scholarly journals Real-time characterization of hydrogel viscoelastic properties and sol-gel phase transitions using cantilever sensors

2020 ◽  
Vol 64 (4) ◽  
pp. 837-850
Author(s):  
Alexander P. Haring ◽  
Manjot Singh ◽  
Miharu Koh ◽  
Ellen Cesewski ◽  
David A. Dillard ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Real Time ◽  
Viscoelastic Properties ◽  
Sol Gel ◽  
Cantilever Sensors ◽  
Gel Phase

Nanomechanical Cantilever Sensors as a Novel Tool for Real-Time Monitoring and Characterization of Surface Layer Formation

2010 ◽  
Vol 10 (4) ◽  
pp. 2578-2582 ◽  
Author(s):  
Joachim Koeser ◽  
Martin Bammerlin ◽  
Felice Mauro Battiston ◽  
Urs Hubler
Keyword(s):  
Surface Layer ◽  
Real Time ◽  
Layer Formation ◽  
Real Time Monitoring ◽  
Cantilever Sensors ◽  
Surface Layer Formation

Preparation and characterization of hydroxybutyl chitosan

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Bin Zhu ◽  
Changzheng Wei ◽  
Chunlin Hou ◽  
Qisheng Gu ◽  
Dajun Chen
Keyword(s):  
Chemical Modification ◽  
Sol Gel ◽  
Chitosan Solution ◽  
Water Soluble ◽  
Full Potential ◽  
Thermosensitive Polymer ◽  
New Type ◽  
Gel Phase ◽  
Further Development

AbstractThe insolubility in neutral condition is a major problem that confronts the further development of processing and uses of chitosan. Special emphasis has been put on the chemical modification of chitosan to explore its full potential. Studies on these methods are also encouraging and many kinds of water-soluble and alcohol-soluble derivatives have appeared. In this article, hydroxybutyl chitosan, a new type of thermosensitive polymer, was prepared through the chemical modification of 1,2-epoxybutane. Hydroxybutyl chitosan solution underwent sol/gel phase transition at a certain temperature lower than 20 °C, however, at high temperature, hydroxybutyl chitosan can form hydrogel with a certain mechanical strength. Hydroxybutyl chitosan could be an ideal themosensitive material applied in drug delivery system, tissue engineering and other biomedical fields.

The effects of sucrose on the sol-gel phase transition and viscoelastic properties of potato starch solutions

2019 ◽  
Vol 271 ◽  
pp. 94-101 ◽  
Author(s):  
Piotr Owczarz ◽  
Magdalena Orczykowska ◽  
Anna Rył ◽  
Patryk Ziółkowski
Keyword(s):  
Phase Transition ◽  
Viscoelastic Properties ◽  
Potato Starch ◽  
Sol Gel ◽  
Gel Phase

Prolonged Chaotic Oscillations During the Gel/Xerogel Transition in Silicon Tetramethoxide Polymerization as Detected by Pyrene Excimerization.

1986 ◽  
Vol 73 ◽  
Author(s):  
Vered R. Kaufman ◽  
David Avnir
Keyword(s):  
Phase Transitions ◽  
Excited State ◽  
Driving Forces ◽  
Sol Gel ◽  
Chaotic Oscillations ◽  
Gel Structure ◽  
Adsorption Sites ◽  
Surface Active Agents ◽  
Surface Active ◽  
Gel Phase

ABSTRACTWhen the polymerization of Si(OCH3)4 is carried out in the presence of surface active agents, prolonged oscillations (over 1000 hrs) at the gel/xerogel transition are observed. The oscillations are of large amplitude, they are slow (several hrs/period), and they exhibit a chaotic behaviour. The probe by which these oscillations are observed is emission from excited state monomeric and excimeric pyrene. It is suggested tentatively that the driving forces for this oscillation are the structural relaxation of the secondary polymeric gel structure and the dispersion of adsorbed pyrene to thermodynamically favored adsorption sites. Relevant models could be those of oscillatory sol/gel phase transitions and of oscillatory polymerization reactions. We are unaware of previous observations of oscillations in sol/gel systems.

Sol–Gel Phase Transitions in a Photochromic Spiropyran-Modified Material by Incorporation in a Hydrogel

2009 ◽  
Vol 9 (10) ◽  
pp. 5990-5996 ◽  
Author(s):  
Soo Jin Lee ◽  
Sung Ho Jung ◽  
Seok-Hoon Lee ◽  
Won Seok Han ◽  
Jong Hwa Jung
Keyword(s):  
Phase Transitions ◽  
Sol Gel ◽  
Gel Phase

scholarly journals Sol–gel phase transitions in thermoreversible gels: Onset of gelation and melting

1996 ◽  
Vol 105 (2) ◽  
pp. 825-836 ◽  
Author(s):  
Y. Liu ◽  
R. B. Pandey
Keyword(s):  
Phase Transitions ◽  
Sol Gel ◽  
Thermoreversible Gels ◽  
Gel Phase
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