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Phase-change microcapsule for inhibiting pavement from being iced and preparation method

A technology of phase-change microcapsules and core materials, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve problems such as inability to effectively alleviate low-temperature diseases, and achieve the suppression of icing and frosting on the road surface and latent heat of phase change Large, anti-icing effect

Active Publication Date: 2018-07-20
BROADVISION ENG CONSULTANTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the existing phase-change materials, there are phase-change temperature-regulating agents for the high-temperature disease of the pavement, but they cannot effectively alleviate the low-temperature disease. Therefore, there is an urgent need for an effective solution to the low-temperature disease of the existing asphalt pavement, and it is convenient for later cleaning and maintenance. Processed Phase Change Materials

Method used

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  • Phase-change microcapsule for inhibiting pavement from being iced and preparation method
  • Phase-change microcapsule for inhibiting pavement from being iced and preparation method
  • Phase-change microcapsule for inhibiting pavement from being iced and preparation method

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Embodiment 1

[0033] The preparation method of the phase-change microcapsules for inhibiting road surface icing of the present embodiment may further comprise the steps:

[0034] Step (1), pre-polymerization of wall materials:

[0035] Dissolve urea, melamine and formaldehyde in a three-necked flask with a molar ratio of 3:1:6, add 25ml of distilled water, gradually drop in triethanolamine, adjust the pH to 8.5, and stir at a speed of 400r / min and an oil bath temperature of 70°C , react for 1h until the solution is clear and transparent, which is the prepolymer of melamine-modified urea-formaldehyde resin.

[0036] Step (2), emulsification of core material:

[0037] Add 0.3g of emulsifier sodium dodecylbenzenesulfonate to the beaker, add 100ml of distilled water to prepare a solution, add 10g of n-tetradecane into the aqueous solution, and disperse for 20min at a stirring speed of 600r / min , forming a stable oil-in-water (O / W) emulsion;

[0038] Step (3), the formation of microcapsules: ...

Embodiment 2

[0042] The preparation method of the phase-change microcapsules for inhibiting road surface icing of the present embodiment may further comprise the steps:

[0043] Step (1), pre-polymerization of wall materials:

[0044] Dissolve urea, melamine and formaldehyde in a three-necked flask with a molar ratio of 4:2:5, add 30ml of distilled water, gradually drop in triethanolamine, adjust the pH to 9.5, and stir at a speed of 300r / min and an oil bath temperature of 66°C , react for 1h until the solution is clear and transparent, which is the prepolymer of melamine-modified urea-formaldehyde resin.

[0045] Step (2), emulsification of core material:

[0046] Add 0.3g of emulsifier sodium dodecylbenzenesulfonate to the beaker, add 100ml of distilled water to prepare a solution, add 10g of n-tetradecane into the aqueous solution, and disperse for 15min at a stirring speed of 500r / min , forming a stable oil-in-water (O / W) emulsion;

[0047] Step (3), the formation of microcapsules: ...

Embodiment 3

[0051] The preparation method of the phase-change microcapsules for inhibiting road surface icing of the present embodiment may further comprise the steps:

[0052] Step (1), pre-polymerization of wall materials:

[0053] Dissolve urea, melamine, and formaldehyde in a three-necked flask with a molar ratio of 5:3:7, add 30ml of distilled water, gradually drop triethanolamine, adjust the pH to 9, and stir at a speed of 500r / min and an oil bath temperature of 75°C , React for 2h until the solution is clear and transparent, which is the prepolymer of melamine-modified urea-formaldehyde resin.

[0054] Step (2), emulsification of core material:

[0055] Add 0.3g of emulsifier sodium dodecylbenzenesulfonate to the beaker, add 100ml of distilled water to make a solution, add 10g of n-tetradecane into the aqueous solution, and disperse for 30min at a stirring speed of 700r / min , forming a stable oil-in-water (O / W) emulsion;

[0056] Step (3), the formation of microcapsules:

[005...

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Abstract

The invention relates to a phase-change microcapsule for inhibiting a pavement from being iced and a preparation method, and belongs to the field of functional materials. The phase-change microcapsulecomprises a wall material and a core material, wherein the wall material is made from a melamine modified urea-formaldehyde resin prepolymer; the melamine modified urea-formaldehyde resin prepolymeris prepared from melamine, urea and formaldehyde according to a molar ratio of (3 to 5) to (1 to 3) to (5 to 7); the mass ratio of the wall material to the core material is (0.5 to 0.8) to 1. The phase-change microcapsule can be used for effectively controlling the low-temperature distress of an asphalt pavement, and has the advantages of being high in phase-change latent heat, simple to prepare and reversible in phase-change process, free from toxicity and corrosivity and being capable of effectively inhibiting the pavement from being iced and frosted, and the like, is used for improving theadaptive capacity, to the change of an ambient temperature, of the asphalt pavement, and is used for providing help for containing a temperature shrinkage crack and prolonging the service life of an existing pavement.

Description

technical field [0001] The invention relates to a phase-change microcapsule, in particular to a phase-change microcapsule for inhibiting road icing, and a preparation method thereof, which belongs to the field of functional materials. Background technique [0002] Road snow melting and deicing technology is an important measure for the sustainable development of the future energy transportation field. Snow and ice on roads can easily cause traffic accidents and reduce the service life of pavement structures. At present, there are two main methods adopted by various countries, mechanical method and ablation method. The mechanical method is suitable for large-scale mechanized removal operations, but it often needs to be completed after snow, which hinders traffic and is difficult to completely remove after the road surface is icy. There are chemical snow melting method and thermal melting method. The chemical snow melting method relies on chemical snow melting agent. The dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/16
CPCB01J13/16C09K5/063
Inventor 周沛延朱兴一程志豪杨正龙黎晓郑少鹏陈亮亮陈华斌张莹莹杨健陈赛程海洲
Owner BROADVISION ENG CONSULTANTS
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