Nano refrigerant hydrate phase change cold-storage working substance and preparation thereof
A phase change cold storage and refrigerant technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of mixing degree influence, thermodynamic instability, and difficulty in uniform distribution of additives.
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Examples
Embodiment 1
[0025] Embodiment 1: first sodium dodecyl sulfate (SDS) is dissolved in water, and the obtained SDS aqueous solution that contains mass percent concentration is 10%; Then lecithin is dissolved in the refrigerant R141b, obtained contains mass percent The R141b solution of lecithin with a concentration of 5% was added dropwise to the aqueous solution of SDS at a mass ratio of 1:100 in a water bath at 20°C, and the solution was stirred until the solution changed from turbid to transparent. Put the test tube containing the above-mentioned clear solution into a constant temperature bath at 0.8°C, and figure 1 The hydrate formation curve shows that the temperature for hydrate formation is 2°C, that is, the degree of supercooling is 6.4°C, and the required induction time is 23.5 minutes. The reaction speed is faster.
Embodiment 2
[0026] Embodiment 2: 1) at first surfactant cetyl trimethyl ammonium bromide (CTAB) and auxiliary surfactant butanol are dissolved in water, the aqueous solution of making surfactant, the quality of this surfactant is 100% Sub-concentration is the maximum solubility of the surfactant in water, and the mass percentage concentration of the co-surfactant is the maximum solubility of the co-surfactant in water;
[0027] 2) Then CCIF 2 CCIF 2 Add (R114) dropwise into the aqueous solution of surfactant, stir until the solution turns from turbid to clear, its dissolution temperature is 0.1°C to below the normal boiling point of the refrigerant, and the mass ratio of the refrigerant solution to the aqueous surfactant solution is 1 : 100.
Embodiment 3
[0028] Embodiment 3: 1) firstly, surfactant carboxylate type ammonium oleic acid triacetate was dissolved in water to obtain an aqueous solution of surfactant, and the mass percent concentration of the surfactant was 8%;
[0029] 2) Then CHF 2 -O-CHF 2 (RE134) is added dropwise into the aqueous solution of surfactant, and stirred until the solution turns from turbid to clear, and its dissolution temperature is 0.1°C to below the normal boiling point of the refrigerant, and the mass ratio of refrigerant solution to the aqueous solution of surfactant is refrigeration Until the mixed transparent or translucent system of the surfactant solution and the aqueous solution of the surfactant starts to appear turbid.
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Application Information
- IPC
- C09K5/06
- CPC
- Y02E60/147; Y02E60/14
- Inventors
- 李娜; 覃小焕