Facile synthesis of octyl-modified alginate for oil-water emulsification
- PDF / 2,984,744 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 52 Downloads / 232 Views
ORIGINAL CONTRIBUTION
Facile synthesis of octyl-modified alginate for oil-water emulsification Ting Lü 1 & Yan Wu 1 & Yu Tao 1 & Dong Zhang 1 & Dongming Qi 2 & Hongting Zhao 1,3 Received: 6 April 2020 / Revised: 30 July 2020 / Accepted: 31 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this study, a series of octyl-modified alginates (H-SA) were successfully synthesized via covalently coupling various amounts of octylamine (OA) to sodium alginate (SA) and was then characterized by multiple techniques. Despite its poor surface tension reduction effectiveness, the synthesized H-SA could effectively reduce the oil-water interfacial tension. Therefore, the H-SA was used to emulsify various types of oils, and their emulsification performances were evaluated in terms of the oil droplet size and emulsion viscosity after emulsification. It was found that the emulsifying efficiency was enhanced with increasing octyl substitution degree (OSD) over the studied range. Moreover, the influences of pH value and salt content on the emulsifying efficiency were also investigated in detail. Overall, H-SA can be easily synthesized, providing a promising biodegradable emulsifier for the oil emulsification in an aqueous environment. Keywords Sodium alginate . Octylamine . Emulsification performance . Oil droplet size
Introduction The oil-in-water emulsion is widely used in our daily life and production activity. The prepared emulsions are usually thermodynamically unstable because of the unfavorable contact between the oil and water phases, and hence, they will always breakdown over time [1]. Accordingly, the addition of emulsifiers into the immiscible oil-water mixture becomes particularly necessary for the formation and stabilization of various emulsions. At present, emulsifiers are extensively applied in many fields, such as food, medicine, environmental, and Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00396-020-04745-x) contains supplementary material, which is available to authorized users. * Hongting Zhao [email protected] 1
Institute of Environmental Materials and Applications, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
2
Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China
3
School of Environmental and Chemical Engineering, Foshan University, Foshan 528011, Guangdong, China
chemical industries. Traditional emulsifiers generally have both hydrophobic and hydrophilic groups and prefer to assemble at the oil-water interface. These emulsifiers can not only decrease the oil-water interfacial tension but also provide the stabilization function for the emulsified oil droplets via electrostatic repulsion or steric hindrance [2]. However, among the most commonly used emulsifiers, majority of them come from or were synthesized by using petrochemical resources. With the depletion of fos
Data Loading...
