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High-toughness epoxy-based composite buoyancy material and preparation method thereof

A buoyant material and epoxy-based technology, which is applied in the field of high-toughness epoxy-based composite buoyancy materials and their preparation, can solve problems such as uneven dispersion and decreased material compressive strength, and achieve improved compatibility and high compressive strength. , the preparation process is simple and convenient

Inactive Publication Date: 2021-08-24
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of uneven dispersion of traditional tougheners in the buoyancy material, resulting in a decrease in the compressive strength of the material, the present invention provides a high-toughness epoxy-based composite buoyancy material and its preparation method, by using carboxyl-terminated polyvinyl alcohol shrinkage Formaldehyde copolymerized acrylic acid modified epoxy resin, using its carboxylic acid group to cross-link with epoxy resin, effectively improving the compatibility of the two; at the same time, the modified epoxy resin is firmly attached to each other through the hydrogen bonds of each polar unit On the hollow glass microspheres and carbon nanotubes, the overall impact resistance of the buoyancy material is improved without reducing the compressive strength of the material

Method used

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  • High-toughness epoxy-based composite buoyancy material and preparation method thereof
  • High-toughness epoxy-based composite buoyancy material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0025] (1) Stir 100 parts of epoxy resin E44 and 7 parts of carboxyl-terminated polyvinyl formal copolymerized acrylic acid (VINYLEC) toughening agent at 130-140°C for 3-4 hours to dissolve them completely, and Carry out vacuum defoaming treatment. Add 30 parts of polyetheramine curing agent D230, 1.5 parts of 2-ethyl-4-methylimidazole accelerator and stir in vacuum at a certain temperature for 20 minutes to obtain a mixed epoxy resin liquid for use;

[0026] (2) Hollow glass microspheres with a particle size D50 of 65um (true density 0.25g / cm 3 , compressive strength of 5MPa) and hollow glass microspheres with a particle size D50 of 35um (true density 0.6 g / cm 3 , the compressive strength is 125MPa) After mixing evenly according to the mass ratio of 4:1, add it to the liquid in the mixed epoxy resin, and stir in vacuum at 70°C for 20min;

[0027] (3) Inject the premixed material in step (2) into the mold, then vacuumize at 80°C, stand at room temperature for 3-4 hours for d...

Embodiment 2

[0030] (1) Stir 100 parts of epoxy resin E54 and 8 parts of carboxyl-terminated polyvinyl formal copolymerized acrylic acid (VINYLEC) toughening agent at 130-140°C for 3-4 hours to completely dissolve it, and Carry out vacuum defoaming treatment. Add 90 parts of methyl hexahydrophthalic anhydride curing agent and 2 parts of 2,4,6-tris(dimethylaminomethyl)phenol accelerator and stir in vacuum at a certain temperature for 20 minutes to obtain a mixed epoxy resin liquid for use;

[0031] (2) Hollow glass microspheres with a particle size D50 of 60um (true density 0.25g / cm 3 , the compressive strength is 5.18MPa) and hollow glass microspheres with particle diameter D50 of 20um (true density 0.46 g / cm 3 , compressive strength is 110MPa) After mixing evenly according to the mass ratio of 1:1, add KH560 ethanol aqueous solution with 3% mass of hollow glass microspheres for surface pretreatment, reflux at 80°C for 2h, suction filtration, drying, and 200 mesh filtration cloth sieve; ...

Embodiment 3

[0036](1) Stir 100 parts of epoxy resin E51 and 8 parts of carboxyl-terminated polyvinyl formal copolymerized acrylic acid (VINYLEC) toughening agent at 130-140°C for 3-4 hours to dissolve them completely, and Carry out vacuum defoaming treatment. Add 85 parts of methyltetrahydrophthalic anhydride curing agent and 2 parts of 2-ethyl-4-methylimidazole accelerator and stir in vacuum at a certain temperature for 20 minutes to obtain a mixed epoxy resin liquid for use;

[0037] (2) Hollow glass microspheres with a particle size D50 of 55um (true density 0.25g / cm 3 , compressive strength of 5.17MPa) and hollow glass microspheres with a particle size D50 of 20um (true density 0.46 g / cm 3 , compressive strength is 110MPa) After mixing evenly according to the mass ratio of 1:1, add KH550 ethanol aqueous solution with 3% mass of hollow glass microspheres for surface pretreatment, reflux at 80°C for 2h, suction filtration, drying, and 200 mesh filtration cloth sieve;

[0038] (3) Add...

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Abstract

The invention discloses a high-toughness epoxy-based composite buoyancy material and a preparation method thereof. The preparation method comprises the following steps of directly heating and melting polyvinyl formal copolymerized acrylic acid and epoxy resin to obtain modified epoxy resin, and mixing the modified epoxy resin with carbon nanotubes and hollow glass beads, and improving the compatibility of the hollow glass beads, the carbon nanotubes and the epoxy resin by utilizing the hydrogen-bond interaction of polar groups of polyvinyl formal copolymerized acrylic acid and amino groups and hydroxyl groups on the surfaces of the carbon nanotubes and the hollow glass beads. the preparation process is simple, convenient and suitable for industrial production, and the prepared buoyancy material is high in compressive strength, good in impact toughness and low in water absorption rate.

Description

technical field [0001] The invention belongs to the field of solid buoyancy materials for marine equipment, and in particular relates to a high-toughness epoxy-based composite buoyancy material and a preparation method thereof. Background technique [0002] The development and management of marine resources has always been the focus of international attention. With the further development of marine resources, the marine environment faced by people is becoming more and more complex, which puts forward higher requirements for buoyant materials. Solid buoyancy materials are also called composite foam materials, which are made by adding hollow microspheres to the resin matrix. They have comprehensive characteristics such as low density, high strength, low water absorption, and corrosion resistance. They are widely used in marine exploration systems, deep-sea diving, etc. equipment, offshore oil exploration and other deep sea development equipment. However, most of the high-stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L29/14C08K7/28
CPCC08L63/00C08K2201/014C08K2201/003C08L29/14C08K7/28
Inventor 萨百晟曾继红许超温翠莲何铠君
Owner FUZHOU UNIV
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