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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Effect of Mineral Surface Properties on Water Behaviors in Pores Constructed by Calcite and Silica Particles
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Effect of Mineral Surface Properties on Water Behaviors in Pores Constructed by Calcite and Silica Particles

机译：矿物表面性质对方解石和二氧化硅颗粒构建孔中水行为的影响

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摘要

Water confined in the pore space has different behaviors than bulk water, and the minerals constructing the pores will affect water properties. In this paper, the relaxation characteristics of water filling in the pores of calcite and silica powders (45-74 mu m) at various saturation levels are studied by a low-field nuclear magnetic resonance instrument. Results show that water in calcite and silica powders has different T-2 relaxation behaviors. Based on the results of X-ray computed tomography scanning of pore structures, contact angle measurement, and time-of flight secondary ion mass spectrometry analysis of surface functional clusters, this phenomenon is ascribed to the different status of hydroxyl groups as the interstitial hydroxyl ion because of the formation of the bicarbonate ion by either the interaction of water with the carbonate ion or bounding with -Si at the silica surface. Such differences lead to water behaving differently in the pores constructed with calcite and silica particles.
机译：狭窄在孔隙空间内的水具有不同的行为，而不是散装水，并且构建毛孔的矿物将影响水性。本文采用低场核磁共振仪研究了各种饱和水平的煤矿和二氧化硅粉末（二氧化硅粉末孔（45-74μm）的水填充的弛豫特性。结果表明，方解石和二氧化硅粉的水有不同的T-2松弛行为。基于孔结构的X射线计算机断层扫描的结果，接触角测量和飞行时间二次离子质谱分析表面功能簇，这种现象归因于羟基的不同状态作为间质羟基离子由于通过水与碳酸酯离子的相互作用形成碳酸氢盐离子或在二氧化硅表面的-Si与-SI的界定。这种差异导致用方解石和二氧化硅颗粒构成的孔中的水分不同。

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