Adsorption mechanism of alkyl polyglucoside (APG) on calcite nanoparticles in aqueous medium at varying pH

作者：Suh Seokjin; Choi Kyeong Ok; Yang Seung Chul; Kim Yeong Eun; Ko Sanghoon^*

来源：Journal of Solid State Chemistry, 2017, 251: 122-130.

DOI：10.1016/j.jssc.2017.04.020

• Alkyl polyglucoside (APG)
• Calcium carbonate (CaCO3) nanoparticles (CCNPs)
• Surface charge
• Hydrogen bond
• Hydrophobic interaction

In this study, adsorption mechanism of alkyl polyglucoside (APG) on calcium carbonate (CaCO3) nanoparticles (CCNPs) in aqueous medium at varying pH was identified. An initial adsorption of APG on CCNP surface seemed to be occurred due to the van der Waals force. An initial surface charge influenced determination of a major driving force, which resulted in hydrogen bonds (pH 7) and the hydrophobic interaction (pH 10) as a main sources of adsorption of APG on the CCNP surface. Even if the initial surface charge of CCNPs had little effect on a quantitative adsorption of APG on CCNPs, eventually, it influence on the definitive adsorption structure between APG and CCNPs and improvement of dispersion stability of CCNPs in water. In conclusion, it was revealed that 0.39% APG aqueous solution was most appropriate to improve the dispersion stability of CCNPs, which is postulated to be used effectively in food and pharmaceutical fields.

• 出版日期2017-7