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Difunctional phase change microcapsule for asphalt pavement and preparation method of difunctional phase change microcapsule

A technology of phase change microcapsules and asphalt pavement, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc. It can solve the problems affecting the service life of asphalt pavement, achieve driving safety, obtain raw materials easily, and improve asphalt Effect of road surface temperature

Inactive Publication Date: 2018-05-04
SHANXI PROVINCIAL RES INST OF COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, pavement cracking and pavement frosting and icing in winter low temperature environment basically exist every winter or early spring, which are the main reasons for low temperature cracking of asphalt pavement, which not only seriously affects the service life of asphalt pavement, but also causes serious traffic accidents. safe question

Method used

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  • Difunctional phase change microcapsule for asphalt pavement and preparation method of difunctional phase change microcapsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Preparation of high-temperature phase change material: select paraffin and tetradecane as raw materials, the ratio of the two is 6:4, add them to the stirrer in turn, and stir for 20min at a stirring speed of 1000r / min to obtain a high-temperature phase change material, The phase transition temperature is 42°C and the specific heat capacity is 3.6×10 3 J / (kg·℃), store for future use;

[0019] (2) Preparation of low temperature phase change materials: select paraffin and Na 2 CO 3 10H 2 O is the raw material, the ratio of the two is 7:3, add it to the stirrer in turn, stir at a stirring speed of 1000r / min for 30min, and heat at a temperature of 80°C to obtain a low-temperature phase change material with a phase change temperature of 2°C and store it for later use ;

[0020] (3) The wall material is epoxy resin;

[0021] (4) if figure 1 As shown, the high-temperature phase-change material, low-temperature phase-change material and wall material are respectively ...

Embodiment 2

[0023] (1) Preparation of high-temperature phase-change material: select paraffin and octadecane as raw materials, the ratio of the two is 5:5, add them to the stirrer in turn, and stir for 25min at a stirring speed of 800r / min to obtain a high-temperature phase-change material, The phase transition temperature is 45°C and the specific heat capacity is 3.5×10 3 J / (kg·℃), store for future use;

[0024] (2) Preparation of low temperature phase change materials: select paraffin, tetradecane and MgCl 2 ·6H 2 O is the raw material, and the ratio of the three is 2:3:5. Add it to the stirrer in turn, stir at a stirring speed of 1000r / min for 45min, and heat at a temperature of 100°C to obtain a low-temperature phase change material with a phase change temperature of 1°C. store for later use;

[0025] (3) The wall material is epoxy resin;

[0026] (4) if figure 1 As shown, high-temperature phase-change materials, low-temperature phase-change materials and wall materials are respe...

Embodiment 3

[0028] (1) Preparation of high-temperature phase-change materials: choose tetradecane and octadecane as raw materials, the ratio of the two is 3:7, add them to the stirrer in turn, and stir for 15 minutes at a stirring speed of 1500r / min to obtain a high-temperature phase change material, the phase transition temperature is 47°C, and the specific heat capacity is 3.3×10 3 J / (kg·℃), store for future use;

[0029] (2) Preparation of low-temperature phase change materials: choose tetradecane, Na 2 CO 3 10H 2 O and MgCl 2 ·6H 2 O is the raw material, and the ratio of the three is 5:3:2, which is sequentially added to the stirrer, stirred at a stirring speed of 1500r / min for 30min, and heated at a temperature of 100°C to obtain a low-temperature phase change material with a phase change temperature of 2°C. store for later use;

[0030] (3) The wall material is urea-formaldehyde resin;

[0031] (4) if figure 1 As shown, high-temperature phase-change materials, low-temperatur...

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Abstract

The invention belongs to the technical field of asphalt pavements and particularly relates to a difunctional phase change microcapsule for an asphalt pavement and a preparation method of the difunctional phase change microcapsule. The difunctional phase change microcapsule comprises a wall material zone, a low-temperature phase change material zone and a high-temperature phase change material zone, wherein the wall material zone comprises an outer wall serving as a microcapsule shell, and an inner wall for separating the low-temperature phase change material zone from the high-temperature phase change material zone; the mass ratio of a wall material to a low-temperature phase change material to a high-temperature phase change material is 1:(0.5-2):(0.5-3). Compared with the prior art, thedifunctional phase change microcapsule is capable of actively reducing the temperature of an asphalt pavement at a high temperature, increasing the temperature of the asphalt pavement at a low temperature, reducing high-temperature / low-temperature damage of asphalt, ensuring road running security and prolonging the service life of the asphalt pavement, overcomes the defect that a conventional microcapsule can only take one of low temperatures or high temperatures into account, meanwhile has the advantages of being simple in preparation process, easy in raw material obtaining and remarkable ineffect, and has great promotion functions on the technical field of functional asphalt pavement materials.

Description

technical field [0001] The invention belongs to the technical field of asphalt pavement, and in particular relates to a dual-functional phase-change microcapsule for asphalt pavement and a preparation method thereof. technical background [0002] Asphalt pavement is widely used in highways and urban roads due to its good flatness, comfort and low noise. However, temperature-related high-temperature rutting and low-temperature cracking of asphalt pavement significantly affect the performance and service life of asphalt pavement. When the temperature is high in summer, the asphalt pavement absorbs a lot of heat, which eventually leads to high temperature rutting, and because its temperature is much higher than the air temperature, it leads to the aggravation of the urban "heat island effect" and affects the comfort of urban residents. Therefore, reducing the temperature of asphalt pavement and alleviating the urban "heat island effect" has become one of the problems that road ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06B01J13/02
CPCB01J13/02C09K5/063
Inventor 刘哲罗鹏陈安洋孙崇亮张影申力涛穆建青蔡丽娜
Owner SHANXI PROVINCIAL RES INST OF COMM
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