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首页> 外文会议>International Conference on Manufacturing Science and Engineering >Preparation of PS@SiO_2, PS@TiO_2，PS@TiO_2/SiO_2 Core-Shell Composites by a Spray Drying Process and Their Hollow Spheres after Removing PS Cores by Calcinations
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Preparation of PS@SiO_2, PS@TiO_2，PS@TiO_2/SiO_2 Core-Shell Composites by a Spray Drying Process and Their Hollow Spheres after Removing PS Cores by Calcinations

机译：在通过煅烧后去除PS核心后，通过喷雾干燥过程和它们的空心球形制备PS @ SiO_2，PS @ TiO_2，PS @ TiO_2 / SiO_2核心壳复合材料

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Polystyrene (PS) spheres encapsulated core-shell composites of SiO_2 or TiO_2 nanoparticles were prepared by the spray drying technique and hollow spheres of SiO_2 or TiO_2 nanoparticles were then derived by removing the PS cores with calcinations. The PS spheres were dispersed into the SiO_2 or TiO_2 colloids, forming a suspension and then the suspensions were sprayed to form micrometer-sized droplets, as the droplets rush through the drying chamber, the PS spheres were encapsulated into the core of SiO_2 or TiO_2 particles due to the high temperatures and the instant evaporation, obtaining PS@SiO_2, PS@TiO_2 or PS@SiO_2/TiO_2 core-shell composites. After removing the PS core by calcination at 550°C, SiO_2 or TiO_2 hollow spheres were then derived. The influence of drying temperature, the concentration of the SiO_2 or TiO_2 particles and the ratio of PS sphere to the particles on the structures and specific surface area of the hollow spheres were studied with scanning electron microscopy (SEM) and nitrogen adsorption-desorption measurements.
机译：聚苯乙烯（PS）球体通过喷雾干燥技术制备SiO_2或TiO_2纳米粒子的核 - 壳复合材料，然后通过用煅烧除去PS核来衍生SiO_2或TiO_2纳米颗粒的中空球。将PS球体分散到SiO_2或TiO_2胶体中，形成悬浮液，然后喷涂悬浮液以形成微米尺寸的液滴，因为液滴撞到干燥室，将PS球体包封成SiO_2或TiO_2颗粒的核心由于高温和即时蒸发，获得PS @ SiO_2，PS @ TiO_2或PS @ SiO_2 / TiO_2核心壳复合材料。通过在550℃下煅烧去除PS核，然后衍生SiO_2或TiO_2中空球。用扫描电子显微镜（SEM）和氮吸附 - 解吸测量，研究了干燥温度，SiO_2或TiO_2颗粒的颗粒与PS球的浓度与PS球的比例和PS球的比例。

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