Hydrogel storage modulus

What is the storage modulus of a hydrogel?

The storage modulus of hydrogel increases with increasing polymer concentration. The hydrogel showed storage moduli of 200 and 400 Pa at 1.5% and 2% (w/v), respectively. Under these conditions, the loss modulus only increases from 12 to 18 Pa when increasing concentration.

Do physical hydrogels have a loss modulus?

Gu et al. compared the loss and storage moduli values of physically and hybrid chemically crosslinked hydrogels; the G’ and G” values of the physical hydrogels were highly frequency dependent with the storage modulus being significantly higher than the loss modulus at the highest frequencies.

What is the rheological behavior of a forming hydrogel?

Gelation tracking The rheological behavior of the forming hydrogel is monitored as a function of time, following the shear storage modulus G′ and the loss modulus G'' (Fig. 1). The storage modulus G′ characterizes the elastic and the loss modulus G″ the viscous part of the viscoelastic behavior.

What is the storage modulus of Si-HPMC hydrogels?

Gel point ranges from 300 to 1300 s, depending on the buffer solution ratio (2/1 and 1/1 (v/v), respectively). After 3 weeks of cross-linking, the Si-HPMC hydrogels were elastic with a storage modulus ranging from 200 to 400 Pa. 1.2. Rheological characterization of physical and chemical gelatin gels

Which hydrogel has the highest storage modulus and lowest loss modulus?

The hydrogel with the maximum concentration (90%) exhibits the highest storage modulus with respect to all other concentrations. It also shows the lowest loss modulus with respect to all concentration ranges. I am unable to explain it further, please suggest probable reasons.

What are the rheological properties of hydrogels?

Using various tests, rheological properties of the hydrogels such as gelation time, storage and loss modulus, and self-healing behavior can be established, all of which contribute towards evaluating the given hydrogel for the intended application.