Work

Assessing the impact of interaction between starch and emulsifier on the performance of starch-based adhesive: Adjusting the alkyl chain lengths of sodium sulfonate

Year: 2025

Type: article

Abstract: Interactions of emulsifiers/starch likely affect interfacial adsorption and migration behavior of emulsifiers, hence, effects of starch/emulsifier interaction on the performance of adhesive is imperatively studied. Here, the interaction between starch and emulsifier was adjusted altering sodium sulfonate alkyl chain lengths (Sodium dodecyl sulfate: SDS, Sodium hexane sulfonate: SHS, and Sodium octadecyl sulfatases: SOS), and its effects on starch-based adhesive performance were investigated. Study revealed latex aggregation regardless of emulsifier addition, with all three sulfonates exhibiting emulsifying effects. Notably, SHS demonstrated low migration propensity and was preferentially embedded within starch molecules. This increased interfacial fusion layer thickness between latex, accelerated fusion, and enhanced molecular network strength, thereby improving adhesive strength. Besides, asymmetric adsorption of short-chain molecules altered latex self-assembly. SDS promoted uniform latex dispersion through interfacial adsorption, weakening internal strength. It reduced interfacial layer thickness, slowed fusion, and facilitated molecular migration to air-water interfaces. SOS moderately increased interparticle repulsion via interfacial adsorption. However, the strengthened hydrophobic interactions of SOS promoted micelle formation, enhancing interactions of latex particles. Consequently, interfacial fusion layer thickness and strength increased, enabling penetration into solid-liquid interfaces with reduced water migration. The findings provide essential insights for designing high-performance starch-based adhesives and understanding the mechanistic effects of emulsifiers.

Source: Industrial Crops and Products

DOI: 10.1016/j.indcrop.2025.122516

Authors: Mengyu Zhang, Mengyuan Liu, Hongwei Sun, Zia-ud Din, Lijie Zhu, Wenping Ding, Lei Chen

Institutions: Wuhan Polytechnic University, National University of Sciences and Technology

Language: English

Topic: Surfactants and Colloidal Systems

Subfield: Organic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,720

Funders: China Association for Science and Technology, Wuhan Municipal Science and Technology Bureau