Acceleration of dispersing calcium carbonate particle in aqueous media using jet milling method
Acceleration of dispersing calcium carbonate particle in aqueous media using jet milling method
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DOI：
10.1016/j.colsurfa.2017.02.010
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发表时间：
2017-05-05
影响因子：
5.2
通讯作者：
Fujimoto, Toshiyuki
中科院分区：
文献类型：
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作者：
Kato, Haruhisa;Nakamura, Ayako;Fujimoto, Toshiyuki
将颗粒悬浮在液体中是制备各种功能纳米产品的关键。采用超声和气流粉碎两种方法在水相悬浮液中制备了碳酸钙颗粒，并用多种手段对其进行了表征。用聚乙二醇对(1，1，3，3-四甲基丁基)苯基醚(Triton X-100)、聚氧乙烯(23)十二烷基醚(Brij35)、聚氧乙烯烷基醚(Softano170)和十二烷基硫酸钠(SDS)等工业表面活性剂制备了CaCO3粒子在水介质中的悬浮液。根据动态光散射和不对称流场流动分级评价，无论采用超声分散还是气流粉碎分散方法，当使用Triton X-100或Softanol 70作为表面活性剂时，分散的CaCO3颗粒明显较小，尽管分散方法不同，分散的CaCO3颗粒的尺寸分布也不同。观测到的CaCO3粒子在不同表面活性剂溶液中的Zeta电位支持Triton X-100和Softano170是水介质中CaCO3粒子的良好分散剂，因为它们具有较大的静电排斥相互作用。脉冲梯度核磁共振(PFG-核磁共振)结果表明，气流粉碎促进了CaCO3颗粒与表面活性剂分子之间的相互作用/吸附，比超声更有效地分散了团聚/团聚的CaCO3颗粒。此外，有趣的是，我们发现Softanol70作为水介质中CaCO3颗粒的分散剂，无论是在超声波作用下还是在气流粉碎作用下，都能很好地发挥作用，正如PFG-NMR评估所表明的那样。(C)2017爱思唯尔B.V.保留所有权利。
Suspending particles in a liquid phase is a key to producing various functional nano products. We prepared calcium carbonate (CaCO3) particles in aqueous suspension using two methods, ultrasonication and jet milling, and characterized them using various techniques. Suspensions of CaCO3 particles in aqueous media were prepared with different industrial surfactants: polyethylene glycol p-(1,1,3,3,-tetramethylbutyl)-phenyl ether (Triton X-100), polyoxyethylene(23) lauryl ether (Brij35), polyoxyethylene alkylether (Softano170), and sodium dodecyl sulfate (SDS). According to dynamic light scattering and asymmetric flow field-flow fractionation assessments, the dispersed CaCO3 particles are clearly small when Triton X-100 or Softanol 70 is used as the surfactant regardless of whether ultrasonication or jet milling was used as the dispersion method, although the size distribution of the particles varies depending on the dispersion method. The observed zeta potentials of the CaCO3 particles in various surfactant solutions support the finding that Triton X-100 and Softano170 are good dispersants for CaCO3 particles in aqueous media because of their larger electrostatic repulsion interaction. Pulsed field gradient nuclear magnetic resonance (PFG-NMR) indicated that jet milling accelerates interaction/adsorption between CaCO3 particles and surfactant molecules, so it disperses the aggregated/agglomerated CaCO3 particles more effectively than ultrasonication. In addition, interestingly, we found that Softanol70 worked well as a dispersant for CaCO3 particles in aqueous media for both ultrasonication and jet milling, as indicated by the PFG-NMR assessment. (C) 2017 Elsevier B.V. All rights reserved.