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Typical rheological data (storage modulus, G'' ( ) and loss …
Storage moduli (G'') recorded in the linear viscoelastic region at constant strain (2%) and frequency (1 Hz) while temperature was increased at a rate of 1 °C/min. Source...
Fast and scalable production of crosslinked polyimide aerogel …
This strategy enables fast sol-gel transition of photosensitive polyimide, resulting in a strongly-crosslinked gel skeleton that effectively maintains the fiber shape and porous nanostructure ...
Sol-Gel Behavior of Hydroxypropyl Methylcellulose (HPMC) in …
The dynamic storage modulus (G′) and loss modulus (G″) were examined as the functions of temperature. Micro-structural changes during and after the gel formation were examined using a confocal microscope (Axiotron 2, Carl Zeiss MicroImaging Co. Ltd., Germany) coupled with a hot plate (CSS 450, Linkam Scientific Instruments Ltd., …
Gels | Free Full-Text | Rheological Considerations of …
The measurement of the viscous and elastic modulus as a function of temperature clearly and unambiguously assigns the rheological changes associated with the sol–gel transition. The intersection or cross-over point of the moduli (G″ = G′) determines the changes that have occurred in the gel structure and clearly indicates the transition …
Relationship between Structure and Rheology of Hydrogels for …
Relationship between Structure and Rheology ...
Gels | Free Full-Text | Physicochemical Properties …
Modulus methods have also been widely used to determine the strength of hydrogels [65,90], cross-over point of storage (G′) over loss moduli (G′′) and can be used to measure gelation kinetics of …
Effect of rheological properties of AlOOH sol on the preparation of Al2O3 nanofiltration membrane by sol-gel …
The storage modulus and loss modulus of AlOOH gel film increase with the increase of aging time. ... The sol-gel method has the advantages of simple equipment, low reaction temperature, and easy film formation, making …
Rheological characterization of an injectable alginate gel system
Gel formation occurred rapidly during the first minutes and the storage modulus subsequently showed a stabilizing tendency as a result of the sol–gel transition. A high content of guluronic acid resulted in a storage modulus that was almost three times greater than for the formulation with lower guluronic acid content in the case of gels …
Typical rheological data (storage modulus, G'' ( ) and loss modulus…
Typical rheological data (storage modulus, G'' ( ) and loss modulus, G" ( )) of sol-gel phase change with accompanying images taken during tube inversion test. Region 1, polymer ...
An Investigation of the Sol-Gel Transition of Chitosan Lactate and …
In recent years, intensive research has been carried out on the use of hydrogels obtained from natural polymers, mainly chitosan. These products are increasingly replacing solutions based on synthetic materials in medicine. This publication presents the results of studies on the sol-gel transition of chitosan solutions as the base material for …
Measuring the Sol to Gel Transition | SpringerLink
The crossing point of the storage and loss moduli, G '' and G ", identifies the sol to gel transition; the crossover time approximates quite well the gelation time. Measuring G '' …
Determination of critical gel-sol transition point of Highly Concentrated Micellar Casein Concentrate using multiple waveform rheological ...
Determining critical gel-sol transition point by measuring rheology at fixed oscillation frequency is not reliable method. • It is important to consider frequency dependence of dynamic moduli while determining critical point …
Extracellular Matrix Hydrogels from Decellularized Tissues: …
Increasing the salt concentration also decreased the storage modulus by ~ 2–3 fold. Interestingly, lowering the gelation temperature below 22 C was shown to inhibit gelation unlike pure collagen hydrogels that can gel between 4–37 C. The impact of gelation ...
T sol-gel and maximum storage modulus of poloxamer 407 …
Download scientific diagram | T sol-gel and maximum storage modulus of poloxamer 407 dissolved in 1X PBS, distilled water, and 1X Tris buffer. The presence of salt in poloxamer ...
Measuring the Sol to Gel Transition | SpringerLink
Figure 6.12 shows the change of storage modulus G'' and loss modulus G" as a function of time for a silica sol prepared using TEOS as precursor [22, 23]; the sols have been synthesized in acid, pH = 4, or basic conditions, pH = 9.
Formula optimization of thermosensitive biological sol–gel carrier …
The effects of ratio, pH, and salinity on the rheological properties of the XLB and XKG systems were evaluated to optimize the formulation and define the sol–gel …
Storage modulus (G'') and loss modulus (G") for beginners
Storage modulus (G'') and loss modulus (G") for beginners
A universal method to easily design tough and stretchable …
A universal method to easily design tough and stretchable ...
Chemical and Microstructural Characterization of pH …
Addition of CaCl2 increased the sol-gel transition pH value to ca. 6, with a twofold increase in loss moduli at low frequencies and ten …
Thermoresponsive systems composed of poloxamer 407 and HPMC or NaCMC: mechanical, rheological and sol-gel …
Formulations showed T sol-gel to ensure easy administration and good retention. • Systems showed rheological synergism and softness dependent on polymer content. • 17.5% poloxamer/3% HPMC or 1% NaCMC are useful for pharmaceutical-biomedical use ...
A study on the material properties of novel PEGDA/gelatin hybrid …
While determining these composite gradients with a low electron beam in Table 1, the elastic modulus of the skin was considered as a target value.This value is approximately 1 MPa (Balakrishnan et al., 2022) the study, first of …
Rheological properties of peptide-based hydrogels for biomedical …
Sifat reologi hidrogel berbasis peptida untuk aplikasi ...
Rheological properties of hydrogels based on ionic liquids
Rheological properties of hydrogels based on ionic liquids
Gelation Kinetics from Rheological Experiments
2 RH103 GEL POINT Figure 1 shows rheological data from an isothermal test, performed at 4 different temperatures. In this note, we will denote the point where the storage modulus crosses over the loss modulus as the gel time. This is also the point at which tan(δ