Polyacrylate phase change microcapsules and preparation method thereof

A polyacrylate, phase-change microcapsule technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of weak shielding effect, inability to effectively shield ultraviolet rays, etc., and achieve high thermal stability and excellent anti-ultraviolet effect. , the preparation method is simple and easy to operate

Pending Publication Date: 2021-08-13
ZHEJIANG TRANSFAR FUNCTIONAL NEW MATERIAL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-titanium dioxide has a weak shielding effect on ultraviolet rays in the UVA band, and titanium dioxide alone cannot effectively shield ultraviolet rays.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, 50g octadecane, 27g methyl methacrylate, 5.5g methacrylic acid, 5g 2-hydroxy-4-propenyloxybenzophenone, 14g dipropylene glycol diacrylate, 3.5g trimethylolpropane triacrylic acid Ester and 1.5g of azobisisobutyronitrile are mixed uniformly to form an oil phase, 35.5g of 10% polyvinyl alcohol aqueous solution is added to 95g of deionized water to form a water phase, the oil phase is added to the water phase, and a high-speed shear emulsifier is used to Emulsify at a speed of 3000r / min for 20min to obtain a uniform oil / water emulsion.

[0028] Then the above emulsion was transferred to a 500ml four-neck flask, heated to 80-85°C, and polymerized for 5 hours under nitrogen protection to obtain an anti-ultraviolet phase transition microcapsule suspension. The solid content of the obtained microcapsule suspension is 47%, the particle diameter of the microcapsule is 5-10um, and the heat resistance stability is higher than 300°C.

[0029] A differential scanning calorim...

Embodiment 2

[0031] First, 50g of octadecane, 9.3g of methyl methacrylate, 2g of methacrylic acid, 5g of 2-hydroxy-4-[2'-hydroxy-3'-(acryloyloxypropyl)]benzophenone, 8.7 1g of dipropylene glycol diacrylate and 0.5g of azobisisobutyronitrile are mixed uniformly to form an oil phase, 20g of 10% polyvinyl alcohol aqueous solution is added to 70g of deionized water to form a water phase, the oil phase is added to the water phase, and the A shear emulsifier was used to emulsify for 20 minutes at a speed of 3000r / min to obtain a uniform oil / water emulsion.

[0032] Then the above emulsion was transferred to a 500ml four-neck flask, heated to 80-85°C, and polymerized for 5 hours under nitrogen protection to obtain an anti-ultraviolet phase transition microcapsule suspension. The solid content of the obtained microcapsule suspension is 47%, the particle diameter of the microcapsule is 5-10um, and the heat resistance stability is higher than 300°C.

[0033] A differential scanning calorimeter (Q200,...

Embodiment 3

[0035] First, 50g of methyl palmitate, 10.5g of methyl methacrylate, 2g of methacrylic acid, 5g of 2-hydroxy-4-[2'-hydroxy-3'-(acryloyloxypropyl)]benzophenone, Mix 7.5g of trimethylolpropane triacrylate and 0.5g of azobisisobutyronitrile evenly to form an oil phase, add 20g of 10% polyvinyl alcohol aqueous solution to 70g of deionized water to form a water phase, and add the oil phase to the water phase In the process, a high-speed shear emulsifier was used to emulsify for 20 minutes at a speed of 3000r / min to obtain a uniform oil / water emulsion.

[0036] Then the above-mentioned emulsion was transferred to a 500ml four-neck flask, the temperature was raised to 80-85° C., and under the condition of nitrogen protection, the polymerization reaction was carried out for 5 hours to obtain an anti-ultraviolet phase change microcapsule suspension. The solid content of the obtained microcapsule suspension is 47%, the particle diameter of the microcapsule is 5-10um, and the heat resist...

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PUM

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Abstract

The invention discloses polyacrylate phase change microcapsules and a preparation method thereof. According to the preparation method, an organic anti-ultraviolet absorbent is combined with an acrylate monomer through chemical reaction, anti-ultraviolet modified polyacrylate is taken as a wall material, a low-melting-point phase change material is taken as a core material, and the microcapsules with an anti-ultraviolet function and an intelligent temperature control function are prepared through a suspension polymerization method. The preparation method of the polyacrylate phase change microcapsules is simple and mild in reaction condition, and the prepared phase change microcapsules are uniform in particle size distribution, good in thermal stability, capable of being subjected to high-temperature heat setting treatment and good in application prospect in the fields of multifunctional summer textiles and outdoor textiles.

Description

technical field [0001] The invention belongs to the field of functional microcapsules, in particular to a polyacrylate phase-change microcapsule with dual functions of anti-ultraviolet and intelligent temperature control and a preparation method thereof. Background technique [0002] Phase change materials are a class of materials with good energy storage functions. During its phase transformation process, it can absorb or release a large amount of heat and keep its own temperature approximately constant, thereby realizing energy storage and release, and can be reused. However, phase change materials are prone to leakage and phase separation during the phase change process, which greatly limits their applications. Microencapsulation technology not only overcomes the shortcoming of easy leakage of phase change materials, but also increases the heat transfer rate and specific surface area of ​​phase change materials through microencapsulation, so that phase change materials h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 陈萍萍杨小波王胜鹏司马聪陈八斤徐小平何文栋
Owner ZHEJIANG TRANSFAR FUNCTIONAL NEW MATERIAL CO LTD
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