Open AccessStability of kaolin particles subjected to elevated temperatures using various dispersing agents
Author(s) -
Shahrul Azwan Shakrani,
Afizah Ayob,
Mustaqqim Abdul Rahim,
Salina Alias
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1529/4/042099
Subject(s) - dispersant , dispersion stability , dispersion (optics) , agglomerate , dispersity , chemical engineering , van der waals force , particle size distribution , suspension (topology) , particle size , particle (ecology) , materials science , disperser , sodium hydroxide , chemistry , nanotechnology , nanoparticle , composite material , polymer chemistry , organic chemistry , molecule , engineering , optics , physics , mathematics , oceanography , homotopy , pure mathematics , geology
The stability of kaolin particles is largely influenced by nature and the behaviour of dispersing agents introduced to the system. This study analysed the size of kaolin particles subjected to elevated temperatures by using various dispersing agents such as ultrapure water (UPW), acetone (Ace) and sodium hydroxide (NaOH). It was found that kaolin particles in UPW formed a stable dispersion compared to particles in Ace and NaOH without further aggregation. Interestingly, kaolin particles under UPW, Ace, and NaOH dispersants had a strong affinity for water and can be classified as possessing hydrophilic behaviour. The mean size of kaolin particles was reduced under UPW and Ace dispersion but increased under NaOH suspension. Under UPW dispersion, kaolin particles ranged from 141.8nm to 5560nm, creating a mid-range monodisperse size distribution (0.08 0.7) of greater than 10μm in kaolin with a little aggregation but lacking consistency in terms of stability. However, all dispersants contributed to the kaolin particles dispersion but UPW shown more stability dispersion due to increase in number of hydroxyl groups in dispersant molecule. In conclusion, this simple and low cost methodology can be useful in characterising kaolin particle sizes with limited resources.