Synthesis of BaSO4 nanoparticles by double microemulsion method

doi:10.11949/j.issn.0438-1157.20171265

Abstract

Abstract:

Uniform nano BaSO₄ quasispheres were prepared by precipitation reaction with barium chloride and sodium sulfate as raw materials in reverse microemulsion composed of aqueous solution/TritonX-100/n-hexanol/cyclohexane. The product was characterized by XRD (X-ray diffraction), SEM (scanning electron microscope), TEM (transmission electron microscope) and FTIR (Fourier transform infrared spectroscopy). The effects of three reaction modes,[H₂O]/[Triton X-100] molar ratio (R), reactant concentration and[co-surfactants]/[surfactants] molar ratio (P) on the size and morphology of BaSO₄ quasispheres were investigated. At the same time, the effects of the R on the size and size distribution of micro-emulsion droplets were investigated by dynamic light scattering (DLS). The results show that under room temperature, using double microemulsion method, R=17.97, P between 2.11-4.22 is the best reaction condition for the synthesis of BaSO₄ quasispheres, and the reactant concentration had little effect on the size and morphology of BaSO₄ quasispheres. Under the reaction conditions, the size of BaSO₄ nano-quasispheres was 18-22 nm, and the yield was 87.5%.

Key words: reverse microemulsion, nanoparticles, uniform, quasispheres, synthesis, size distribution

摘要：

在水溶液/TritonX-100/正己醇/环己烷组成的反相微乳液中，以氯化钡和硫酸钠为原料，通过沉淀反应，制备出类球形BaSO₄纳米颗粒，并通过XRD、SEM、TEM、FTIR对其进行表征。考察了三种反应方式、水/TritonX-100摩尔比（R）、反应物浓度以及助表面活性剂/表面活性剂摩尔比（P）对纳米BaSO₄颗粒大小和形貌的影响。同时考察了R对微乳液液滴大小和粒径分布的影响，并通过动态光散射技术（DLS）对微乳液液滴进行测定。实验结果表明：室温条件下，采用双微乳液法，R=17.97，P在2.11～4.22之间是纳米BaSO₄颗粒合成的最佳反应条件，反应物浓度对BaSO₄颗粒的大小和形貌几乎没有影响。在该反应条件下，合成出的类球形BaSO₄粒径为18～22 nm，产率可达87.5%。

关键词: 反相微乳液, 纳米粒子, 均一粒径, 类球形, 合成, 粒度分布

CLC Number:

TQ027

YE Feifei, GUO Xiaoyan, HOU Jing, LIU Xu, WANG Liangliang, WANG Ziyu, JIN Haibo. Synthesis of BaSO₄ nanoparticles by double microemulsion method[J]. CIESC Journal, 2018, 69(6): 2767-2774.

叶飞飞, 郭晓燕, 侯静, 刘旭, 汪亮亮, 王梓宇, 靳海波. 双微乳液法制备纳米硫酸钡颗粒[J]. 化工学报, 2018, 69(6): 2767-2774.

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Synthesis of BaSO₄ nanoparticles by double microemulsion method

双微乳液法制备纳米硫酸钡颗粒

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