Experimental Study of Gravitation Effects on Liquid Crystal Phase Transitions in Polydisperse Aqueous Suspensions of Mg Al-2 Layered Double Hydroxide
文献类型：期刊论文
| 作者 | Chen Y; Zhang L ; Sun DJ; Sun ZW(孙址伟); Xu SH(徐升华)
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| 刊名 | MICROGRAVITY SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2016 |
| 卷号 | 28期号:2页码:95-100 |
| 通讯作者邮箱 | djsun@sdu.edu.cn |
| 关键词 | Thermocapillary convection Cylindrical annulus Payload Space experiment Microgravity fluid physics |
| ISSN号 | 0938-0108 |
| 产权排序 | [Chen, Yun; Zhang, Li; Sun, Dejun] Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China; [Sun, Zhiwei; Xu, Shenghua] Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Beijing 100190, Peoples R China |
| 通讯作者 | Sun, DJ (reprint author), Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China. |
| 中文摘要 | Effects of gravity on liquid crystal phase transitions (LCPT) in polydisperse aqueous suspensions of Mg Al-2 layered double hydroxide (LDHs) were studied under normal gravity condition. Samples with different suspension concentration (SC) were tested for 15 days and the relevant changes in samples were observed through crossed polarizers. Our results showed: (a) the samples were still isotropic (I) when SC < 23 wt%; (b) when 23 wt% < SC < 30 wt%, a shear-induced birefringence appeared after preparation, and finally coexistence of four phases was reached, including an opaque isotropic top phase, a birefringent middle phase, a faint birefringence phase and a sediment layer of larger platelets resulting from the high polydispersity; (c) when SC > 30 wt%, the suspensions were in a gel state, and the gel network slowed down the LCPT. The above different behavior of phase transitions is apparently due to the concentration gradient and fractionation caused by gravity. This study provides guidance on how to select samples of LDHs suspensions for LCPT used in the upcoming experiment in the space program SJ-10 satellite. |
| 分类号 | 二类 |
| 类目[WOS] | Engineering, Aerospace ; Thermodynamics ; Mechanics |
| 研究领域[WOS] | Engineering ; Thermodynamics ; Mechanics |
| 关键词[WOS] | Thermocapillary convection ; Cylindrical annulus ; Payload ; Space experiment ; Microgravity fluid physics |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1007/s12217-015-9477-2 |
| 语种 | 英语 |
| WOS记录号 | WOS:000376652000003 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/59560]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 推荐引用方式 GB/T 7714 | Chen Y,Zhang L,Sun DJ,et al. Experimental Study of Gravitation Effects on Liquid Crystal Phase Transitions in Polydisperse Aqueous Suspensions of Mg Al-2 Layered Double Hydroxide[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2016,28(2):95-100. |
| APA | Chen Y,Zhang L,Sun DJ,孙址伟,&徐升华.(2016).Experimental Study of Gravitation Effects on Liquid Crystal Phase Transitions in Polydisperse Aqueous Suspensions of Mg Al-2 Layered Double Hydroxide.MICROGRAVITY SCIENCE AND TECHNOLOGY,28(2),95-100. |
| MLA | Chen Y,et al."Experimental Study of Gravitation Effects on Liquid Crystal Phase Transitions in Polydisperse Aqueous Suspensions of Mg Al-2 Layered Double Hydroxide".MICROGRAVITY SCIENCE AND TECHNOLOGY 28.2(2016):95-100. |
入库方式： OAI收割
来源：力学研究所
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