Study of dispersion mechanisms of modified SiC powder: electrostatic repulsion and steric hindrance mechanism
文献类型：期刊论文
| 作者 | Wei, Yanan; Liu, Youxing |
| 刊名 | NEW JOURNAL OF CHEMISTRY
 |
| 出版日期 | 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 |
| 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. |
入库方式： OAI收割
来源：化学研究所
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