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Polypyrrole coated low-carbon alkane cold storage material and preparation method thereof

A technology for low-carbon alkanes and cold storage materials, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of not making fundamental breakthroughs, and achieve the effects of convenient preparation process, convenient packaging and simple preparation process.

Inactive Publication Date: 2018-07-13
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such research has not yet achieved a fundamental breakthrough

Method used

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  • Polypyrrole coated low-carbon alkane cold storage material and preparation method thereof

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Embodiment 1

[0023] (1) The aqueous solution of sodium carboxymethyl cellulose with a mass fraction of 1%, the aqueous solution of sodium polyacrylate with a mass fraction of 1%, and the aqueous solution of polyvinyl alcohol with a mass fraction of 1% are 20:20:1 by volume, at room temperature Stir and mix evenly to obtain A solution;

[0024] (2) Slowly add low-carbon alkanes dropwise to solution A, and stir at room temperature for 1 hour to obtain solution B. Described low-carbon alkane is n-tridecane; The volume ratio of described n-tridecane and A solution is 1:2;

[0025] (3) Add a certain amount of diatomaceous earth to the mixed solution of thioglycolic acid and ethanol, stir at 60°C for 8 hours, filter, wash with industrial alcohol, and dry spontaneously at room temperature to obtain powder C. The mass fraction of thioglycolic acid in the mixed solution of thioglycolic acid and ethanol is 2%; the mass ratio of the mixed solution of thioglycolic acid and ethanol to diatomaceous ear...

Embodiment 2

[0031] (1) The aqueous solution of sodium carboxymethyl cellulose that is 2% by mass fraction, the aqueous solution of sodium polyacrylate and the aqueous solution of polyvinyl alcohol that are 2% by mass fraction are 20:20:1 by volume, room temperature Stir and mix evenly to obtain A solution;

[0032] (2) Slowly add low-carbon alkanes dropwise to solution A, and stir at room temperature for 1 hour to obtain solution B. Described lower carbon alkane is n-tetradecane; The volume ratio of described n-tetradecane and A solution is 1:2;

[0033] (3) Add a certain amount of diatomaceous earth to the mixed solution of thioglycolic acid and ethanol, stir at 60°C for 8 hours, filter, wash with industrial alcohol, and dry spontaneously at room temperature to obtain powder C. The mass fraction of thioglycolic acid in the mixed solution of thioglycolic acid and ethanol is 2%; the mass ratio of the mixed solution of thioglycolic acid and ethanol to diatomaceous earth is 20:1.

[0034] ...

Embodiment 3

[0039] (1) The aqueous solution of sodium carboxymethyl cellulose with a mass fraction of 1.5%, the aqueous solution of sodium polyacrylate with a mass fraction of 1.8%, and the aqueous solution of polyvinyl alcohol with a mass fraction of 1.5%, in a volume ratio of 20:20:1, at room temperature Stir and mix evenly to obtain A solution;

[0040] (2) Slowly add low-carbon alkanes dropwise to solution A, and stir at room temperature for 1 hour to obtain solution B. Described low-carbon alkane is the mixture (mass ratio is 1:1) that is n-tridecane and n-tetradecane; The volume ratio of described low-carbon alkane and A solution is 1:2;

[0041] (3) Add a certain amount of diatomaceous earth to the mixed solution of thioglycolic acid and ethanol, stir at 60°C for 8 hours, filter, wash with industrial alcohol, and dry spontaneously at room temperature to obtain powder C. The mass fraction of thioglycolic acid in the mixed solution of thioglycolic acid and ethanol is 2%; the mass ra...

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Abstract

The invention provides a polypyrrole coated low-carbon alkane cold storage material and a preparation method thereof and belongs to the technical field of phase-change cold storage materials. A specific preparation process of the cold storage material comprises the following steps: firstly, mixing sodium carboxymethyl cellulose, sodium polyacrylate and a polyvinyl alcohol water solution; then slowly dropwise adding low-carbon alkane to form a mixed solution; finally, adding diatomite, a pyrrole monomer and an ammonium persulfate solution in sequence; washing and filtering, and drying at 40 DEGC to obtain the polypyrrole coated low-carbon alkane cold storage material. The cold storage material is of a black powder shape; the phase change temperature is 4.6 to 6.8 DEG C and the phase changelatent heat is about 135 to 158KJ / Kg, so that leakage can be prevented in a utilization process; the temperature of transported logistics can be within a range of 2 to 8 DEG C in certain time in a distribution process, and the cold storage material is suitable for cold-chain transportation industries of medicines including vaccines and the like. The polypyrrole coated low-carbon alkane cold storage material has the advantages of convenient preparation process and simple technology and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of phase-change cold storage materials, and in particular relates to a polypyrrole-coated low-carbon alkane cold storage material and a preparation method thereof. Background technique [0002] Phase change energy storage is an energy storage technology developed on the premise of using phase change materials, which has the advantages of high energy storage density, energy release and stable temperature. The core of this technology is a phase-change cold storage agent (Wu Zihong et al., a cold storage agent for ice packs, patent application number: CN201410332294.8). [0003] As the most populous country in the world, China needs to consume a large amount of temperature-sensitive biological items such as blood and vaccines every day. The transportation of these biological items requires a large amount of cooling agent with a phase transition temperature of 2-8°C. After the Shandong vaccine incident in 2016 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/066Y02E60/14
Inventor 夏友谊刘小辉
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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