Antibacterial and anti-ultraviolet color temperature regulating coating containing iron oxide/silicon dioxide coated paraffin phase-change microcapsules and preparation method thereof

A technology of phase change microcapsules and paraffin microcapsules, which is applied in the field of coatings, can solve the problems of easy agglomeration, uneven distribution of coating colors, poor dispersion, etc., and achieve the effect of high bonding fastness and good dispersion

Active Publication Date: 2020-12-25
XIAO HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method of simply doping nano-iron oxide and paraffin microcapsules in traditional coatings to prepare color temperature-adjusting coatings has disadvantages, mainly because nano-iron oxide is used as nanoparticles, and its surface energy is very high, which is prone to agglomeration Phenomenon, poor dispersion in coatings, resulting in phase separation between nano-iron oxide, paraffin phase change microcapsules and coatings, resulting in uneven color distribution of coatings, and the increase in temperature adjustment rate is not obvious

Method used

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  • Antibacterial and anti-ultraviolet color temperature regulating coating containing iron oxide/silicon dioxide coated paraffin phase-change microcapsules and preparation method thereof
  • Antibacterial and anti-ultraviolet color temperature regulating coating containing iron oxide/silicon dioxide coated paraffin phase-change microcapsules and preparation method thereof
  • Antibacterial and anti-ultraviolet color temperature regulating coating containing iron oxide/silicon dioxide coated paraffin phase-change microcapsules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Add 7.5g of paraffin and 7.5g of tetraethyl orthosilicate solution into a three-necked flask and mix them, mechanically stir for 30min at 50°C, add 1.13g of CTAB (hexadecyltrimethylbromide) dissolved in 100mL of formamide solution Ammonium chloride) solution, reacted at 1500rpm for 4h to obtain a uniform dispersed emulsion.

[0061] (2) Adjust the rotational speed to 700 rpm, take 100 mL of 1 mol / L HCl solution, add it dropwise into a three-necked flask at 2 drops / s, and react for 4 hours to obtain a white precipitate.

[0062] (3) Stop stirring, keep the temperature at 50°C, mature for 18h, pour it out, centrifuge, wash with n-hexane three times, and dry the product in an 80°C drying oven to obtain Paraffin@SiO 2 .

[0063] (4) Take 1.5g Paraffin@SiO 2 Place in a beaker, add 100mL of distilled water, and ultrasonically disperse at 80°C for 45min to obtain a uniformly dispersed solution.

[0064] (5) Transfer the solution in the beaker to a three-necked flask, ad...

Embodiment 2

[0069] (1) Add 7.0g of paraffin and 8.0g of tetraethyl orthosilicate solution into a three-necked flask and mix them, mechanically stir for 35min at 45°C, add 1.1g of CTAB (hexadecyltrimethyl bromide) dissolved in 120mL of formamide solution Ammonium chloride) solution, reacted at 1200rpm for 5h to obtain a uniform dispersed emulsion.

[0070] (2) Adjust the rotational speed to 500 rpm, take 100 mL of 0.8 mol / L HCl solution, add it dropwise into a three-necked flask at 1.5 drops / s, and react for 5 hours to obtain a white precipitate.

[0071] (3) Stop stirring, keep the temperature at 45°C, mature for 20h, pour it out, centrifuge, wash with n-hexane three times, and dry the product in a 75°C drying oven to obtain Paraffin@SiO 2 .

[0072] (4) Take 1.3g Paraffin@SiO 2 Place in a beaker, add 100mL of distilled water, and ultrasonically disperse at 75°C for 50min to obtain a uniformly dispersed solution.

[0073] (5) Transfer the solution in the beaker to a three-necked flask,...

Embodiment 3

[0078] (1) Put 8.0g of paraffin and 7.0g of tetraethyl orthosilicate solution into a three-necked flask and mix them, mechanically stir at 55°C for 25min, add 1.2g of CTAB (hexadecyltrimethyl bromide) dissolved in 120mL of formamide solution Ammonium chloride) solution, reacted at 1400rpm for 3h to obtain a uniform dispersed emulsion.

[0079] (2) Adjust the rotational speed to 600 rpm, take 100 mL of 1.2 mol / L HCl solution, add it dropwise into a three-necked flask at 2.5 drops / s, and react for 3 hours to obtain a white precipitate.

[0080] (3) Stop stirring, keep the temperature at 55°C, mature for 5h, pour it out, centrifuge, wash with n-hexane three times, and then dry the product in a drying oven at 85°C to obtain Paraffin@SiO 2 .

[0081] (4) Take 1.7g Paraffin@SiO 2 Place in a beaker, add 100mL of distilled water, and ultrasonically disperse at 85°C for 40min to obtain a uniformly dispersed solution.

[0082] (5) Transfer the solution in the beaker to a three-necked...

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Abstract

The invention relates to the field of coatings, and discloses an antibacterial and anti-ultraviolet color temperature regulating coating containing iron oxide/silicon dioxide coated paraffin phase change microcapsules and a preparation method thereof. The coating comprises 52-61% of silicone acrylic emulsion (with the concentration of 35-45wt%), 13-15% of iron oxide/silicon dioxide coated paraffinphase change microcapsules, 1-2% of ethylene glycol, 1-3% of dodecanol ester, 0.1-1% of a thickener and the balance of water. The coating contains the iron oxide/silicon dioxide coated paraffin phasechange microcapsules, the microcapsules are paraffin sequentially coated with iron oxide and silicon dioxide and are provided with double-layer shells, on one hand, the phase change material can be effectively coated to prevent leakage, the heat conductivity of the phase change material is improved, and the obtained microcapsules have excellent antibacterial activity and stability; and on the other hand, iron oxide can be used as a pigment, and after organic combination with microcapsules, compared with a traditional physical mixing mode, the combination fastness of the iron oxide and the microcapsules is high, and the dispersity in the coating is better.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an antibacterial and anti-ultraviolet color temperature-adjusting coating containing iron oxide / silicon dioxide-coated paraffin wax phase-change microcapsules and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, the requirements for the comfort of the indoor environment are getting higher and higher, and the corresponding building energy consumption is also increasing, resulting in excessive energy consumption and aggravated environmental pollution. Finding a reasonable balance among comfort, energy and environment has become an eternal theme in the field of architectural design and building energy efficiency. In recent years, people have developed many building energy-saving technologies, among which the application of phase-change energy storage materials to building materials has become a hot research and concern. As a trad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D5/14C09D7/62C09D7/61
CPCC08K2003/2272C09D5/14C09D143/04C09D7/61C09D7/62C09D7/70C08K9/10C08K5/01C08K3/22Y02P20/141
Inventor 黄金谦韦正煌黄锡马勇军连城徐国才徐斌
Owner XIAO HLDG
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