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A preparation method of photocrosslinked nano-paraffin phase-change energy storage capsules

A phase-change energy storage and photo-crosslinking technology, which is applied in the direction of microcapsule preparation, microsphere preparation, heat exchange materials, etc., can solve the problems that are difficult to prepare into nanometer particle size, and achieve shell stability, environmental friendliness, and easy operation. simple effect

Active Publication Date: 2017-01-04
FOSHAN SHUNDE DISTRICT G SB COATING EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a photo-crosslinked nano-paraffin phase-change energy storage capsule, which uses a photo-crosslinked amphiphilic ternary molecular brush polymer to construct the structure The stable nano-paraffin phase-change energy storage capsule solves the problem that traditional paraffin capsules are difficult to prepare into nano-sized particles, and at the same time provides a stable cross-linked shell structure for paraffin capsules to protect the paraffin from leaking during the phase change process. Its cross-linking speed is fast, the cross-linking degree is high, the shell is stable, the operation is simple, the environment is friendly, and it can be prepared on a large scale

Method used

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  • A preparation method of photocrosslinked nano-paraffin phase-change energy storage capsules
  • A preparation method of photocrosslinked nano-paraffin phase-change energy storage capsules
  • A preparation method of photocrosslinked nano-paraffin phase-change energy storage capsules

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The photocrosslinked amphiphilic ternary molecular brush polymer is prepared by the following steps:

[0032] Step 1 P(GMA-N 3 ) Synthesis of Main Chain A

[0033] Take 3 parts of ethyl 2-bromoisobutyrate initiator, 300 parts of glycidyl methacrylate (GMA), 200 parts of diphenyl ether, 2 parts of CuBr and 2 parts of N,N,N', N',N"-pentamethyldiethylenetriamine (PMDETA) was subjected to ATRP reaction at room temperature under the protection of nitrogen to obtain polyglycidyl methacrylate (PGMA) with a degree of polymerization (DP) of 30.

[0034] Take 200 parts of PGMA (DP=30), 200 parts of NaN 3 , 400 parts of dimethylformamide (DMF) and 1 part of AlCl 3 , at 50 o C was reacted for 20 hours to obtain P(GMA-N 3 ), as the main chain.

[0035] Step 2 Synthesis of three side chains

[0036] Synthesis of side chain D: Take 200 parts of monomethoxy polyethylene glycol (Mn=5000), 40 parts of 2-propynylacetic acid, 10 parts of 4-dimethylaminopyridine (DMAP), 10 parts of ...

Embodiment 2

[0046] The preparation method and raw material composition are the same as in Example 1. Only by adjusting the polymerization degree of the main chain and lipophilic side chain of the photo-crosslinked amphiphilic ternary molecular brush polymer in Example 1, different particles can be obtained. diameter-sized nano-paraffin phase-change energy storage capsules. The degree of polymerization of the main chain and three side chains, and the particle size of the nano-paraffin phase-change energy storage capsules are shown in Table 1.

[0047] Polymers with main chain polymerization degrees of 100, 200, and 300 and lipophilic side chains with polymerization degrees of 17, 24, and 29 can be prepared by controlling raw materials or polymerization reaction time according to the method in Example 1. The grafting ratios of each photocrosslinked amphiphilic ternary polymer molecular brush polymer PEG, PCEMA, and new oil side chains were 30%, 10%, and 30%, respectively.

[0048] Table 1:...

Embodiment 3

[0052] The preparation method and raw material composition are the same as in Example 1, only changing the composition of the hydrophilic side chain of the photo-crosslinked amphiphilic ternary molecular brush polymer in Example 1, and nano-paraffin phase transitions with different particle sizes can be obtained. Energy storage capsules. The composition of the hydrophilic side chain and the particle size of the nano-paraffin phase-change energy storage capsules are shown in Table 2.

[0053] The preparation method of PHEMA, PHEA, PVA, PHPMA, and PAA with a degree of polymerization of the hydrophilic side chain of 60 is prepared by common ATRP.

[0054] The grafting ratios of the hydrophilic, PCEMA, and new oil side chains of each amphiphilic ternary polymer molecular brush were 30%, 10%, and 30%, respectively.

[0055] Table 2: The influence of the hydrophilic side chain composition of molecular brushes on the particle size of nano-paraffin phase-change energy storage capsule...

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Abstract

The invention relates to a preparation method of a photo cross-linking type nano paraffin phase-change energy-storage capsule. The method comprises the following steps: dissolving 1-10 parts of a photo cross-linking amphiphilic ternary molecule brush polymer into 1-20 parts of dichloromethane and 1-30 parts of paraffin; mechanically stirring at room temperature at 1,000rpm to obtain a mixed solution; dripping the mixed liquid into 1-200 parts of water, stirring for 28-32 minutes, heating to 48-52 DEG C, keeping for 28-32 minutes, and volatilizing dichloromethane to obtain a paraffin-in-water emulsion; and illuminating the paraffin-in-water emulsion in ultraviolet light for an hour to obtain the nano capsule with a stable structure. The preparation method has the advantages that the problem that a traditional paraffin capsule with a nano particle size cannot be easily prepared is solved; meanwhile, a stable cross-linking shell layer structure is provided for the paraffin capsule, and thus the effect that the paraffin is prevented from leaking in the phase change process is achieved; the preparation method is high in cross-linking speed, high in cross-linking degree, stable in shell layer, simple to operate, and friendly to environment; and large-scale preparation can be reached.

Description

technical field [0001] The invention belongs to the field of phase-change energy storage materials and self-assembled polymer materials, and in particular relates to a preparation method of photocrosslinked nano-paraffin phase-change energy storage capsules. Background technique [0002] Green building refers to the maximum saving of resources, energy saving, land saving, water saving, material saving, environmental protection and pollution reduction in the whole life cycle of the building, and provides healthy, applicable, efficient use and harmonious coexistence with nature. One of the core issues of green buildings is the control of indoor temperature, minimizing the air conditioning system to maintain indoor temperature. In order to achieve the regulation of building temperature, it is often necessary to use some insulation materials to achieve the purpose of regulating the indoor temperature. At present, as heat insulation materials for building lightweight envelopes, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/14C08G81/02C09K5/06
CPCB01J13/14C08G81/02C09K5/06
Inventor 刘锋刘洪波邹海良
Owner FOSHAN SHUNDE DISTRICT G SB COATING EQUIP
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