Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 96: Issue 3
Gelled Na2HPO4 · 12H2O with amylose-g-sodium acrylate: heat storage performance, heat capacity and heat of fusion
Authors: X.-Z. Lan 1 , Z.-C. Tan 2 , Q. Shi 2 , and Z.-H. Gao 3
View More View Less
  • 1 College of Chemistry and Materials Science, Shandong Agricultural University, 271018 Taian, China
  • | 2 China Ionic Liquid Laboratory and Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China
  • | 3 Department of Chemistry, Binzhou Medical College, 264003 Yantai, China
Pages:
1035–1040
Online Publication Date:
10 Jun 2009
Publication Date:
01 Jun 2009
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-009-0053-0
Keywords:
Gelling method; Na2HPO4 · 12H2O; Phase change material; Phase separation
Restricted access

Abstract  

A novel gelling method was studied to stabilize phase change material Na2HPO4 · 12H2O with amylose grafted sodium acrylate. Gelled Na2HPO4 · 12H2O shows stable heat storage performance prepared at optimized conditions: 2.7mass/mass% sodium acrylate, 0.4 mass/mass% amylose, 0.05–0.09 mass/mass% N, N′-methylenebisacrylamide, 0.05–0.09 mass/mass% K2S2O8 and Na2SO3 (mass ratio 1:1), at 50 °C. Na2HPO4 · 12H2O was dispersed in gel network as tiny crystals less than 0.1 mm. Melting points were in the range 35.4 ± 2 °C. Short-term thermal cycling proves the effectiveness of the novel method for eliminating phase separation in the gelled salt. Adiabatic calorimetric measurement of heat capacities shows two phase transitions, which correspond to melting of Na2HPO4 · 12H2O and freezable bond water in gel, respectively. Heat of fusion of pure Na2HPO4 · 12H2O was determined as 260.9 J g−1. Distribution of extra water is: free water:freezable water:nonfreezing water = 0:0.85:0.15.

Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

To see the editorial board, please visit the website of Springer Nature.

Manuscript Submission: HERE

For subscription options, please visit the website of Springer Nature.

Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

Monthly Content Usage

Abstract Views Full Text Views PDF Downloads
Jan 2022 1 0 0
Feb 2022 1 0 0
Mar 2022 1 0 0
Apr 2022 1 1 0
May 2022 0 0 0
Jun 2022 0 0 0
Jul 2022 0 0 0