A temperature-responsive supramolecular hydrogel: preparation, gel–gel transition and molecular aggregation

Soft Matter ◽  
2018 ◽  
Vol 14 (16) ◽  
pp. 3090-3095 ◽  
Author(s):  
Lin Wang ◽  
Xuefeng Shi ◽  
Jinben Wang
Keyword(s):  
Phase Transition ◽  
Gemini Surfactant ◽  
Molecular Aggregation ◽  
Supramolecular Hydrogel ◽  
Temperature Responsive ◽  
Gel Phase ◽  
Reversible Gel ◽  
Gel Transition

A supramolecular hydrogel based on a gemini surfactant exhibits a reversible gel–gel phase transition and the turbid hydrogel possesses more compacted assemblies than the transparent one.

Temperature-responsive hydrogels containing new LCST methacrylate macromonomers

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
Anna Korytkowska-Wałach ◽  
Anna Porwoł ◽  
Mirosław Gibas
Keyword(s):  
Phase Transition ◽  
Biomedical Applications ◽  
Tetraethylene Glycol ◽  
Temperature Sensitive ◽  
Hydroxyethyl Methacrylate ◽  
Temperature Responsive ◽  
Michael Type Addition ◽  
Responsive Hydrogels ◽  
Ether Ester ◽  
Gel Transition

AbstractA series of hydrogels were synthesized: homopolymers of new temperature-sensitive methacrylate macromonomers of ether-ester structure, derived from monomethacrylate of tetraethylene glycol via Michael-type addition - oligo(TTEGMMA), and copolymers of oligo(TTEGMMA) with N-isopropylacrylamide (NIPAAm) or 2-hydroxyethyl methacrylate (HEMA). Hydrogels based on oligo(TTEGMMA) demonstrate broad volume phase transition. Combination of oligo(TTEGMMA) with NIPAAm or HEMA yielded hydrogels having narrower phase transition and lower gel transition temperature (LGTT) up to 43 °C at the most, which is in the range of interest for most biomedical applications.

Electrically induced gel-to-gel phase-transition in neurons

2006 ◽  
Vol 30 (2) ◽  
pp. 175-182 ◽  
Author(s):  
R KELLERMAYER ◽  
A ZSOMBOK ◽  
T AUER ◽  
F GALLYAS
Keyword(s):  
Phase Transition ◽  
Gel Phase

scholarly journals Reversible gel–sol photoswitching with an overcrowded alkene-based bis-urea supergelator

2016 ◽  
Vol 7 (7) ◽  
pp. 4341-4346 ◽  
Author(s):  
Sander J. Wezenberg ◽  
Christelle M. Croisetu ◽  
Marc C. A. Stuart ◽  
Ben L. Feringa
Keyword(s):  
Phase Transition ◽  
Molecular Weight ◽  
Uv Irradiation ◽  
Low Molecular Weight ◽  
Reversible Gel

A low-molecular-weight organogel composed of photoresponsive bis-urea gelators can undergo a reversible gel–sol phase transition upon UV irradiation.

Physical state of cellulose in BmimCl: dependence of molar mass on viscoelasticity and sol-gel transition

2016 ◽  
Vol 18 (3) ◽  
pp. 1460-1469 ◽  
Author(s):  
Yongjun Ahn ◽  
Seung-Yeop Kwak ◽  
Younghan Song ◽  
Hyungsup Kim
Keyword(s):  
Phase Transition ◽  
Ionic Liquid ◽  
Physical State ◽  
Molar Mass ◽  
Sol Gel ◽  
Cellulose Depolymerization ◽  
Sol Gel Transition ◽  
Gel Transition

Monitoring cellulose depolymerization and phase transition in ionic liquid.

scholarly journals Variation of thermal conductivity of DPPC lipid bilayer membranes around the phase transition temperature

2017 ◽  
Vol 14 (130) ◽  
pp. 20170127 ◽  
Author(s):  
Sina Youssefian ◽  
Nima Rahbar ◽  
Christopher R. Lambert ◽  
Steven Van Dessel
Keyword(s):  
Phase Transition ◽  
Thermal Conductivity ◽  
Thermal Properties ◽  
Transition Temperature ◽  
Lipid Bilayer ◽  
Lipid Bilayers ◽  
Phase Transition Temperature ◽  
Temperature Gradients ◽  
Phase Behaviour ◽  
Gel Phase

Given their amphiphilic nature and chemical structure, phospholipids exhibit a strong thermotropic and lyotropic phase behaviour in an aqueous environment. Around the phase transition temperature, phospholipids transform from a gel-like state to a fluid crystalline structure. In this transition, many key characteristics of the lipid bilayers such as structure and thermal properties alter. In this study, we employed atomistic simulation techniques to study the structure and underlying mechanisms of heat transfer in dipalmitoylphosphatidylcholine (DPPC) lipid bilayers around the fluid–gel phase transformation. To investigate this phenomenon, we performed non-equilibrium molecular dynamics simulations for a range of different temperature gradients. The results show that the thermal properties of the DPPC bilayer are highly dependent on the temperature gradient. Higher temperature gradients cause an increase in the thermal conductivity of the DPPC lipid bilayer. We also found that the thermal conductivity of DPPC is lowest at the transition temperature whereby one lipid leaflet is in the gel phase and the other is in the liquid crystalline phase. This is essentially related to a growth in thermal resistance between the two leaflets of lipid at the transition temperature. These results provide significant new insights into developing new thermal insulation for engineering applications.

Sol-gel phase transition of brucine-appended porphyrin gelator: a study by vibrational circular dichroism spectroscopy

2002 ◽  
Vol 13 (24) ◽  
pp. 2661-2666 ◽  
Author(s):  
Vladimı́r Setnička ◽  
Marie Urbanová ◽  
Statis Pataridis ◽  
Vladimı́r Král ◽  
Karel Volka
Keyword(s):  
Phase Transition ◽  
Circular Dichroism ◽  
Sol Gel ◽  
Circular Dichroism Spectroscopy ◽  
Vibrational Circular Dichroism ◽  
Gel Phase ◽  
Circular Dichroïsm

Synthesis and characterization of CO2-sensitive temperature-responsive catalytic poly(ionic liquid) microgels

2018 ◽  
Vol 9 (21) ◽  
pp. 2887-2896 ◽  
Author(s):  
Shoumin Chen ◽  
Xuezhen Lin ◽  
Zhenghao Zhai ◽  
Ruyue Lan ◽  
Jin Li ◽  
...  
Keyword(s):  
Phase Transition ◽  
Ionic Liquid ◽  
Synthesis And Characterization ◽  
Volume Phase Transition ◽  
Phase Transition Behavior ◽  
Volume Phase ◽  
Temperature Responsive ◽  
Transition Behavior ◽  
Poly Ionic Liquid

A class of poly(ionic liquid) microgels exhibiting CO2-switchable temperature-responsive volume phase transition behavior have been synthesized and used for CO2 fixation.

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