高时空分辨率研究海盐液滴快速风化过程

引用本文: 仝海杰, 钱正纲, REID Jonathan P., 张韫宏. 高时空分辨率研究海盐液滴快速风化过程[J]. 物理化学学报, 2011, 27(11): 2521-2527. doi: 10.3866/PKU.WHXB20111121 shu

Citation: TONG Hai-Jie, QIAN Zheng-Gang, REID Jonathan P., ZHANG Yun-Hong. High Temporal and Spatial Resolution Measurements of the Rapid Efflorescence of Sea Salt Droplets[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2521-2527. doi: 10.3866/PKU.WHXB20111121 shu

高时空分辨率研究海盐液滴快速风化过程

基金项目:
国家自然科学基金(20933001, 20873006)资助项目 (20933001, 20873006)

摘要: 以高速摄像仪与显微拉曼光谱联用研究聚四氟(疏水)乙烯基底和石英(亲水)基底上的单个海水液滴的快速风化过程. 海水液滴风化的形貌图像达到毫秒时间分辨率和微米空间分辨率. 通入干氮气后海水液滴在石英基底上发生快速风化过程, 首先析出Na₂Ca₅(SO₄)₆·3H₂O和Na_2xCa_6-x(SO₄)₆·3H₂O (0<x<1)晶体, 然后析出NaCl 晶体, 最后析出KMgCl₃·6H₂O晶体. 我们发现在快速降低湿度的过程中析出钙钠复盐, 在缓慢降低湿度的过程中析出CaSO₄·2H₂O, 并已经确定各种结晶产物的位置以及Na₂Ca₅(SO₄)₆·3H₂O和CaSO₄·2H₂O两种晶体的生长速率, 并在聚四氟乙烯基底上观察到中空结构的海盐颗粒.

关键词:

海盐
/ 高速摄像
/ 拉曼光谱
/ 风化
/ 相对湿度

English

High Temporal and Spatial Resolution Measurements of the Rapid Efflorescence of Sea Salt Droplets

1.
1. Institute of Chemical Physics, Key Laboratory of Cluster Science, Beijing Institute of Technology, Beijing 100081, P. R. China;
2. School of Chemistry, University of Bristol, Bristol, BS8 1TS, UK
Received Date: 02 June 2011
Available Online: 27 October 2011
Fund Project:
国家自然科学基金(20933001, 20873006)资助项目

Abstract: The rapid efflorescence of individual seawater droplets on polytetrafluoroethylene (PTFE, hydrophobic) and quartz (hydrophilic) substrates was investigated using a high-speed camera for imaging and micro-Raman spectroscopy to spatially resolve the particle composition. The morphology of the evaporating sea salt particles was captured using millisecond time resolution and micrometer spatial resolution. Upon rapid desiccation with dry N₂ on a quartz substrate, Na₂Ca₅(SO₄)₆·3H₂O and Na_2xCa_6-x(SO₄)₆· 3H₂O (0<x<1) crystallized first followed by NaCl and finally KMgCl₃·6H₂O. We determined the formation behavior of the mixed sodium-calcium salts as crystallization products during the quick desiccation process and CaSO₄·2H₂O during the slow desiccation process. In addition, the crystallization location of different crystal products were identified and the growth speed of Na₂Ca₅(SO₄)₆·3H₂O crystal was compared with that of CaSO₄·2H₂O crystal. Moreover, sea salt particles with a hollow structure were observed on the PTFE substrate at the end of the quick efflorescence process.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

高时空分辨率研究海盐液滴快速风化过程

English

High Temporal and Spatial Resolution Measurements of the Rapid Efflorescence of Sea Salt Droplets

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

高时空分辨率研究海盐液滴快速风化过程

English

High Temporal and Spatial Resolution Measurements of the Rapid Efflorescence of Sea Salt Droplets

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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