| 热处理对憎水硅胶吸附水蒸气的影响 |
| |
| 引用本文： | 沈钟,邵长生,陈丽特,浦惠玲,许秋华.热处理对憎水硅胶吸附水蒸气的影响[J].高等学校化学学报,1989,10(9):968. |
| |
| 作者姓名： | 沈钟 邵长生 陈丽特 浦惠玲 许秋华 |
| |
| 作者单位： | 江苏化工学院有机化工系 |
| |
| 摘 要： | 用甲基氯硅烷蒸气或溶液处理硅胶,均可制成憎水硅胶。关于憎水硅胶的吸附性能和热稳定性的研究,文献中时有报道。本文主要探讨以下3个问题:(1)在水蒸气吸附中,硅胶表面自由羟基和缔合羟基究竟哪种起主要作用;(2)从吸附水蒸气等数据讨论硅胶表面有机基团—OSi(CH_3)_3的热稳定性;(3)用二甲基二氯硅烷(DMCS)和三甲基氯硅烷(TMCS)处理的憎水硅胶,哪种硅胶的热稳定性较高。这些基本问题,不仅具有学术意义,对研究氧化物表面改性也有参考价值。
|
| 关 键 词： | 憎水硅胶 热处理 水蒸气吸附 |
| 收稿时间： | 1987-10-17 |
Effect of Heat-Treatment on Adsorption of Water Vapor of Hydrophobic Silica Gels |
| |
| Shen Zhong,Shao Changsheng,Chen Lite,Pu Huiling,Xu Qiuhua.Effect of Heat-Treatment on Adsorption of Water Vapor of Hydrophobic Silica Gels[J].Chemical Research In Chinese Universities,1989,10(9):968. |
| |
| Authors: | Shen Zhong Shao Changsheng Chen Lite Pu Huiling Xu Qiuhua |
| |
| Institution: | Department of Organic Chemical Engineering, Jiangsu Institute of Chemical Technology, Changzhou |
| |
| Abstract: | In the present investigation, two samples of hydrophobic silica gel have been prepared, and heated at different temperatures up to 600 or 800 ℃.The water vapor adsorption isotherms, adsorption amount of methylene blue and the TG-DTAcurves were determined.Some conclusions were obtained as follows: (1) In water vapor adsorption, only "free" hydroxyls on silica gel surface interact with water molecules; (2) When temperature is raised to 500 ℃, the methylated surface of hydrophobic silica gel is destroyed partly, and completely destroyed at 600 ℃; (3) The heat stability of silica gel treated with trimethyl-chlorosilane is greater than that treated with dimethyldichlorosilane. |
| |
| Keywords: | Hydrophobia silica gel Heat-treatment Water vapor adsorption |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《高等学校化学学报》浏览原始摘要信息 |
| 点击此处可从《高等学校化学学报》下载免费的PDF全文 |
|
