Poly(meth)acrylate long-chain alkyl ester phase-change latex dispersion and its preparation method and application

A long-chain alkyl acrylate and dispersion technology, which is applied in the field of phase change materials, can solve problems such as unsuitable phase change characteristics, restrictions on the application of phase change materials, and inability to form films, and achieve high phase change enthalpy and good phase change. Variable characteristics and good thermal stability

Active Publication Date: 2021-02-19
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] And in the actual application process, no matter what kind of phase change material it is, it is not suitable as a universal phase change additive to endow other materials with phase change characteristics, and it cannot form a film by itself, which limits the phase change to a certain extent. material application

Method used

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preparation example Construction

[0025] The preparation method of the poly(meth)acrylic acid long-chain alkyl ester phase-change latex dispersion liquid of the present invention, the steps are as follows:

[0026] Step 1, adding the ionic emulsifier and deionized water into the reaction device, stirring at a temperature between the melting point of the monomer and the decomposition temperature of the initiator, so that the ionic emulsifier is dissolved in the deionized water;

[0027] Wherein, the ionic emulsifier is sodium dodecylbenzenesulfonate or sodium dodecylsulfonate;

[0028] The dosage of the ionic emulsifier is 0.5%-100% of the mass of the monomer. There is no limit to the mass ratio of the ionic emulsifier to the deionized water, as long as the ionic emulsifier is dissolved in the deionized water;

[0029] If the temperature is lower than the melting point of the monomer, the monomer and the nonionic emulsifier cannot be mixed well. If the temperature is higher than the decomposition temperature of...

Embodiment 1

[0046] Step 1. The temperature of the water bath is 50°C. Put 10g of sodium dodecylbenzenesulfonate and 200mL of deionized water into a four-neck flask, start stirring at a speed of 500r / min, and dissolve the sodium dodecylbenzenesulfonate in the deionized water;

[0047] Step 2. Heat and melt 20g of stearyl acrylate in a small beaker in advance, pour it into a four-neck flask, add 60mL of non-ionic emulsifier OP-10, keep the temperature and speed of the water bath unchanged, and continue to stir for 2 hours to fully emulsify;

[0048] Step 3, nitrogen protection, remove the air in the four-necked bottle, add 0.07g of initiator benzoyl peroxide, stir for 4 hours at a water bath temperature of 75°C, and a stirring speed of 500r / min to obtain a dispersion.

[0049] After testing, the obtained latex dispersion liquid has a melting point of 50° C., a crystallization temperature of 39° C., and a phase change enthalpy of 60 J / g after drying.

Embodiment 2

[0051] Step 1. The temperature of the water bath is 50°C. Put 8g of sodium dodecylbenzenesulfonate and 200mL of deionized water into a four-necked flask, start stirring at a speed of 450r / min, and dissolve the sodium dodecylbenzenesulfonate in the deionized water;

[0052] Step 2: Heat and melt 16g of stearyl acrylate and 4g of methyl methacrylate in a small beaker in advance, then pour it into a four-neck flask, add 50mL of non-ionic emulsifier OP-10, keep the water bath temperature and speed unchanged, continue Stir for 2 hours to fully emulsify;

[0053] Step 3: Nitrogen protection, remove the air in the four-necked bottle, add 0.07g of initiator benzoyl peroxide, stir for 4 hours at a water bath temperature of 75°C, and a stirring speed of 450r / min, and continue the reaction to obtain a dispersion.

[0054] After testing, the obtained latex dispersion liquid has a melting point of 48° C., a crystallization temperature of 38° C., and a phase transition enthalpy of 50 J / g a...

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Abstract

The invention relates to a poly(meth)acrylic acid long-chain alkyl ester phase-change latex dispersion and a preparation method and application thereof, belonging to the technical field of phase-change materials. Solved how to provide a phase change latex dispersion with adjustable phase change temperature, high phase change enthalpy, capable of forming a film by itself and with other latex, suitable for mixing with a carrier to endow the carrier with phase change characteristics and The problem of its preparation method. In the preparation method of the present invention, the ionic emulsifier and deionized water are first added to the reaction device, stirred to dissolve the ionic emulsifier; Emulsification to obtain an emulsion; finally, an inert atmosphere is introduced into the reaction device, an initiator is added to the emulsion, and the reaction is stirred to obtain a phase-change latex dispersion. The phase change temperature of the dispersion liquid is adjustable, the phase change enthalpy is high, it can form a film by itself, and can form a film together with other latex, and it is suitable for mixing with a carrier to endow the carrier with phase change characteristics.

Description

technical field [0001] The invention relates to a poly(meth)acrylic acid long-chain alkyl ester phase-change latex dispersion and a preparation method and application thereof, belonging to the technical field of phase-change materials. Background technique [0002] Using the heat absorption and heat release of certain substances during the phase change process, heat energy storage and release and temperature regulation can be carried out. Such substances with heat energy storage and temperature regulation functions are called phase change materials (PCM for short). . When the external temperature rises, the phase change material changes from an ordered state to a disordered state and absorbs heat, and when the temperature drops, it reverses and releases the same heat, and the temperature is approximately unchanged during the phase change process. These characteristics make the phase change material Variable materials are widely used in various military and civilian fields, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/18C08F220/18C08F220/14C09K5/06C08J5/18
CPCC08F120/18C08F220/18C08J5/18C08J2333/08C08J2333/10C09K5/063C08F220/1812C08F220/1818C08F220/14
Inventor 刘凌志门永锋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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