Coacervation-driven instant paintable underwater adhesives with tunable optical and electrochromic properties

2021 ◽  
Author(s):  
Qiongyao Peng ◽  
Jingsi Chen ◽  
Tao Wang ◽  
Lu Gong ◽  
Xuwen Peng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Solution Phase ◽  
Dilute Solution ◽  
Electrochromic Properties ◽  
Oppositely Charged ◽  
Liquid Liquid Phase Separation ◽  
Coacervate Phase

Coacervation generally refers to liquid-liquid phase separation when mixing oppositely charged polyelectrolytes in an aqueous solution, which produces a polyelectrolyte‐dense coacervate phase in a dilute solution phase. Coacervation plays a...

Intra-molecular interactions dominating the dehydration of a poly(2-isopropyl-2-oxazoline)-based densely grafted polymer comb in aqueous solution and hysteretic liquid–liquid phase separation

2017 ◽  
Vol 19 (9) ◽  
pp. 6626-6635 ◽  
Author(s):  
Yuanyuan Zhou ◽  
Hui Tang ◽  
Peiyi Wu
Keyword(s):  
Aqueous Solution ◽  
Phase Separation ◽  
Liquid Phase ◽  
Molecular Interactions ◽  
Liquid Phase Separation ◽  
Grafted Polymer ◽  
Liquid Liquid Phase Separation

Temperature-induced association and hysteretic LLPS process of a poly(2-isopropyl-2-oxazoline) (PiPOx)-based polymer comb in water.

scholarly journals Self‐Emergent Protocells Generated in an Aqueous Solution with Binary Macromolecules through Liquid‐Liquid Phase Separation

ChemBioChem ◽  
2020 ◽  
Vol 21 (23) ◽  
pp. 3323-3328
Author(s):  
Hiroki Sakuta ◽  
Fumika Fujita ◽  
Tsutomu Hamada ◽  
Masahito Hayashi ◽  
Kingo Takiguchi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Liquid Liquid Phase Separation

scholarly journals Observations on hygroscopic growth and phase transitions of mixed 1, 2, 6-hexanetriol/(NH4</sub>)<sub>2</sub>SO<sub>4</sub> particles: Investigation of liquid-liquid phase separation (LLPS) dynamic process and mechanism and secondary LLPS

2021 ◽  
Author(s):  
Shuai-Shuai Ma ◽  
Zhe Chen ◽  
Shu-Feng Pang ◽  
Yun-Hong Zhang
Keyword(s):  
Phase Transitions ◽  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Solution Phase ◽  
High Time Resolution ◽  
Hygroscopic Growth ◽  
Inorganic Particles ◽  
Inorganic Components ◽  
Liquid Liquid Phase Separation

Abstract. Atmospheric aerosols consisting of organic and inorganic components may undergo liquid-liquid phase separation (LLPS) and liquid-solid phase transitions during ambient relative humidity (RH) fluctuation. However, the knowledge of dynamic phase evolution processes for mixed organic-inorganic particles is scarce. Here we present a universal and visualized observation on LLPS, efflorescence and deliquescence transitions as well as hygroscopic growth of mixed 1, 2, 6-hexanetriol/ammonium sulfate (AS) particles with different organic-inorganic mole ratios (OIR = 1:4, 1:2, 1:1, 2:1 and 4:1) with the high time resolution (0.5 s), using an optical microscope with a video camera. The optical images suggest that an inner AS solution phase is surrounded by an outer organic-rich phase after LLPS for all mixed particles. The LLPS mechanism for particles with different OIRs differs, meanwhile, multiple mechanisms may dominate successively in individual particles with a certain OIR, somewhat inconsistent with earlier observations by literature. More importantly, another phase separation in inner AS solution phase, defined as secondary LLPS here, is observed for OIR = 1:1, 1:2 and 1:4 particles. The secondary LLPS may be attributed to the formation of more concentrated AS inclusions in the inner phase, and becomes more obvious with decreasing RH and increasing AS mole fraction. Furthermore, the changes in size and amount of AS inclusions during LLPS are quantitatively characterized, which further illustrate the equilibrium partitioning process of organic and inorganic components. The experimental results have significant implications for revelation of complex phase transitions of internally mixed atmospheric particles and evaluation of liquid-liquid and liquid-solid equilibria in thermodynamic models.

scholarly journals Cover Feature: Self‐Emergent Protocells Generated in an Aqueous Solution with Binary Macromolecules through Liquid‐Liquid Phase Separation (ChemBioChem 23/2020)

ChemBioChem ◽  
2020 ◽  
Vol 21 (23) ◽  
pp. 3290-3290
Author(s):  
Hiroki Sakuta ◽  
Fumika Fujita ◽  
Tsutomu Hamada ◽  
Masahito Hayashi ◽  
Kingo Takiguchi ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Liquid Liquid Phase Separation

scholarly journals Observations on hygroscopic growth and phase transitions of mixed 1, 2, 6-hexanetriol ∕ (NH<sub>4</sub>)<sub>2</sub>SO<sub>4</sub> particles: investigation of the liquid–liquid phase separation (LLPS) dynamic process and mechanism and secondary LLPS during the dehumidification

2021 ◽  
Vol 21 (12) ◽  
pp. 9705-9717
Author(s):  
Shuaishuai Ma ◽  
Zhe Chen ◽  
Shufeng Pang ◽  
Yunhong Zhang
Keyword(s):  
Phase Transitions ◽  
Phase Separation ◽  
Liquid Phase ◽  
Liquid Phase Separation ◽  
Solution Phase ◽  
High Time Resolution ◽  
Hygroscopic Growth ◽  
Inorganic Particles ◽  
Inorganic Components ◽  
Liquid Liquid Phase Separation

Abstract. Atmospheric aerosols consisting of organic and inorganic components may undergo liquid–liquid phase separation (LLPS) and liquid–solid phase transitions during ambient relative humidity (RH) fluctuation. However, the knowledge of dynamic phase evolution processes for mixed organic–inorganic particles is scarce. Here we present a universal and visualized observation of LLPS, efflorescence and deliquescence transitions as well as hygroscopic growth of laboratory-generated mixed 1, 2, 6-hexanetriol / ammonium sulfate (AS) particles with different organic–inorganic mole ratios (OIR = 1:4, 1:2, 1:1, 2:1 and 4:1) with high time resolution (0.5 s) using an optical microscope operated with a video camera. The optical images suggest that an inner AS solution phase is surrounded by an outer organic-rich phase after LLPS for all mixed particles. The LLPS mechanism for particles with different OIRs is found to be distinct; meanwhile, multiple mechanisms may dominate successively in individual particles with a certain OIR, somewhat inconsistently with previously reported observations. More importantly, another phase separation in the inner AS solution phase, defined as secondary LLPS here, is observed for OIR = 1:1, 1:2 and 1:4 particles. The secondary LLPS may be attributed to the formation of more concentrated AS inclusions in the inner phase and becomes more obvious with decreasing RH and increasing AS mole fraction. Furthermore, the changes in size and number of AS inclusions during LLPS are quantitatively characterized, which further illustrate the equilibrium partitioning process of organic and inorganic components. These experimental results have significant implications for the revelation of complex phase transitions of internally mixed atmospheric particles and evaluation of liquid–liquid and liquid–solid equilibria in thermodynamic models.

scholarly journals Non-associative phase separation in an evaporating droplet as a model for prebiotic compartmentalization

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Wei Guo ◽  
Andrew B. Kinghorn ◽  
Yage Zhang ◽  
Qingchuan Li ◽  
Aditi Dey Poonam ◽  
...  
Keyword(s):  
Phase Separation ◽  
Liquid Phase ◽  
Building Blocks ◽  
In Vitro Transcription ◽  
Liquid Phase Separation ◽  
Sessile Droplet ◽  
And Storage ◽  
Oppositely Charged ◽  
Liquid Liquid Phase Separation

AbstractThe synthetic pathways of life’s building blocks are envisaged to be through a series of complex prebiotic reactions and processes. However, the strategy to compartmentalize and concentrate biopolymers under prebiotic conditions remains elusive. Liquid-liquid phase separation is a mechanism by which membraneless organelles form inside cells, and has been hypothesized as a potential mechanism for prebiotic compartmentalization. Associative phase separation of oppositely charged species has been shown to partition RNA, but the strongly negative charge exhibited by RNA suggests that RNA-polycation interactions could inhibit RNA folding and its functioning inside the coacervates. Here, we present a prebiotically plausible pathway for non-associative phase separation within an evaporating all-aqueous sessile droplet. We quantitatively investigate the kinetic pathway of phase separation triggered by the non-uniform evaporation rate, together with the Marangoni flow-driven hydrodynamics inside the sessile droplet. With the ability to undergo liquid-liquid phase separation, the drying droplets provide a robust mechanism for formation of prebiotic membraneless compartments, as demonstrated by localization and storage of nucleic acids, in vitro transcription, as well as a three-fold enhancement of ribozyme activity. The compartmentalization mechanism illustrated in this model system is feasible on wet organophilic silica-rich surfaces during early molecular evolution.

scholarly journals Non-spherical coacervate shapes in an enzyme driven active system

2019 ◽  
Author(s):  
Willem Kasper Spoelstra ◽  
Eli O. van der Sluis ◽  
Marileen Dogterom ◽  
Louis Reese
Keyword(s):  
Phase Separation ◽  
Liquid Phase ◽  
Chemical Processes ◽  
Liquid Phase Separation ◽  
Active System ◽  
Free Nucleotides ◽  
The Relationship ◽  
High Phosphate ◽  
Liquid Liquid Phase Separation ◽  
Coacervate Phase

AbstractCoacervates are polymer-rich droplets that form through liquid-liquid phase separation in polymer solutions. Liquid-liquid phase separation and coacervation have recently been shown to play an important role in the organization of biological systems. Such systems are highly dynamic and under continuous influence of enzymatic and chemical processes. However, it is still unclear how enzymatic and chemical reactions affect the coacervation process. Here, we present and characterize a system of enzymatically active coacervates containing spermine, RNA, free nucleotides, and the template independent RNA (de)polymerase PNPase. We find that these RNA coacervates display transient non-spherical shapes, and we systematically study how PNPase concentration, UDP concentration and temperature affect coacervate morphology. Furthermore, we show that PNPase localizes predominantly into the coacervate phase and that its depolymerization activity in high-phosphate buffer causes coacervate degradation. Our observations of non-spherical coacervate shapes may have broader implications for the relationship between (bio-)chemical activity and coacervate biology.

scholarly journals Liquid-Liquid Phase Separation of Tau Driven by Hydrophobic Interaction Facilitates Fibrillization of Tau

2021 ◽  
Vol 433 (2) ◽  
pp. 166731
Author(s):  
Yanxian Lin ◽  
Yann Fichou ◽  
Andrew P. Longhini ◽  
Luana C. Llanes ◽  
Pengyi Yin ◽  
...  
Keyword(s):  
Phase Separation ◽  
Liquid Phase ◽  
Hydrophobic Interaction ◽  
Liquid Phase Separation ◽  
Liquid Liquid Phase Separation
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