layered inorganic nano filler Modified benzoxazine resin obtained by blending and curing and fiber reinforced benzoxazine resin-based composite material obtained by compounding with glass fiber or carbon fiber and a preparation method thereof. Background technique [0002] Benzoxazine resin is a new type of high-performance phenolic resin, which can be obtained from the reaction of phenols, aldehydes and amines. It can be cured only under heating conditions, and no by-products are released during the curing process. Curing shrinkage. The cured product of benzoxazine has excellent mechanical properties, gas barrier properties, heat resistance, flame retardancy and dimensional stability. Therefore, benzoxazine has received extensive attention in r...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08K9/04C08K3/34C08K3/04C08K7/06C08K7/14
CPCC08K3/04C08K3/34C08K3/346C08K7/06C08K7/14C08K9/04C08K9/08C08K2201/011C08L2201/02C08L2201/08C08L2201/14C08L79/04
Inventor 王小群王新媛张栩
Owner BEIHANG UNIV
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