Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Multi-walled carbon nanotube composite shape-stabilized phase change material and preparation method and application thereof

A technology of multi-walled carbon nanotubes and shape-setting phase change materials, applied in the application, heat exchange materials, chemical instruments and methods, etc., can solve the problems of insignificant cooling effect, low addition amount, volatilization leakage, etc., and achieve excellent resistance. The effect of high temperature performance, large specific surface area, and rich porous structure

Inactive Publication Date: 2020-08-18
NANTONG UNIVERSITY
View PDF10 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this study, PCMs are directly applied to cigarette filters by coating, which not only has low addition amount, insignificant cooling effect, but also may cause problems such as volatile leakage.

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
  • Multi-walled carbon nanotube composite shape-stabilized phase change material and preparation method and application thereof
  • Multi-walled carbon nanotube composite shape-stabilized phase change material and preparation method and application thereof
  • Multi-walled carbon nanotube composite shape-stabilized phase change material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0038] Preparation of EGDS / MWNT-COOHs Shaped Phase Change Material

[0039] Take 2g of MWNTs into a 500mL round bottom flask, add HNO with a volume ratio of 1:3 3 :H 2 SO 4 Mix 120mL of the solution and stir in a water bath at 50°C for 1h, then add 100mL of deionized water and 10mL of 30% H 2 o 2 solution. After ultrasonic dispersion for 1 h, it was filtered and washed with deionized water until neutral, and dried in an oven at 80 °C for 48 h to obtain acidified MWNTs, namely MWNT-COOHs.

[0040] 1.8g of EGDS and 0.9g of MWNT-COOHs were respectively placed in a 100mL round bottom flask, using 50mL of ethanol as a dispersant and stirred at 80°C for 0.5h. Add the ethanol solution of EGDS to the ethanol suspension of MWNT-COOHs, disperse with ultrasonic assistance at 80°C for 0.5h, and then stir at constant temperature at 60°C for 1h. Finally, the ethanol was removed using a rotary evaporator, and dried in an oven at 50°C for 48 hours to obtain a fine black granular solid, ...

specific Embodiment 2

[0044] Preparation of PEG6000 / PHBV / MWNTs Composite Shaped Phase Change Material Particles

[0045] 1.8g of PEG6000 was placed in a 100mL round bottom flask, and 0.45g of MWNTHs and 0.45g of PHBV were also placed in a 100mL round bottom flask, respectively using 50mL of ethanol as a dispersant and stirring at 80°C for 0.5h. The ethanol solution of PEG6000 was added to the ethanol suspension of MWNTHs and PHBV, and ultrasonically assisted to disperse at 80°C for 0.5h, and then stirred at constant temperature at 60°C for 1h. Finally, ethanol was removed using a rotary evaporator, and dried in an oven at 50°C for 48 hours to obtain a fine black granular solid, that is, a PEG6000 / PHBV / MWNTs composite shape-changing material with a mass ratio of 4:1:1 was obtained. The prepared material is crushed through a 10-20 mesh to obtain 10-20 mesh particles of PEG6000 / PHBV / MWNTs composite FSPCMs.

[0046] PEG6000 / PHBV / MWNTs composite shape-setting phase-change material particles: the test m...

specific Embodiment 3

[0048] Preparation of PA / PHBV / MWNTs Composite Shaped Phase Change Material Particles

[0049] The implementation method is the same as in the specific example 2, only the PEG6000 of the phase change material is replaced with paraffin (PA).

[0050] Application of PA / PHBV / MWNTs composite shape-setting phase-change material particles: the test method is the same as in Example 1; 10-20 purpose EGDS / EP / MNWTs composite shape-setting phase-change material particles can change the temperature of the first smoke at the filter end from the control sample The temperature of iQOS heat-not-burn cigarettes dropped from 54.7°C to 41.5°C, and the draw resistance was 0.497kPa. Compared with iQOS supporting cigarettes, the temperature of the smoke at the first filter end dropped by 13.2°C.

[0051] The leakage test of the present invention is as follows: figure 1 Photographs of the EGDS / MWNT-COOHs shape-fixed phase change material prepared for the blending method during the leak test. MWNT-C...

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

PropertyMeasurementUnit
melting pointaaaaaaaaaa
particle sizeaaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a multi-walled carbon nanotube composite shape-stabilized phase-change material capable of effectively reducing the smoke temperature of an incombustible cigarette as well asa preparation method and application thereof. The multi-walled carbon nanotube composite shape-stabilized phase change material is prepared from 16.7 to 83.3 wt% of multi-walled carbon nanotubes, 16.7 to 83.3 wt% of a phase change material and 0 to 16.7 wt% of a biodegradable material through a physical blending method. The composite shape-stabilized phase change material has excellent high-temperature resistance and the characteristic of solid-solid phase change, and can maintain a stable form at a high temperature; and the phase change material is converted from a crystalline state to an amorphous state, so that the functions of heat absorption and energy storage are realized. The multi-walled carbon nanotube has good heat-conducting properties, and the effects of quickly absorbing heatand cooling are realized.

Description

technical field [0001] The invention belongs to the technical field of shape-setting phase-change materials and heat-not-burn cigarette cooling materials, in particular to a multi-walled carbon nanotube composite shape-shape phase-change material capable of significantly reducing the temperature of heat-not-burn cigarette smoke and its preparation method and application. Background technique [0002] In the context of the continuous strengthening of global tobacco control efforts and the continuous decline in sales of traditional cigarettes, new tobacco products have emerged as the times require, and have gradually become a research and development hotspot. Among them, Philip Morris International's iQOS is the representative of the electric heating heat-not-burn cigarette (HNB) product As a representative, smoke is produced by heating tobacco, the process does not burn, low tar, low second-hand smoke release, coupled with a real smoking experience, it is favored by the majori...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06A24F40/40A24D3/17
CPCA24D3/17A24F40/40C09K5/063
Inventor 缪建文李敏敏宋国华夏杰王燕
Owner NANTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com