Novel hydrogel system from scleroglucan: synthesis and characterization

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Drug Delivery Systems

Background:

• Scleroglucan derivatives offer potential for novel biomaterials.
• Hydrogels are widely used in drug delivery due to their swelling properties.
• Controlling hydrogel properties is crucial for predictable drug release.

Purpose of the Study:

• To synthesize and characterize novel hydrogels from a polycarboxylated scleroglucan derivative (sclerox) and 1,6-hexanedibromide.
• To investigate the effect of crosslinking degree on hydrogel properties, including water uptake and drug diffusion.
• To evaluate the potential of these hydrogels for sustained drug release applications.

Main Methods:

• Hydrogel synthesis via crosslinking of sclerox with 1,6-hexanedibromide.
• Characterization of hydrogel properties, including water uptake and ionic strength effects.
• In vitro diffusion studies using theophylline as a model drug.
• Theoretical analysis to determine permeability coefficients.

Main Results:

• Hydrogels with varying properties were successfully prepared by altering the sclerox to crosslinker ratio.
• Low crosslinking hydrogels exhibited significant water uptake, sensitive to ionic strength.
• Theophylline diffusion was studied, and permeability coefficients were calculated under different conditions.
• Tablets formulated with the hydrogels demonstrated sustained drug release behavior.

Conclusions:

• The synthesized sclerox-based hydrogels are tunable and exhibit properties suitable for controlled release.
• The crosslinking density critically influences hydrogel swelling and drug diffusion characteristics.
• These novel hydrogels represent a promising platform for developing effective sustained drug delivery systems.