A phase-change microcapsule with high mechanical properties and high thermal conductivity and its preparation method
A phase change microcapsule, high thermal conductivity technology, applied in microcapsule preparations, microsphere preparation, chemical instruments and methods, etc., can solve the problems of poor thermal conductivity, poor toughness and high brittleness of melamine resin microcapsules, and improve mechanical properties. Performance, mechanical properties enhancement, thermal conductivity improvement effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0030] The preparation method of the phase-change microcapsules with both high mechanical properties and high thermal conductivity of the present invention is to use silicon carbide with excellent thermal conductivity as an inorganic filler to modify the melamine resin wall material so that it has good thermal conductivity Hydrophobic treatment of silicon carbide can improve its dispersion uniformity in phase change microcapsules, and then improve the overall modulus and stress dispersion of phase change microcapsules, so that it has excellent mechanical properties. As the core material, phase-change microcapsules with high mechanical properties and high thermal conductivity are prepared by in-situ polymerization method, which specifically includes the following steps:
[0031] (1) Preparation of hydrophobically treated silicon carbide
[0032] Dilute the silane coupling agent with absolute ethanol, adjust the pH value to 4-5, stir magnetically for 10-15 minutes, add silicon c...
Embodiment 1
[0044] Taking the phase change material paraffin as the core material, the addition of hydrophobically treated silicon carbide accounted for 1% of the mass of the etherified melamine resin prepolymer as an example.
[0045] Weigh 0.3g of silane coupling agent, add 5.7g of absolute ethanol to dilute, stir magnetically at room temperature, adjust the pH value to 4-5, react for 10 minutes, add 5g of SiC particles, continue to react for 20 minutes, heat up to 80°C with magnetic stirring After reacting for 3 hours, the product was suction-filtered, dried, cooled and ground for later use.
[0046] Add 10g of paraffin, 6g of styrene-maleic anhydride copolymer (SMA), 2g of isomeric alcohol (TO-8), and 0.5g of polyvinyl alcohol with a mass fraction of 10%, into 100g of distilled water, and in a water bath at 60°C, The emulsion was obtained by emulsifying for 30 minutes under mechanical stirring at a rotational speed of 1000 r / min.
[0047] Add 8.55 g of methyl etherified melamine resi...
Embodiment 2
[0050] Taking the phase change material paraffin as the core material, the addition of hydrophobically treated silicon carbide accounted for 2% of the mass of the etherified melamine resin prepolymer as an example.
[0051] The silicon carbide hydrophobic treatment process is the same as that of Example 1.
[0052] Add 15g of paraffin, 6g of styrene-maleic anhydride copolymer (SMA), 2g of isomeric alcohol (TO-8), and 0.5g of polyvinyl alcohol with a mass fraction of 10%, into 110g of distilled water, and in a water bath at 60°C, The emulsion was obtained by emulsifying for 35 minutes under mechanical stirring at a rotational speed of 1200 r / min.
[0053] Add distilled water to a beaker of 8.55 g of methyl etherified melamine resin prepolymer to 13 g to obtain a methyl etherified melamine resin prepolymer solution, which is set aside.
[0054] After emulsification, under the condition of stirring in a water bath at 50°C, adjust the pH of the emulsion to 3-4 with acetic acid so...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thermal conductivity | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More