Hydrous salt cold storage agent with phase-transition temperature of 5-8 DEG C and preparation method thereof

A technology of phase change temperature and cold storage agent, which is applied in the field of packaging materials, can solve the problems of low latent heat of phase change, high cost of use, and not easy to flow out, and achieve good cold storage effect, solve the problem of phase separation, and large latent heat of phase change.

Inactive Publication Date: 2015-11-11
JIANGNAN UNIV
View PDF7 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing problems of cold storage agents in the same temperature range on the market, such as low latent heat of phase change, complex preparation process and high use cost, the present inventi

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The specific components and mass ratio are: 8.0g of sodium sulfate decahydrate hydrate, 0.25g of borax, 0.25g of boric acid, 0.15g of superabsorbent resin, 0.1g of fumed white carbon black, and 0.5g of potassium chloride and 0.75g of ammonium chloride, 0.01g of sodium hexametaphosphate, and free water with a molar ratio of 1:1 to sodium sulfate decahydrate, stirred evenly at 36° C., and cooled to obtain a gel-like hydrated salt cool storage agent.

[0022] The phase transition temperature of the prepared cold storage agent is 6.5°C, and the latent heat of phase transition is 125.6 J / g.

Embodiment 2

[0024] The specific components and mass ratio are: 7.5g of sodium sulfate decahydrate hydrate, 0.25g of borax, 0.25g of boric acid, 0.15g of superabsorbent resin, 0.1g of fumed white carbon black, and 0.85g of potassium chloride and 0.9g of ammonium chloride, 0.03g of sodium hexametaphosphate, and free water with a molar ratio of 1:1 to sodium sulfate decahydrate, stirred evenly at 38° C., and cooled to obtain a gel-like hydrated salt cool storage agent.

[0025] The phase transition temperature of the prepared cold storage agent is 5.3°C, and the latent heat of phase transition is 121.9 J / g.

Embodiment 3

[0027] The specific components and mass ratio are: 8.5g of sodium sulfate decahydrate hydrate, 0.25g of borax, 0.25g of boric acid, 0.15g of superabsorbent resin, 0.1g of fumed white carbon black, and 0.15g of potassium chloride and 0.6g of ammonium chloride, 0.05g of sodium hexametaphosphate, and free water with a molar ratio of 1:1 to sodium sulfate decahydrate, stirred evenly at 40° C., and cooled to obtain a gel-like hydrated salt cool storage agent.

[0028] The phase transition temperature of the prepared cold storage agent is 7.7°C, and the latent heat of phase transition is 135.1 J / g.

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
Phase transition temperatureaaaaaaaaaa
Latent heat of phase changeaaaaaaaaaa
Phase transition temperatureaaaaaaaaaa
Login to view more

Abstract

The invention relates to a hydrous salt cold storage agent with the phase-transition temperature of 5-8 DEG C and a preparation method thereof. The cold storage agent comprises the following components in percentage by weight: 68.5-86.9% of a main energy storage agent, 1-3% of a supercooling prevention agent, 1-3% of an acid and alkali neutralizer, 1-5% of a thickening agent, 10-20% of a cooling agent, 0.1-0.5% of a crystal habit modifier and free water having the same molar ratio as that of sodium sulfate decahydrate. The phase-transition temperature of the cold storage agent can be adjusted in the range of 5-8 DEG C, the latent heat of phase change ranges from 20.0 J/g to 140 J/g, and the cold storage agent is long in cold-keeping time, simple in preparation process, low in cost, non-toxic, odourless, pollution-free and gelatinous and can be widely used for cold-chain transportation of fruits and vegetables, biomedical products and the like.

Description

technical field [0001] The invention relates to a hydrated salt cold storage agent, which is suitable for the cold chain transportation of fruits, vegetables, food, etc. and the low temperature protection of biomedical products. The invention also relates to a preparation method of a hydrated salt cold storage agent, which belongs to the technical field of packaging materials. Background technique [0002] At present, the application of cold storage technology is mostly concentrated in the fields of air conditioning and cold storage. However, with the rapid development of the economy and the continuous improvement of people's living standards, consumers' demand for fresh, high-quality and frozen processed food is increasing. In the process of cold chain transportation, a cold storage agent at a suitable temperature is also required to cool and keep the product fresh, thereby prolonging the shelf life of the product and reducing the loss before consumption. [0003] However,...

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): C09K5/08
Inventor 卢立新梁田蔡莹丘晓琳
Owner JIANGNAN 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