Pulsed electric field-assisted modification of pectin from sugar beet pulp

Area of Science:

• Food Science and Technology
• Biomaterials Engineering
• Chemical Engineering

Background:

• Sugar beet pulp (SBP) pectin is a valuable polysaccharide with diverse applications.
• Traditional pectin modification methods often involve solvents and multiple steps.
• Developing efficient and environmentally friendly pectin modification techniques is crucial for industrial scalability.

Purpose of the Study:

• To investigate the efficacy of pulsed electric field (PEF) technology for the one-step modification of SBP pectin.
• To prepare pectin derivatives with varying degrees of esterification (DE) using PEF.
• To evaluate the structural and thermal properties of PEF-modified pectin.

Main Methods:

• One-step modification of SBP pectin using PEF technology without solvents.
• Varying PEF intensity (18–30 kV cm⁻¹) and specific energy input (124–345 J mL⁻¹).
• Characterization of modified pectin using Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Nuclear Magnetic Resonance (NMR) spectroscopy, and thermogravimetric analysis (TGA).

Main Results:

• PEF treatment significantly increased the DE of pectin derivatives from 49 to 84.
• Evidence of pectin modification confirmed by FT-IR, XRD, and NMR analyses.
• Modified pectin exhibited enhanced thermal stability compared to untreated pectin.

Conclusions:

• PEF technology is a viable and efficient method for the solvent-free modification of SBP pectin.
• The degree of esterification and thermal stability of pectin can be controlled by adjusting PEF parameters.
• PEF presents a promising technology for the industrial production of pectin derivatives.