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Self-healing microcapsule and preparation method thereof, self-healing basalt fiber and preparation method thereof

A technology of self-healing microcapsules and basalt fibers, applied in the field of materials

Active Publication Date: 2021-11-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention also provides a preparation method for self-repairing basalt fibers, which solves the technical problem of firmly loading self-repairing microcapsules on basalt fibers

Method used

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  • Self-healing microcapsule and preparation method thereof, self-healing basalt fiber and preparation method thereof
  • Self-healing microcapsule and preparation method thereof, self-healing basalt fiber and preparation method thereof
  • Self-healing microcapsule and preparation method thereof, self-healing basalt fiber and preparation method thereof

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preparation example Construction

[0045] The present invention also provides a preparation method for the self-healing microcapsules described in the above technical solution, comprising the following steps:

[0046] (1) urea, melamine and formaldehyde are mixed, carry out emulsification reaction, obtain prepolymer solution;

[0047] (2) Epoxy resin, diluent and emulsifier are mixed, carry out emulsification reaction and defoaming treatment successively, obtain core material emulsion;

[0048] (3) mixing the prepolymer solution with the core material emulsion, performing emulsification reaction and pH value adjustment treatment in turn to obtain liquid microcapsule particles; solidifying, filtering, washing and drying the liquid microcapsule particles in sequence Process to obtain monolayer microcapsules;

[0049] (4) providing a curing agent suspension containing a dispersant and a curing agent;

[0050] (5) mixing the curing agent suspension with the single-layer microcapsules, adjusting the pH value and h...

Embodiment 1

[0076] Put 5g of urea, 1g of melamine, and 13g of 37wt% formaldehyde aqueous solution into a 500mL three-neck flask with a condensing device in a mass ratio of 5:1:13, and stir for about 5min with a temperature-controlled magnetic stirrer at room temperature, and use a mass fraction of 10 % triethanolamine to adjust the pH of the solution to 8.5, use 1.5mL of triethanolamine, heat up at 70°C and react for 1h to obtain a transparent and viscous prepolymer solution, quickly add 40mL deionized water to dilute the prepolymer solution (follow-up involves prepolymerization The amount of polymer used is calculated based on the amount of prepolymer before dilution), cooled to room temperature for later use.

[0077] Add a mixture of 10g of epoxy resin E-51 and 2.5g of diluent ethyl phenylacetate (mass ratio 5:1) into a 500mL three-neck flask, stir for 10min, then weigh 0.5g of emulsifier dodecylbenzenesulfonic acid Dissolve sodium in 40mL deionized water, add it to the flask, stir and...

Embodiment 2

[0083] Take a certain length of basalt fiber fabric and dry it in an oven at 250°C for 2 hours to remove the sizing agent on the surface. Subsequently, 5 g of self-healing microcapsules (double-layer microcapsules) prepared in Example 1 were added to 2.5 g of water-based polyurethane, fully stirred for 1 h at a speed of 1000 r / min, and prepared into a finishing solution for subsequent use. Pour the prepared finishing solution containing self-healing microcapsules into the dipping tank, and coat the basalt yarn by padding process at a coating speed of about 40m / min, then place the finished basalt yarn in a vacuum oven Dry at 45°C for 2 hours to prepare self-healing basalt fibers.

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Abstract

The invention belongs to the technical field of materials, and in particular relates to a self-repairing microcapsule and a preparation method thereof, a self-repairing basalt fiber and a preparation method thereof. The self-healing microcapsule provided by the present invention comprises an epoxy resin capsule core and a melamine-urea-formaldehyde copolymer capsule wall layer, a curing agent layer and a melamine-urea-formaldehyde copolymer coated on the surface of the epoxy resin capsule core in sequence Floor. The self-repairing microcapsules of the present invention can be firmly loaded on the surface of the basalt fiber. When the basalt fiber is damaged, the self-repairing microcapsule with a double-layer structure will rupture due to the crack expansion, and the repairing agent (environment) flowing out of the self-repairing microcapsule Oxygen resin) and curing agent will polymerize to generate network macromolecules and repair cracks, which is beneficial to the repair of the performance of basalt fiber.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a self-repairing microcapsule and a preparation method thereof, a self-repairing basalt fiber and a preparation method thereof. Background technique [0002] Basalt fiber is a continuous fiber drawn at high speed through a platinum-rhodium alloy drawing bushing after basalt rock is melted at 1450 ° C to 1500 ° C. It is a new type of inorganic environmental protection green high-performance fiber material. It is composed of oxides such as calcium oxide, magnesium oxide, iron oxide and titanium dioxide. Basalt continuous fiber not only has high strength, but also has various excellent properties such as electrical insulation, corrosion resistance, and high temperature resistance. The excellent physical and chemical properties of basalt fiber enable it to smoothly enter the market currently dominated by carbon fiber and glass fiber. Research on the application of bas...

Claims

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Application Information

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IPC IPC(8): B01J13/14C08G12/38D06M15/564D06M15/423D06M15/55D06M23/12
CPCB01J13/14C08G12/38D06M15/423D06M15/55D06M15/564D06M23/12
Inventor 刘淑强吴改红王鹏余娟娟刘明芳张瑶李甫张曼张洁张爱琴赵万荣高伟姚容程李钰鑫白梦涵于海丹王博文
Owner TAIYUAN UNIV OF TECH
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