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Preparation method of nano-encapsulated phase change material

A phase change material and nanocapsule technology, applied in the field of nanomaterials, can solve the problems of long preparation time, complicated experimental process, and unsuitable for large-scale production.

Inactive Publication Date: 2016-05-18
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

The traditional preparation method of nanocapsule phase change materials takes a long time to prepare and the experimental process is complicated, which is not suitable for large-scale production

Method used

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  • Preparation method of nano-encapsulated phase change material
  • Preparation method of nano-encapsulated phase change material
  • Preparation method of nano-encapsulated phase change material

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preparation example Construction

[0029] like figure 1 The preparation method of the nanocapsule phase-change material of one embodiment shown, comprises the steps:

[0030] S10, uniformly mixing the phase change material and the acrylic ester according to a mass ratio of 2:3˜1:2 to obtain a first mixed liquid.

[0031] The phase change material is an alkane phase change material with a phase change temperature between 20°C and 30°C.

[0032] Specifically, the phase change material may be liquid paraffin. In this embodiment, the phase change material is liquid paraffin with a phase change temperature of 20°C.

[0033] The acrylic ester may be methyl methacrylate.

[0034] The homogeneous mixing operation of phase change material and acrylic ester can be realized by ultrasonic dispersion.

[0035] S20. Adding an emulsifier solution to the first mixed liquid obtained in S10 to emulsify the first mixed liquid to obtain a uniformly dispersed second mixed liquid.

[0036] The mass ratio of the emulsifier in th...

Embodiment 1

[0053] Mix 7.5 g of liquid paraffin and 12.10 g of methyl methacrylate, and uniformly disperse by ultrasonic for 5 min to obtain a first mixed solution.

[0054] Add 1 g of sodium dodecyl benzene sulfonate to 42.5 mL of deionized water to disperse uniformly, and add it to the first mixed solution and mix evenly for 10 minutes. Mechanical stirring was performed, and then the reaction system was heated to 80° C. and kept for 30 minutes to form a uniformly dispersed milky white microemulsion, which was the second mixed solution. Mechanical agitation was accomplished with a sheet-mounted stainless steel stirring rod, and the mechanical stirring speed was 600 rpm / min.

[0055] 1 g of ammonium persulfate was dissolved in 7.5 mL of deionized water and slowly added dropwise to the second mixture. After the dropwise addition is completed, the third mixed solution is obtained after mixing, and the temperature of the third mixed solution is adjusted to 85 ° C and kept for 30 min, then t...

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Abstract

The invention discloses a preparation method of a nano-encapsulated phase change material. The preparation method comprises the following steps: a phase change material and acrylic ester are uniformly mixed according to a mass ratio 2:3-1:2, and first mixed liquor is obtained; an emulsifier solution is added for emulsification of the first mixed liquor, and uniformly dispersed second mixed liquor is obtained; an initiator solution is added with uniformly mixing, a third mixed liquor is obtained, temperature of the third mixed liquor is adjusted to 82-85 DEG C, insulation is carried out for 20-50 minutes, temperature of the third mixed liquor is adjusted to 80-83 DEG C, insulation is carried out till full reaction, temperature is reduced to room temperature, and a crude product is obtained; purification is carried out for the crude product, and the nano-encapsulated phase change material is obtained. Conditions for polymerization are controlled, so that on one hand full polymerization of the acrylic ester is guaranteed, and on the other hand reaction time is substantially reduced; the method is suitable for large scale production.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a preparation method of a nanocapsule phase change material. Background technique [0002] Microcapsule phase change material (MEPCM) and nanocapsule phase change material (NEPCM) are composed of capsule structure with phase change material (PCM) as core material and organic or inorganic material as shell layer. The main function of this capsule structure is to maintain the shape of the phase change material and to prevent the leakage of its phase change process. For the research on MEPCM at the micron scale, there are already industrialized products coming out, which are mainly used in construction, solar energy and other fields. The shell material of the microcapsules is mainly organic polymer. At present, the particle size of mainstream capsule products on the market is usually on the micron scale. For applications in special fields, such as functional thermal fluids, nanocapsule...

Claims

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Application Information

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IPC IPC(8): C09K5/06B01J13/16
Inventor 孙蓉吴晓琳史剑符显珠
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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