A crosslinked system from scleroglucan derivative: preparation and characterization

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Chemical Engineering

Background:

• Scleroglucan, a natural polysaccharide, can be chemically modified to create functional biomaterials.
• Crosslinked polymer networks form hydrogels with potential applications in drug delivery and tissue engineering.

Purpose of the Study:

• To synthesize and characterize novel hydrogel matrices from a polycarboxylated scleroglucan derivative (sclerox) crosslinked with 1,6-hexanedibromide.
• To investigate the influence of crosslinking density and ionic strength on hydrogel swelling behavior.
• To evaluate the swelling kinetics and molecular permeation properties of the prepared hydrogels.

Main Methods:

• Hydrogel synthesis via crosslinking reaction between sclerox and 1,6-hexanedibromide.
• Characterization of hydrogel properties, including water uptake and swelling kinetics.
• Determination of crosslink density using Flory equilibrium equations under varying ionic strength conditions.
• Permeation studies using model molecules: theophylline and polystyrene sulphonate-sodium salt.

Main Results:

• Varying ratios of crosslinker to sclerox resulted in hydrogels with distinct properties.
• Hydrogels with low crosslinking density exhibited significant water uptake changes with ionic strength.
• Swelling kinetics were successfully modeled using a recently proposed method.
• Differential permeation of theophylline and polystyrene sulphonate-sodium salt was observed.

Conclusions:

• The crosslinking density significantly impacts the swelling behavior and ionic sensitivity of scleroglucan-based hydrogels.
• The developed hydrogels demonstrate tunable properties suitable for controlled release applications.
• The study provides a comprehensive understanding of scleroglucan hydrogel formation and performance.