纳米二氧化硅在 50% 水合乙二醇和 50% 水合丙二醇中的 Zeta 电位。

Zeta Potential of Nanosilica in 50% Aqueous Ethylene Glycol and in 50% Aqueous Propylene Glycol.

机构信息

Department of Electrical Engineering, Lublin University of Technology, Nadbystrzycka 38, 20618 Lublin, Poland.

出版信息

Molecules. 2023 Jan 30;28(3):1335. doi: 10.3390/molecules28031335.

DOI:10.3390/molecules28031335

PMID:36771002

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9920482/

Abstract

A sufficient amount of ionic surfactants may induce a zeta potential of silica particles dispersed in water-glycol mixtures of about 100 mV in absolute value. Nanoparticles of silica were dispersed in 50-50 ethylene glycol (EG)-water and 50-50 propylene glycol (PG)-water mixtures, and the zeta potential was studied as a function of acid, base, and surfactant concentrations. The addition of HCl had a limited effect on the zeta potential. The addition of NaOH in excess of 10 M induced a zeta potential of about -80 mV in 50% EG, but in 50% PG the effect of NaOH was less significant. The addition of CTMABr in excess of 10 M induced a zeta potential of about +100 mV in 50% EG and in 50% PG. The addition of SDS in excess of 10 M induced a zeta potential of about -80 mV in 50% EG and in 50% PG. Long-chained analogs of SDS were even more efficient than SDS, but their application is limited by their low solubility in aqueous glycols.

摘要

足够数量的离子型表面活性剂可能会使分散在水-二醇混合物中的硅酸钠颗粒的 ζ 电位绝对值达到约 100 mV。将硅酸钠纳米颗粒分散在 50-50 乙二醇 (EG)-水和 50-50 丙二醇 (PG)-水混合物中，并研究了 ζ 电位作为酸、碱和表面活性剂浓度的函数。添加 HCl 对 ζ 电位的影响有限。添加超过 10 M 的 NaOH 在 50%EG 中诱导出约 -80 mV 的 ζ 电位，但在 50%PG 中 NaOH 的影响较小。添加超过 10 M 的 CTMABr 会在 50%EG 和 50%PG 中诱导出约 +100 mV 的 ζ 电位。添加超过 10 M 的 SDS 在 50%EG 和 50%PG 中诱导出约 -80 mV 的 ζ 电位。SDS 的长链类似物比 SDS 更有效，但由于它们在水性二醇中的溶解度低，其应用受到限制。