Silicon nitride-modified phase-change and energy-storage microcapsule and preparation method thereof

A phase-change energy storage and microcapsule technology, which is applied in the direction of microcapsule preparation, microsphere preparation, chemical instruments and methods, etc., can solve the problem of large difference in structure between inorganic rigid particles and organic phases, failure to achieve beneficial properties, and damage to polymers. Performance and other issues, to achieve good interface performance, property improvement, and improve the effect of temperature resistance

Active Publication Date: 2014-05-21
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
View PDF4 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high surface free energy of nano-silicon nitride, it is easy to form agglomerations. When it is added to the polymer matrix as a filler, due to the large difference in structure between the inorganic rigid particles and the organic phase, the compatibility is poor, resulting in nano-nitrogen It is diffi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silicon nitride-modified phase-change and energy-storage microcapsule and preparation method thereof
  • Silicon nitride-modified phase-change and energy-storage microcapsule and preparation method thereof
  • Silicon nitride-modified phase-change and energy-storage microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] 1) Weigh 3g of γ-methacryloxypropyltrimethoxysilane (KH570) and add 10g of ethanol to prepare an alcohol solution, then add 1.5g of silicon nitride powder, ultrasonic treatment for 15min, and then soak for 48h at 50℃ Dry in an oven to obtain grafted silicon nitride powder. 2) Heat up 12g of n-octadecane to melt while maintaining the temperature and add 0.5g of grafted silicon nitride powder and 1g of styrene-maleic anhydride copolymer obtained in step 1), stir at 600rpm for 15min, and then Ultrasound for 15 minutes to form an emulsion. 3). Add the emulsion prepared in step 2) to 200g of deionized water, then add 1g of sodium lauryl sulfate and 2g of styrene maleic anhydride copolymer, and stir for 10min with a high-speed shear emulsifier at 6000rpm. . 4). Add 1g of the grafted silicon nitride powder obtained in step 1), 3g of pentaerythritol tetraacrylate, and 0.3g of azobisisobutyl cyanide to 10g of methyl methacrylate, and use a high-speed shearing ...

Example Embodiment

[0036] Example 2

[0037] 1) Weigh 3g γ-(2,3-glycidoxy)propyltrimethoxysilane (KH560) and add 30g methanol to prepare an alcohol solution, then add 2g silicon nitride powder, ultrasonic treatment for 10min, then soak 10h, drying in an oven at 50°C to obtain grafted silicon nitride powder. 2) Heat up 50g n-butyl stearate to melt while keeping the temperature and add 1g grafted silicon nitride powder and 1g styrene-maleic anhydride copolymer obtained in step 1), stir at 600rpm for 10min, then Ultrasound for another 15 minutes to form an emulsion. 3). Add the emulsion prepared in step 2) to 500 g of deionized water, add 1 g of sodium lauryl sulfate and 2 g of styrene-maleic anhydride copolymer, and stir for 5 minutes with a high-speed shear emulsifier at 5000 rpm . 4) Add 1g of the grafted silicon nitride powder obtained in step 1), 1g of pentaerythritol tetraacrylate, and 0.1g of azobisisobutyl cyanide to 50g of methyl methacrylate, and use a high-speed homogenizer at 6000rpm S...

Example Embodiment

[0038] Example 3

[0039] 1) Weigh 30g γ-methacryloxypropyltrimethoxysilane (KH570) into 100g ethanol to prepare an alcohol solution, then add 15g silicon nitride powder, ultrasonic treatment for 40min, then soak for 60h, and dry at room temperature. The grafted silicon nitride powder is obtained. 2) Heat 70g n-butyl stearate to melt while maintaining the temperature and add 5g grafted silicon nitride powder and 1g styrene-maleic anhydride copolymer obtained in step 1), stir at 800rpm for 20min, then After sonication for 50 minutes, an emulsion was formed. 3). Add the emulsion prepared in step 2) to 800g of deionized water, add 2g of sodium lauryl sulfate, 10g of styrene-maleic anhydride copolymer, and stir for 20min with a high-speed shear emulsifier at 10000rpm . 4) Add 10g of grafted silicon nitride powder obtained in step 1), 10g of divinylbenzene, 4g of azobisisobutyronitrile to 50g of methyl methacrylate, and use a high-speed shear emulsifier at 8000rpm Stir for 20min. ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a silicon nitride-modified phase-change and energy-storage microcapsule, comprising a shell material and a cladded core material, wherein the shell material comprises the following raw materials in parts by weight: 50-100 parts of high-molecular polymers and 1-20 parts of silicon nitride powder which is evenly dispersed into the high-molecular polymers; the core material comprises 50-100 parts of organic phase-change and energy-storage materials and 1-20 parts of silicon nitride powder which is evenly dispersed into the organic phase-change and energy-storage materials. The invention also provides a preparation method of the phase-change energy-storage microcapsule. The thermal conductivity of the phase-change and energy-storage material is improved, overheat and overcold degrees in the phase-change process are inhibited, and meanwhile, the thermal endurance and the abrasive resistance, the thermal shock resistance, the fatigue resistance and the like also are improved. The silicon nitride-modified phase-change and energy-storage microcapsule is relatively simple in preparation technology, available in raw materials, strong in controllability, and applicable to the industrial large-scale production, an existing industrial processing technology can be fully utilized, and the performance of the phase-change and energy-storage microcapsule is improved.

Description

technical field [0001] The invention relates to a phase change energy storage microcapsule and a preparation method thereof, in particular to a silicon nitride modified phase change energy storage microcapsule and a preparation method thereof. Background technique [0002] In today's increasingly prominent energy and environmental issues, phase change energy storage materials (PCMs) with high energy storage density and long cycle life have attracted more and more attention. The research on phase change energy storage microcapsules (MicroPCMs) overcomes a series of problems in the application of PCMs, such as: high fluidity of liquid, easy leakage during phase change, poor compatibility with matrix materials, and low strength of microcapsules , poor thermal conductivity, etc. The application of MicroPCMs has covered various fields such as aerospace, energy-saving buildings, temperature-regulating fibers, battery management, and factory waste heat recovery, and is closely rel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K5/06B01J13/16
Inventor 唐国翌杨艳阳宋国林刘源
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap