Liaoning Key Laboratory of Optimization and Utilization of Non-Associated Low-Grade Iron Ore in Benxi, School of Metallurgy Engineering, Liaoning Institute of Science and Technology, Benxi, 117004, China.
Department of Bio-Ceramics, Korea Institute of Ceramic Engineering and Technology, Jinju, 52828, S. Korea.
J Nanosci Nanotechnol. 2019 Feb 1;19(2):984-987. doi: 10.1166/jnn.2019.15931.
Natural halloysite kaolin contains a lot of impurities such as quartz phases and varies in morphology and size during their formation in the earth. So to utilize as a new type of natural nano material, removing quartz impurities from kaolin clays without scathe the tube morphologies are necessary. So to remove quartz impurities from kaolin by forming a well deflocculated aqueous slip without fracturing the morphology of tubes, the slip of homogenized halloysite clay was recovered by adding polyvalent metallic cations and anionic polyelectrolyte flocculants simultaneously to selectively flocculate the mixture of quartz and halloysite, whereby the halloysite particles form floes and the tubular halloysite remains in suspensions. Then, the uniform size and tubular shape of halloysite was obtained which could be suitably used as a container or a carrier to encapsulate nanomaterials.
天然高岭石中含有大量杂质，如石英相，并且在地球形成过程中形态和尺寸也各不相同。因此，要将其用作新型天然纳米材料，必须去除高岭土中的石英杂质而不损害管形态。因此，为了在不破坏管形态的情况下通过形成良好解絮凝的水性浆料来去除高岭石中的石英杂质，通过同时添加多价金属阳离子和阴离子型聚电解质絮凝剂来回收均匀化的埃洛石粘土浆料，以选择性地絮凝石英和埃洛石的混合物，从而使埃洛石颗粒形成絮体，而管状埃洛石则保持悬浮状态。然后，获得了均匀的尺寸和管状形状的埃洛石，可将其用作纳米材料的容器或载体。
