中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 会议论文
学科主题: 物理化学
题名: Stability of Heat Storage Capacity for Phase Change Material Na2HPO4.12 H2O Thickening And Gelling Methods
作者: Lan XZ(蓝孝征) ;  Tan ZC(谭志诚) ;  孙立贤等
会议名称: 18th IUPAC Conference on Chemical Thermodynamics and The 12th National Conference on Chemical Thermodynamics and Thermal Analysis
会议日期: 2004-8-17
出版日期: 2004-08-17
会议地点: 中国
通讯作者: 蓝孝征
部门归属: 十五室
主办者: 中国化学会
摘要: Disodium hydrogen phosphate dodecahydrates (Na2HPO4×12H2O) is a candidate phase change material with a heat of fusion 260~280 J/g. But its melting process is incongruent which leads to continuous lowering of heat storage capacity during thermal cycling. Adding thickening agent or in-situ synthesizing polyelectrolyte, e.g. polyacrylate, to its melt can help to prevent the phase separation to some extent. Heat of fusion of pure Na2HPO4×12H2O decreased from ~200 J/g to ~25 J/g in a four-time freeze-thaw cycling. A rubbery mixture containing sodium alginate 3-5%(w/w), Na2HPO4×12H2O and a certain amount of water shows constant heat storage capacity in five times thermal cycles. A gel was obtained through polymerizing of sodium acrylate in the melt of Na2HPO4×12H2O and water at 50℃. Solid dodecahydrates salt with the in-vivo synthesized polyacrylate sodium exhibited stable heat of fusion. Optimum components for the synthesis of polyacrylate sodium to obtain the gel-like product composed of sodium acrylate 3-5%(w/w) with pH=7, N,N’-methylenebisacrylamide 0.1-0.2%(w/w), K2S2O8 and Na2SO3(mass ratio 1:1) 0.06-0.12%(w/w). Solid gelled hydrate with crystal size less than 0.2mm possesses stable thermal storage property. TG analysis of pure and gelled Na2HPO4×12H2O presented a different thermal stability.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/111788
Appears in Collections:中国科学院大连化学物理研究所_会议论文

Files in This Item:

There are no files associated with this item.


Recommended Citation:
Lan XZ,Tan ZC,孙立贤等. Stability of Heat Storage Capacity for Phase Change Material Na2HPO4.12 H2O Thickening And Gelling Methods[C]. 见:18th IUPAC Conference on Chemical Thermodynamics and The 12th National Conference on Chemical Thermodynamics and Thermal Analysis. 中国. 2004-8-17.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [蓝孝征]'s Articles
 [谭志诚]'s Articles
 [孙立贤等]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [蓝孝征]‘s Articles
 [谭志诚]‘s Articles
 [孙立贤等]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace