Preparation and performance of sodium acetate trihydrate/formamide composite phase change material

FANG Yutang; JIN Ce; LIANG Xianghui; GAO Xuenong; ZHANG Zhengguo

doi:10.11949/j.issn.0438-1157.20150687

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Preparation and performance of sodium acetate trihydrate/formamide composite phase change material

更新时间：2025-12-10

- Preparation and performance of sodium acetate trihydrate/formamide composite phase change material
- CIESC Journal Issue 12, Pages: 5142-5148(2015)
- 作者机构：
  
  华南理工大学传热强化与过程节能教育部重点实验室,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150687
  CLC： Q110.1TK02
- Online First：05 December 2015，
  
  Published：05 December 2015
- 稿件说明：
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FANG Yutang, JIN Ce, LIANG Xianghui, et al. Preparation and performance of sodium acetate trihydrate/formamide composite phase change material[J]. CIESC Journal, 2015, (12): 5142-5148.
DOI：

FANG Yutang, JIN Ce, LIANG Xianghui, et al. Preparation and performance of sodium acetate trihydrate/formamide composite phase change material[J]. CIESC Journal, 2015, (12): 5142-5148. DOI： 10.11949/j.issn.0438-1157.20150687.

摘要

以甲酰胺(FA)为改性剂

采用熔融共混法对三水醋酸钠(SAT)进行改性得到新型SAT/FA复合相变材料(CPCM)。探讨FA质量分数(下同)对SAT/FA共混物(基体)相变焓及相变温度的影响。利用熔融-固化循环及步冷曲线

系统探讨成核剂、增稠剂对复合材料相分离、过冷度及放热性能的影响。对新型SAT/FA CPCM的结构及性能进行XRD 、FTIR及DSC表征。结果显示:添加25%的FA于SAT中可形成SAT/FA低共融体;添加2% 十二水磷酸氢二钠成核剂和2%聚乙烯醇增稠剂形成的CPCM

过冷度低(2.67℃)

放热时间长(10170 s)

循环稳定性好

相变焓高达233.9 kJ·kg-1

相变温度40.88 ℃。可应用于相变蓄热地板辐射采暖。

Abstract

Formamide (FA) as modifier

a novel sodium acetate trihydrate (SAT)/formamide (FM) composite phase change material (CPCM) was prepared by melt blending method. The influence of the formamide mass fraction (the same as below) on the phase change enthalpy and the temperature of SAT/FA mixture (matrix) was discussed. The effects of nucleating agent and thickening agent on the phase separation

the degree of supercooling and the release time of composite material were systematically investigated by melting-solidification cycle and step cooling curve. The structure and performance of novel CPCM were characterized by FTIR

XRD and DSC. The results showed that the SAT/FA eutectic mixture formed by adding 25% formamide into SAT. The SAT/FA CPCM formed by adding 2% disodium hydrogen phosphate dodecahydrate (DSP) as the nuclear agent and 2% polyvinyl alcohol (PVA) as thickening agent

had a low degree of supercooling (2.67℃)

long heat release time (10170 s) and excellent cycling stability. Its phase change enthalpy and temperature were 233.9 kJ·kg-1 and 40.88℃

respectively

indicating that it can be applied to floor radiant heating with phase change thermal storage.

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