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通常认为氢键键合是普遍存在的吸附机理 ,而氢键键合对选择性吸附是有害的。通过对氢键键能及其与表面分子结构关系的研究 ,有可能对选矿中的表面活性剂、高分子絮凝剂、抑制剂和分散剂等的吸附建立新的控制方法。对Stober硅石 /聚环氧烷 (一种能形成氢键的聚合物 )的模型体系进行了研究。考查了两种不同表面处理方法 (焙烧硅石与再水合硅石 )对两种分子量不同聚合物吸附的影响。傅里叶变换红外光谱 (FTIR)、核磁共振 (NMR)和拉曼光谱等表面分析表明 ,吸附行为与矿物表面结构相关。本文讨论了氢键质点和表面结构对竞争 (选择性 )吸附的影响
It is generally accepted that hydrogen bonding is a ubiquitous adsorption mechanism whereas hydrogen bonding is detrimental to selective adsorption. Through the study of hydrogen bond energy and its relationship with surface molecular structure, it is possible to establish a new control method for the adsorption of surfactants, high molecular flocculants, inhibitors and dispersants in mineral processing. The model system of Stober silica / polyalkylene oxide, a polymer capable of hydrogen bonding, was investigated. The effects of two different surface treatments (calcined silica and rehydrated silica) on the adsorption of two polymers of different molecular weights were investigated. Surface analysis by FTIR, NMR and Raman spectroscopy showed that the adsorption behavior was related to the surface structure of minerals. This paper discusses the effect of hydrogen bonding sites and surface structures on competitive (selective) adsorption