Zeta potential measurements for non-spherical colloidal particles – Practical issues of characterisation of interfacial properties of nanoparticles
Zeta potential measurements for non-spherical colloidal particles – Practical issues of characterisation of interfacial properties of nanoparticles
复制标题
DOI：
10.1016/j.colsurfa.2017.04.010
复制
发表时间：
2017-11
期刊：
影响因子：
--
通讯作者：
R. Marín;F. Babick;Lars Hillemann
中科院分区：
文献类型：
--
作者：
R. Marín;F. Babick;Lars Hillemann
基于颗粒的新产品在稳定性和物理化学行为方面的优化需要表征界面特性。这种表征可以通过ζ电位来实现，其与胶体颗粒的表面电荷和双电层（EDL）有关。此外，zeta电位是EDL的一个强有力的参数，也是预测悬浮液稳定性的一种适当方式。本研究探讨了两种zeta电位值测量技术的性能及其对热原材料zeta电位值的可比性。这种测量遇到了一些实验挑战，因为每种测量技术都有关于颗粒尺寸，浓度和形态的特定限制。此外，本研究通过改变所提到的具体限制，考虑到化学平衡的守恒，并了解聚集体形态对电动迁移率的影响，来检查zeta电位测量的可比性。
The optimisation of new particle based products with respect to their stability and physico-chemical behaviour requires the characterisation of the interfacial properties. Such a characterisation may be achieved by means of the zeta potential, which is related to the surface charge and electric double layer (EDL) of colloidal particles. Furthermore, the zeta potential is a powerful parameter of the EDL and an appropriate way of predicting the suspension stability. This study discusses the performance of two techniques for the measurement of zeta potential value and its comparability of zeta potential values for pyrogenic materials. This measurement encounters several experimental challenges, because each measurement technique possesses specific limits with regard to particle size, concentration and morphology. Furthermore, this study examines the comparability of zeta potential measurements by variation of mentioned specific limits taking the conservation of the chemical equilibrium into account and also understanding the impact of aggregate morphology on the electrokinetic mobility.