Penetration of water/ethanol mixtures into silanized silica fibrous assemblies
Penetration of water/ethanol mixtures into silanized silica fibrous assemblies
复制标题
水/乙醇混合物渗透到硅烷化二氧化硅纤维组件中
DOI：
10.1163/156856198x00470
复制
发表时间：
1998
影响因子：
2.3
通讯作者：
Y. Nakagawa
中科院分区：
文献类型：
--
作者：
M. Tagawa;K. Gotoh;Y. Nakagawa
水/乙醇混合物进入二氧化硅纤维组件的渗透率由润湿引起的电导率变化确定。用γ-氨基丙基三乙氧基硅烷（APTES）和甲基三乙氧基硅烷（MTES）处理二氧化硅纤维组件。通过Wilhelmy方法测量水/乙醇混合物在硅烷化二氧化硅上的前进接触角a。电导率λ在润湿液体-纤维组件接触后的时间开始增加并达到恒定值。通过将实验的λ-t曲线与Washburn方程计算的曲线进行比较，确定了纤维集合体的毛细管分布。对于未处理的和经APTES处理的二氧化硅纤维组件，作为渗透速率的量度的t0值随着水/乙醇混合物中乙醇体积比的增加而增加。这表明润湿液中添加乙醇降低了渗透率。对于经过 MTES 处理的硅...
The penetration rates of water/ethanol mixtures into silica fibrous assemblies were determined from the change in electrical conductivity due to wetting. Silica fibrous assemblies were treated with γ-aminopropyltriethoxysilane (APTES) and methyltriethoxysilane (MTES). The advancing contact angles of the water/ethanol mixtures on silanized silica, a, were measured by the Wilhelmy method. The electrical conductivity, λ, began to increase at time to after the wetting liquid-fibrous assembly contact and reached a constant value. By comparing the experimental λ - t curve with the curve calculated by the Washburn equation, the capillary distribution of the fibrous assembly was determined. The to value as a measure of the penetration rate increased with increasing volume ratio of ethanol in the water/ethanol mixtures for the untreated and APTES-treated silica fibrous assemblies. This indicates that the addition of ethanol to the wetting liquid decreased the penetration rate. In the case of the MTES-treated silic...