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题名: Gelled Na2HPO4 center dot A 12H(2)O with amylose-g-sodium acrylate: heat storage performance, heat capacity and heat of fusion
作者: Lan, X. -Z.2;  Tan, Z. -C.1;  Shi, Q.1;  Gao, Z. -H.3
关键词: Gelling method ;  Na2HPO4 ;  12H(2)O ;  Phase change material ;  Phase separation
刊名: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
发表日期: 2009-06-01
DOI: 10.1007/s10973-009-0053-0
卷: 96, 期:3, 页:1035-1040
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Analytical ;  Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: A novel gelling method was studied to stabilize phase change material Na2HPO4 center dot A 12H(2)O with amylose grafted sodium acrylate. Gelled Na2HPO4 center dot A 12H(2)O 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 A degrees C. Na2HPO4 center dot A 12H(2)O was dispersed in gel network as tiny crystals less than 0.1 mm. Melting points were in the range 35.4 +/- A 2 A degrees 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 center dot A 12H(2)O and freezable bond water in gel, respectively. Heat of fusion of pure Na2HPO4 center dot A 12H(2)O was determined as 260.9 J g(-1). Distribution of extra water is: free water:freezable water:nonfreezing water = 0:0.85:0.15.
关键词[WOS]: THERMAL-ENERGY STORAGE ;  PHASE-CHANGE MATERIALS ;  THERMODYNAMIC PROPERTIES ;  STABILIZATION ;  PREVENTION ;  STATES ;  WATER ;  SALT
语种: 英语
WOS记录号: WOS:000268583900050
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141329
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, China Ion Liquid Lab & Thermochem Lab, Dalian 116023, Peoples R China
2.Shandong Agr Univ, Coll Chem & Mat Sci, Tai An 271018, Shandong, Peoples R China
3.Binzhou Med Coll, Dept Chem, Yantai 264003, Peoples R China

Recommended Citation:
Lan, X. -Z.,Tan, Z. -C.,Shi, Q.,et al. Gelled Na2HPO4 center dot A 12H(2)O with amylose-g-sodium acrylate: heat storage performance, heat capacity and heat of fusion[J]. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY,2009,96(3):1035-1040.
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