Study of dispersion mechanisms of modified SiC powder: electrostatic repulsion and steric hindrance mechanism

doi:10.1039/c9nj02131k

CORC > 化学研究所 > 中国科学院化学研究所

	Study of dispersion mechanisms of modified SiC powder: electrostatic repulsion and steric hindrance mechanism
	Wei, Yanan; Liu, Youxing
刊名	NEW JOURNAL OF CHEMISTRY
	2019-09-21
卷号	43 期号:35 页码:14036-14044
ISSN号	1144-0546
DOI	10.1039/c9nj02131k
英文摘要	Surface 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.
语种	英语
WOS记录号	WOS:000484979300036
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/82588]
专题	中国科学院化学研究所
作者单位	Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
推荐引用方式 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.