Novel Quaternary Ammonium Derivatives Based on Apple Pectin.

Area of Science:

• Materials Science
• Polymer Chemistry
• Biochemistry

Background:

• Pectin, a natural polysaccharide, serves as a versatile biomaterial.
• Chemical modification of pectin can yield novel derivatives with enhanced properties.
• Quaternary ammonium derivatives (quats) are known for their antimicrobial activities.

Purpose of the Study:

• To synthesize novel quaternary ammonium derivatives of apple pectin (QPAs).
• To characterize the synthesized QPAs using various analytical techniques.
• To evaluate the antipathogenic potential of QPAs against specific microbial strains.

Main Methods:

• Synthesis via chemical modification of apple pectin (PA) with epichlorohydrin (ECH) and tertiary amines.
• Characterization using elemental analysis, conductometric titration, FTIR, and 13C NMR.
• Physicochemical analysis including viscosity measurements, DLS, STEM, and WAXD.

Main Results:

• Successful synthesis of QPAs confirmed by spectroscopic and elemental analyses.
• Viscosity and DLS studies indicated aggregate formation in aqueous solutions.
• STEM revealed distinct polymeric chain and aggregate structures.
• QPAs exhibited reduced thermal stability and crystallinity compared to native PA.
• QPAs demonstrated significant antipathogenic activity against S. aureus and C. albicans.

Conclusions:

• Novel quaternary ammonium derivatives of apple pectin were successfully synthesized and characterized.
• The synthesized QPAs possess amphiphilic properties and form aggregates in solution.
• QPAs show promising antimicrobial efficacy, suggesting their potential application as antipathogenic agents.