ICCAS OpenIR
Study of dispersion mechanisms of modified SiC powder: electrostatic repulsion and steric hindrance mechanism
Wei, Yanan; Liu, Youxing
2019-09-21
Source PublicationNEW JOURNAL OF CHEMISTRY
ISSN1144-0546
Volume43Issue:35Pages:14036-14044
AbstractSurface modification technology was used to increase the dispersion of SiC powder. A slurry with high stability was fabricated using modified SiC powder with high dispersibility. The relative settlement height (RSH) of the slurry was maintained at 72.5% after 30 hours, indicating the high stability of SiC powder co-modified with polyvinylpyrrolidone (PVP) and tetramethyl ammonium hydroxide (TMAH) in water medium. Meanwhile, the minimum viscosity of 0.322 Pa s was obtained at 45 vol% solid content, and the maximum solid content of the slurry was 64.6 vol%. In addition, the maximum zeta potential of modified SiC powder was -58.5 mV, indicating strong electrostatic repulsion among particles. Therefore, the modified SiC powder shows high dispersion. More important is that the effect of the dispersion mechanism on the performance of modified SiC powder was investigated in depth. TMAH, as one of the excellent dispersants, can increase the electrostatic repulsion among particles significantly, facilitating the preparation of the slurry with low viscosity and high solid content. However, PVP, as one of the neutral polymers with hydrophilicity, plays an important role in maintaining the stability of the slurry.
DOI10.1039/c9nj02131k
Indexed BySCI
Language英语
WOS IDWOS:000484979300036
EI Accession Number1369-9261
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82588
Collection中国科学院化学研究所
AffiliationChinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wei, Yanan,Liu, Youxing. Study of dispersion mechanisms of modified SiC powder: electrostatic repulsion and steric hindrance mechanism[J]. NEW JOURNAL OF CHEMISTRY,2019,43(35):14036-14044.
APA Wei, Yanan,&Liu, Youxing.(2019).Study of dispersion mechanisms of modified SiC powder: electrostatic repulsion and steric hindrance mechanism.NEW JOURNAL OF CHEMISTRY,43(35),14036-14044.
MLA Wei, Yanan,et al."Study of dispersion mechanisms of modified SiC powder: electrostatic repulsion and steric hindrance mechanism".NEW JOURNAL OF CHEMISTRY 43.35(2019):14036-14044.
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