Comparison of three silane compounds to impart water repellency in an industrial sand
Comparison of three silane compounds to impart water repellency in an industrial sand
复制标题
三种硅烷化合物在工业砂中赋予防水性的比较
DOI：
10.1680/jgele.16.00097
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发表时间：
2016
影响因子：
2.1
通讯作者：
S. Lourenço
中科院分区：
文献类型：
--
作者：
C. Chan;S. Lourenço
防水颗粒材料已在集水应用中进行了测试，并建议用作垃圾填埋场和斜坡覆盖物。为了达到防水性，砂粒上涂有蜡、油或硅烷。本文重点介绍硅烷，因为它们广泛用于玻璃涂层应用，因此适用于硅酸盐矿物，以实现高度的防水性。在中型砂上测试了三种硅烷化合物：二甲基二氯硅烷（DCDMS）、十八烷基三氯硅烷（OTS）和三甲基氯硅烷。目的是（a）确定达到最高拒水性所需的最低浓度，（B）确保其处理后的稳定性，和（c）确定增强拒水性的潜在条件或因素。结果表明，硅烷的加入量为土质量的0.001%时，处理砂的拒水性达到最大值，其中OTS最高（138°），DCDMS最低。
Water repellent granular materials have been tested in water harvesting applications and proposed as landfill and slope covers. To achieve water repellency, sand particles are coated with waxes, oils or silanes. This paper focuses on silanes because they are widely used in glass coating applications, and thus pertinent for use on silicate minerals for enabling a high degree of water repellency to be attained. Three silane compounds were tested on medium-sized sand: dichlorodimethylsilane (DCDMS), octadecyltrichlorosilane (OTS) and trimethylchlorosilane. The aim was (a) to identify the minimum concentrations required to achieve the highest degree of water repellency, (b) to ensure its stability after treatment and (c) to determine potential conditions or factors to enhance water repellency. The results revealed that only a small amount of silanes, 0·001% by soil mass, was required for the treated sands to reach the maximum degree of water repellency with OTS achieving the highest (138°) and DCDMS the lowes...