Work

Mechanisms behind the changes in zein colloidal composite nanoparticles under different mass ratios and pH conditions

Year: 2024

Type: article

Abstract: Hydrophobicity of zein (Z) makes it a candidate for encapsulating hydrophobic compounds and stabilizing Pickering emulsions. However, the high aggregation tendency of Z colloidal particles has limited its applications. It seems that using an available and low-cost hydrophilic biopolymer to coat Z colloidal particles is an efficient way to increase their applications. In this work, the aggregation of Z particles was modulated by incorporating Farsi gum (FG), as a less-known hydrocolloid with attractive characteristics, into the colloidal particles. Z/water-soluble portion of FG (WFG) particles were fabricated at 3-7 pH range and 10:1-1:2 mass ratios using anti-solvent procedure and then characterized. Zeta potential values indicated that in the presence of WFG, the colloidal stability of the particles increased. At higher pH values (pH 7), the Z:WFG (1:1) colloidal particles were smaller than the Z particles. Although WFG incorporation decreased the adsorption rate of particles due to the higher molecular weight and viscosity of the system, Both Z and Z:WFG particles could efficiently reduce interfacial tension. Z (pH 4) and Z: WFG (pH 4) as interfacial layer films revealed non-Newtonian and dominant viscose (G″>G′) characters. This work can help to design Pickering emulsions using alcohol soluble-based particles.

Source: LWT

DOI: 10.1016/j.lwt.2024.117106

Authors: Sara Esteghlal, Masoud Riazi, Abdo-Reza Nekoei, Mehrdad Niakousari, Seyed Mohammad Hashem Hosseini

Institutions: Shiraz University, Shiraz University of Technology

Language: English

Topic: Pickering emulsions and particle stabilization

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,570

Funders: Shiraz University, College of Agriculture, Shiraz University