Composite phase change material and preparation method thereof as well as bituminous mixture

A composite phase-change material and hybrid material technology, applied in the field of functional materials, can solve problems such as inability to effectively alleviate low-temperature disease, affect overall pavement performance, and loss of phase-change materials, so as to shorten the occurrence time, duration, and delay of extreme low temperature Occurrence and duration of extreme low temperatures, snow and icing mitigation effects

Active Publication Date: 2018-09-07
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 pavement high-temperature diseases, but they cannot effectively alleviate low-temperature diseases. Simply wrap the phase change material and add it to the asphalt mixture in the form of powder. In this method, some phase change materials will become liquid and leak in the asphalt mixture during the phase change process, resulting in volume expansion and phase change materials. Loss, affecting the performance of the overall pavement and other shortcomings

Method used

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  • Composite phase change material and preparation method thereof as well as bituminous mixture
  • Composite phase change material and preparation method thereof as well as bituminous mixture

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The preparation method of the granular composite phase change material of the present embodiment is carried out according to the following steps:

[0033] Step (1), dry the phase-change microcapsules and epoxy resin in an oven at 80°C for later use;

[0034] Step (2), weighing an appropriate amount of phase change microcapsules and epoxy resin, mixing 3 parts of phase change microcapsules, 7 parts of epoxy resin and 0.09 part of alumina to obtain a mixed material;

[0035] Step (3), put the mixed material in step (2) into the Micro27GL-40D twin-screw extruder, use the extruder to heat through different sections, including: feeding zone temperature: 265°C, 2-section temperature: 270°C, 3-section temperature: 280°C, 4-section temperature: 280°C, 5-section temperature: 285°C, 6-section temperature: 285°C, 7-section temperature: 285°C, 8-section temperature: 285°C, 9-section Section temperature: 280°C, 10 section temperature: 280°C, mold mouth section temperature: 275°C, a...

Embodiment 2

[0044] The preparation method of the granular composite phase change material of the present embodiment is carried out according to the following steps:

[0045] Step (1), dry the phase-change microcapsules and epoxy resin in an oven at 80°C for later use;

[0046] Step (2), weighing an appropriate amount of phase-change microcapsules and epoxy resin, mixing 2 parts of phase-change microcapsules, 8 parts of epoxy resin and 0.08 parts of alumina to obtain a mixed material;

[0047] Step (3), put the mixed material in step (2) into the Micro27GL-40D twin-screw extruder, use the extruder to heat through different sections, including: feeding zone temperature: 265°C, 2-section temperature: 270°C, 3-section temperature: 280°C, 4-section temperature: 280°C, 5-section temperature: 285°C, 6-section temperature: 285°C, 7-section temperature: 285°C, 8-section temperature: 285°C, 9-section Section temperature: 280°C, 10 section temperature: 280°C, mold mouth section temperature: 275°C, ...

Embodiment 3

[0056] The preparation method of the granular composite phase change material of the present embodiment is carried out according to the following steps:

[0057] Step (1), dry the phase-change microcapsules and epoxy resin in an oven at 80°C for later use;

[0058] Step (2), weighing an appropriate amount of phase change microcapsules and epoxy resin, mixing 3 parts of phase change microcapsules, 7 parts of epoxy resin and 0.18 parts of alumina to obtain a mixed material;

[0059] Step (3), put the mixed material in step (2) into the Micro27GL-40D twin-screw extruder, use the extruder to heat through different sections, including: feeding zone temperature: 265°C, 2-section temperature: 270°C, 3-section temperature: 280°C, 4-section temperature: 280°C, 5-section temperature: 285°C, 6-section temperature: 285°C, 7-section temperature: 285°C, 8-section temperature: 285°C, 9-section Section temperature: 280°C, 10 section temperature: 280°C, mold mouth section temperature: 275°C, ...

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Abstract

The invention relates to a composite phase change material and a preparation method thereof as well as a bituminous mixture, belonging to the field of functional materials. The preparation method comprises the following steps: mixing a dried organic phase change material with epoxy resin according to a mass ratio, and adding aluminum oxide, wherein the adding amount of the aluminum oxide is 2-6% of the mass of the organic phase change material; uniformly mixing, and then putting into a twin-screw extruder to utilize extruder to extrude and mold the mixture heated at different sections, cuttinginto rectangular particles, and then solidifying; when the product has a certain strength and does not deform, taking out the particles and carrying out particle-particle separation until the productis completely solidified so as to obtain the granular composite phase change material. The preparation method provided by the invention effectively adjusts the temperature and the adding amount of the phase change material, and enables the phase change material to stably exist in the bituminous mixture, so that the temperature is more effectively adjusted, the icing is suppressed, and the other service properties of a road surface is guaranteed. The phase change modified asphalt has a phase-transition temperature between 4-6 DEG C and latent heat of phase change of greater than 20J/g, and cansolve the problems such as ice formation, frost formation and snow accumulation on the road surface.

Description

technical field [0001] The present invention relates to a preparation method of a phase change material, especially a preparation method of a composite phase change material, and also relates to a composite phase change material obtained by the preparation method, and an asphalt mixture based on the composite phase change material, which belongs to functional material field. 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. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L61/30C08K5/01C08L95/00C08L53/02
CPCC08L63/00C08L95/00C08L2201/08C08L2205/035C08L2205/18C08L61/30C08K5/01C08L53/02
Inventor 周沛延朱兴一程志豪杨正龙黎晓陈华斌郑少鹏张莹莹陈亮亮杨健陈赛程海洲
Owner BROADVISION ENG CONSULTANTS
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