Lim Jeewoo, Jung Unho, Joe Won Tae, Kim Eui Tae, Pyun Jeffrey, Char Kookheon
The National Creative Research Initiative Center for Intelligent Hybrids, The WCU Program of Chemical Convergence for Energy & Environment, School of Chemical & Biological Engineering, Seoul National University, Seoul, 151-744, Republic of Korea.
Department of Chemistry & Biochemistry, The University of Arizona, 1306 East University Boulevard, Tucson, AZ, 85721, USA.
Macromol Rapid Commun. 2015 Jun;36(11):1103-7. doi: 10.1002/marc.201500006. Epub 2015 Apr 7.
Sulfur-rich materials have recently attracted keen interest for their potentials in optical, electrochemical, and pesticidal applications as well as their utility in dynamic covalent bond chemistry. Many sulfur-rich polymers, however, are insoluble and processing methods are therefore very limited. The synthesis and characterization of water-dispersible polymer nanoparticles (NPs) with the sulfur content exceeding 75% by weight, obtained from the interfacial polymerization between 1,2,3-trichloropropane and sodium polysulfide in water is reported here. The interfacial polymerization yields well-defined sulfur-rich NPs in the presence of surfactants, which are capable of serving a dual role as a phase transfer catalyst on top of emulsifiers. Such dual role allows for the control of the product NP size by varying its concentration. The surfactants can be easily removed by centrifugation and redispersion in water is also reported here. The resulting sulfur-rich NPs are characterized through elemental analysis, dynamic light scattering, ζ-potential measurements, and scanning electron microscopy.
富含硫的材料最近因其在光学、电化学和杀虫应用方面的潜力以及在动态共价键化学中的效用而引起了人们的浓厚兴趣。然而，许多富含硫的聚合物是不溶性的，因此加工方法非常有限。本文报道了通过1,2,3 - 三氯丙烷与多硫化钠在水中的界面聚合反应制备的硫含量超过75%（重量）的水分散性聚合物纳米颗粒（NPs）的合成与表征。在表面活性剂存在下，界面聚合反应生成了尺寸明确的富含硫的NPs，这些表面活性剂除了作为乳化剂外，还能够起到相转移催化剂的双重作用。这种双重作用使得通过改变其浓度来控制产物NP的尺寸成为可能。本文还报道了通过离心可以轻松去除表面活性剂，并且所得富含硫的NPs能够在水中重新分散。通过元素分析、动态光散射、ζ电位测量和扫描电子显微镜对所得富含硫的NPs进行了表征。
