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Phase change latex and preparation method thereof

A latex and phase change technology, applied in the field of industrial chemical industry, can solve the problems of oil resistance, chemical resistance, poor self-adhesiveness and mutual adhesion, limited application range, and failure to achieve the best compatibility effect, etc.

Active Publication Date: 2021-05-07
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

EPDM rubber is basically a saturated high polymer with very good aging resistance, good weather resistance, excellent electrical insulation performance, good chemical corrosion resistance, and good impact elasticity, but due to EPDM rubber Belonging to non-polar rubber, its oil resistance, chemical resistance, self-adhesion and mutual adhesion are poor, so its application range is limited
In addition, using EPDM as the support material of the phase change material has good compatibility with paraffin, but the best compatibility effect has not been achieved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A phase-change latex, comprising the following raw materials in parts by weight: EPDM rubber 70 parts, paraffin wax 30 parts, sodium lauryl sulfate 2.5 parts, Span-80 1.5 parts, petroleum ether 1400 parts, deionized water 700 parts share;

[0020] The preparation method of the phase change latex is as follows: EPDM rubber and paraffin are placed in petroleum ether and stirred for 8 hours to make it into a uniform and stable solution, adding emulsifiers sodium lauryl sulfate and Span-80, using three Adjust its pH=8~9 with ethanolamine; And emulsify with emulsification machine high-speed shear emulsification 3min, promptly obtain the paraffin wax phase-change latex containing EPDM rubber; The shear speed of described emulsifier high-speed shear emulsification is 10m / s;

[0021] The obtained phase change latex has a phase change enthalpy of 75.4 J / g, a particle size of the latex between 920-1680 nm, and a zeta potential of -62 mV.

Embodiment 2

[0023] A phase change latex, comprising the following raw materials in parts by weight: 60 parts of EPDM rubber, 40 parts of paraffin, 1 part of sodium dodecylsulfonate, 5 parts of OP-10, 1100 parts of petroleum ether, deionized water 500 copies;

[0024] The preparation method of described phase-change latex is: EPDM rubber and paraffin are placed in sherwood oil and stirred for 12h to make it become a uniform and stable solution, add emulsifier sodium laurylsulfonate and Span-80, use Adjust its pH=9~11 with NaOH solution; And emulsify with emulsifier high-speed shearing 5min, namely obtain the paraffin wax phase-change latex containing EPDM rubber; The shear velocity of described emulsifier high-speed shear emulsification is 8m / s;

[0025] The phase change enthalpy of the obtained phase change latex is 102.3 J / g, the latex particle size is between 1110-1580 nm, and the zeta potential is -58 mV.

Embodiment 3

[0027] A kind of phase change latex, comprises the raw material composition of following parts by weight: EPDM rubber 45 parts, paraffin 55 parts, sodium lauryl sulfonate 4 parts, Span-80 3 parts, sherwood oil 1250 parts, deionized water 1100 copies;

[0028] The preparation method of described phase-change latex is: EPDM rubber and paraffin are placed in sherwood oil and stirred for 15h to make it become a uniform and stable solution, add emulsifier sodium laurylsulfonate and Span-80, use Adjust its pH=8~10 with NaOH solution; And emulsify with emulsifying machine high-speed shearing 7min, namely obtain the paraffin wax phase-change latex containing EPDM rubber; The shearing speed of described emulsifying machine high-speed shearing emulsifying is 12m / s;

[0029] The phase change enthalpy of the obtained phase change latex is 134.7 J / g, the latex particle size is between 980-1890 nm, and the zeta potential is -62 mV.

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Abstract

The invention discloses a phase-change latex and a preparation method thereof. The high-speed shearing emulsification of the emulsifying machine obtains the phase change latex; the shearing speed of the high-speed shearing emulsification of the emulsifying machine is 5m / s~20m / s, and the emulsification time is 0.5min~10min; the pH adjustment adopts triethanolamine, ammonia water, Any one of the NaOH solutions, adjust the pH to 7-12. The phase change latex prepared by the method has good stability and can be compounded with other fillers in a latex state to prepare a rubber product with a phase change energy storage function. The method has low cost, high efficiency, easy industrialization and wide application prospect, and the prepared phase change latex can broaden the application fields of rubber and phase change materials.

Description

technical field [0001] The invention relates to a phase change latex and a preparation method thereof, belonging to the technical field of industrial chemical engineering. Background technique [0002] Paraffin wax is the lubricating oil fraction obtained from crude oil distillation, which is refined by solvent, dewaxed by solvent, or frozen and crystallized by wax, dewaxed by pressing to obtain wax paste, and then deoiled, and supplemented with flaky or needle-shaped crystals obtained by refining. The composition is straight-chain alkanes, which are a variety of hydrocarbons, that is, mixtures of hydrocarbons with different molecular weights. As a phase change material, paraffin wax has the advantages of large phase change enthalpy, non-toxicity and easy acquisition. In recent years, researchers have conducted a series of studies on the preparation, performance testing and heat transfer theory and experiments of paraffin wax emulsions, all of which show that paraffin wax i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L91/06C08K5/41C08J3/11C08J3/09
CPCC08J3/095C08J3/11C08J2323/16C08J2491/06C08K5/41Y02P20/54
Inventor 杨文彬丁泽杨学林刘德春何韧范敬辉张凯
Owner SOUTHWEAT UNIV OF SCI & TECH
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