Soft Glassy Colloidal Arrays in an Ionic Liquid: Colloidal Glass Transition, Ionic Transport, and Structural Color in Relation to Microstructure

2010 ◽  
Vol 114 (41) ◽  
pp. 13095-13103 ◽  
Author(s):  
Kazuhide Ueno ◽  
Yuta Sano ◽  
Aya Inaba ◽  
Masashi Kondoh ◽  
Masayoshi Watanabe
Keyword(s):  
Ionic Liquid ◽  
Glass Transition ◽  
Ionic Transport ◽  
Structural Color ◽  
Colloidal Arrays ◽  
Colloidal Glass

A Novel Poly(Ionic Liquid) as the Thermal Insulating Material

2020 ◽  
Vol 13 (3) ◽  
pp. 241-247
Author(s):  
Wenxin Wei ◽  
Guifeng Ma ◽  
Hongtao Wang ◽  
Jun Li
Keyword(s):  
Thermal Conductivity ◽  
Ionic Liquid ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Flame Resistance ◽  
Insulating Material ◽  
Low Thermal Conductivity ◽  
Thermal Insulating ◽  
Poly Ionic Liquid

Objective: A new poly(ionic liquid)(PIL), poly(p-vinylbenzyltriphenylphosphine hexafluorophosphate) (P[VBTPP][PF6]), was synthesized by quaternization, anion exchange reaction, and free radical polymerization. Then a series of the PIL were synthesized at different conditions. Methods: The specific heat capacity, glass-transition temperature and melting temperature of the synthesized PILs were measured by differential scanning calorimeter. The thermal conductivities of the PILs were measured by the laser flash analysis method. Results: Results showed that, under optimized synthesis conditions, P[VBTPP][PF6] as the thermal insulator had a high glass-transition temperature of 210.1°C, high melting point of 421.6°C, and a low thermal conductivity of 0.0920 W m-1 K-1 at 40.0°C (it was 0.105 W m-1 K-1 even at 180.0°C). The foamed sample exhibited much low thermal conductivity λ=0.0340 W m-1 K-1 at room temperature, which was comparable to a commercial polyurethane thermal insulating material although the latter had a much lower density. Conclusion: In addition, mixing the P[VBTPP][PF6] sample into polypropylene could obviously increase the Oxygen Index, revealing its efficient flame resistance. Therefore, P[VBTPP][PF6] is a potential thermal insulating material.

scholarly journals Universal behavior of the osmotically compressed cell and its analogy to the colloidal glass transition

2009 ◽  
Vol 106 (26) ◽  
pp. 10632-10637 ◽  
Author(s):  
E. H. Zhou ◽  
X. Trepat ◽  
C. Y. Park ◽  
G. Lenormand ◽  
M. N. Oliver ◽  
...  
Keyword(s):  
Glass Transition ◽  
Universal Behavior ◽  
Colloidal Glass

Effect of Concentration on the Glass Transition and Viscoelastic Properties of Poly(methyl methacrylate)/Ionic Liquid Solutions

2011 ◽  
Vol 44 (4) ◽  
pp. 1016-1025 ◽  
Author(s):  
Michelle M. Mok ◽  
Xingcheng Liu ◽  
Zhifeng Bai ◽  
Yu Lei ◽  
Timothy P. Lodge
Keyword(s):  
Ionic Liquid ◽  
Glass Transition ◽  
Methyl Methacrylate ◽  
Viscoelastic Properties ◽  
Poly Methyl Methacrylate ◽  
Liquid Solutions

Observation of the Pinning-Induced Crystal-Hexatic-Glass Transition in Two-Dimensional Colloidal Suspensions

2021 ◽  
Vol 38 (10) ◽  
pp. 106101
Author(s):  
Xiaoyan Sun ◽  
Huaguang Wang ◽  
Hao Feng ◽  
Zexin Zhang ◽  
Yuqiang Ma
Keyword(s):  
Glass Transition ◽  
Colloidal Suspensions ◽  
Two Dimensional ◽  
Colloidal Systems ◽  
Fundamental Understanding ◽  
New Strategy ◽  
Glassy Materials ◽  
Colloidal Glass ◽  
Orientational Correlation

Identification of the glass formation process in various conditions is of importance for fundamental understanding of the mechanism of glass transitions as well as for developments and applications of glassy materials. We investigate the role of pinning in driving the transformation of crystal into glass in two-dimensional colloidal suspensions of monodisperse microspheres. The pinning is produced by immobilizing a fraction of microspheres on the substrate of sample cells where the mobile microspheres sediment. Structurally, the crystal-hexatic-glass transition occurs with increasing the number fraction of pinning ρ pinning, and the orientational correlation exhibits a change from quasi-long-range to short-range order at ρ pinning = 0.02. Interestingly, the dynamics shows a non-monotonic change with increasing the fraction of pinning. This is due to the competition between the disorder that enhances the dynamics and the pinning that hinders the particle motions. Our work highlights the important role of the pinning on the colloidal glass transition, which not only provides a new strategy to prevent crystallization forming glass, but also is helpful for understanding of the vitrification in colloidal systems.

Non-iridescent structural color pigments from liquid marbles

2015 ◽  
Vol 3 (26) ◽  
pp. 6607-6612 ◽  
Author(s):  
Hongcheng Gu ◽  
Baofen Ye ◽  
Haibo Ding ◽  
Cihui Liu ◽  
Yuanjin Zhao ◽  
...  
Keyword(s):  
Structural Color ◽  
Liquid Marbles ◽  
Liquid Marble ◽  
Colloidal Arrays

Non-iridescent structural color pigments with hierarchical micro/nanostructures and ordered/amorphous colloidal arrays on their surfaces were generated from liquid marble microreactors.

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