具有高分散稳定性的磷酸锆悬浮液的液固相变循环性能

doi:10.11896/cldb.201906001

材料导报

2019, Vol. 33

Issue (6): 919-922 https://doi.org/10.11896/cldb.201906001

无机非金属及其复合材料

具有高分散稳定性的磷酸锆悬浮液的液固相变循环性能

莫松平¹, 郑麟¹, 袁潇¹, 林潇晖¹, 潘婷¹, 贾莉斯¹, 陈颖¹, 成正东^1,2

1 广东工业大学材料与能源学院,广东省功能软凝聚态物质重点实验室,广州 510006
2 德州农工大学化工系,美国德州大学城 77843-3122

Liquid-solid Phase Change Cycling Performance of Zirconium Phosphate Suspensions with High Dispersion Stability

MO Songping¹, ZHENG Lin¹, YUAN Xiao¹, LIN Xiaohui¹, PAN Ting¹, JIA Lisi¹, CHEN Ying¹, CHENG Zhengdong^1,2

1 Guangdong Provincial Key Laboratory on Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006
2 Artie McFerrin Department of Chemical Engineering, Texas A & M University, College Station, Texas 77843-3122, USA

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摘要由于纳米颗粒有聚集和沉降的倾向,纳米悬浮液作为一种相变材料,其液固相变循环稳定性与其冷冻/熔化性能一样重要,然而相关研究却很少。本研究将具有高分散稳定性的磷酸锆(ZrP)碟片悬浮液作为一种新型相变材料,并将其冷冻/熔化性能和循环稳定性与水和石墨烯纳米悬浮液进行比较。实验结果表明:所有样品的过冷度随着冷冻/熔化循环次数的增加而减少;在相同次数的冷冻/熔化循环中,ZrP和石墨烯纳米悬浮液的过冷度比水低,且粒子浓度较大的纳米悬浮液过冷度较小。分析表明,ZrP和石墨烯纳米片和冰晶均可诱导纳米悬浮液中的成核。与石墨烯纳米悬浮液相比,ZrP纳米悬浮液的过冷度在粒子质量浓度为0.1%时较大,但在质量浓度为1.0%时较小。比较两种纳米悬浮液经过冷冻/熔化循环后的分散稳定性,结果表明,与石墨烯纳米悬浮液相比,ZrP纳米悬浮液具有更好的液固相变循环稳定性,因而能更有效减小过冷度。

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	莫松平
	郑麟
	袁潇
	林潇晖
	潘婷
	贾莉斯
	陈颖
	成正东

关键词: 相变材料纳米悬浮液循环稳定性磷酸锆石墨烯

Abstract: Liquid-solid phase change cycling stability is as important as its freezing/melting performance for nanosuspensions as phase change mate-rials, because nanoparticles tend to aggregate and settle down. However, it has been rarely studied. In this study, zirconium phosphate (ZrP) nanosuspensions with high dispersion stability is proposed as a novel phase change material. Its freezing/melting performance and cycling stability were compared with water and graphene (GN) nanosuspensions. Results showed that the subcooling degree (SD) of all the samples decreased with increased freezing/melting cycle. At the same freezing/melting cycle, the SD of the ZrP and GN nanosuspensions were reduced compared with water. The nanosuspensions with higher nanoparticle concentration exhibited lower SD. The results suggested that both the ZrP and GN nanoplatelets and ice crystals could induce nucleation in the nanosuspensions. In comparison with the GN nanosuspensions, the SD of the ZrP nanosuspensions was higher at 0.1wt% but lower at 1.0wt% particle concentration. Dispersion stabilities of both nanosuspensions after freezing/melting cycles were then compared. Results showed that compared with the GN nanosuspensions, the ZrP nanosuspensions had higher dispersion stability, thus were able to reduce SD more effectively.

Key words: phase change material nanosuspension cycling stability zirconium phosphate graphene

发布日期: 2019-04-03

ZTFLH:

TK124

基金资助: 国家自然科学基金(51576050);广东省公益研究与能力建设专项(2015A010106013);广州市科技计划项目(201704030107;2016201604030063)

作者简介: 莫松平,广东工业大学副教授,硕士研究生导师,获中国科学技术大学学士和博士学位,2016年8月—2017年7月国家公派美国德州农工大学访问学者。

引用本文:

莫松平, 郑麟, 袁潇, 林潇晖, 潘婷, 贾莉斯, 陈颖, 成正东. 具有高分散稳定性的磷酸锆悬浮液的液固相变循环性能[J]. 材料导报, 2019, 33(6): 919-922.
MO Songping, ZHENG Lin, YUAN Xiao, LIN Xiaohui, PAN Ting, JIA Lisi, CHEN Ying, CHENG Zhengdong. Liquid-solid Phase Change Cycling Performance of Zirconium Phosphate Suspensions with High Dispersion Stability. Materials Reports, 2019, 33(6): 919-922.

链接本文:

http://www.mater-rep.com/CN/10.11896/cldb.201906001 或 http://www.mater-rep.com/CN/Y2019/V33/I6/919

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