'Ilie Murgulescu' Institute of Physical Chemistry, Romanian Academy, Spl. Independenţei 202, Sector 6, 060021, Bucharest, Romania.
'Ilie Murgulescu' Institute of Physical Chemistry, Romanian Academy, Spl. Independenţei 202, Sector 6, 060021, Bucharest, Romania.
Carbohydr Polym. 2020 Oct 15;246:116571. doi: 10.1016/j.carbpol.2020.116571. Epub 2020 Jun 12.
The study sheds light on the interaction between chitosan (Ch) and polyglycidol (PGL) and uses their interpolymer complex in hydrophilic coating of iron oxide particles (M). Preliminary investigations were performed by modeling chitosan and polyglycidol chains interactions using coarse grained beads approximation and molecular dynamics simulations. The results revealed that Ch and PGL chains associate together forming weak strength complexes, which was experimentally confirmed by surface tension, fluorescence and FTIR. The Ch-PGL mixture (C) and sodium dodecylsulfate (S) were used for layer-by-layer preparation of hydrophilic multilayer coatings of M. The successful covering, demonstrated by DLS, Zeta potential, FTIR, EDAX, preserved the particles super-paramagnetic properties. The most stable multilayer nanocomposite (MSCS) efficiently adsorbed methylene blue from water. The Freundlich model fitted well the equilibrium isotherm data, indicating a heterogeneous, multilayer adsorption. Benefiting from both nano-size and magnetic properties, this adsorbent could be an effectively, cheaply and eco-friendly wastewater treatment means.
该研究揭示了壳聚糖（Ch）和聚环氧丙烷（PGL）之间的相互作用，并在氧化铁颗粒（M）的亲水涂层中使用它们的聚合物复合物。通过使用粗粒度珠近似和分子动力学模拟对壳聚糖和聚环氧丙烷链相互作用进行了初步研究。结果表明，Ch 和 PGL 链彼此结合形成弱强度复合物，这通过表面张力、荧光和 FTIR 实验得到证实。Ch-PGL 混合物（C）和十二烷基硫酸钠（S）用于 M 的亲水多层涂层的逐层制备。通过 DLS、Zeta 电位、FTIR、EDAX 证明成功覆盖，保留了颗粒超顺磁性。最稳定的多层纳米复合材料（MSCS）可有效地从水中吸附亚甲基蓝。Freundlich 模型很好地拟合了平衡等温线数据，表明存在不均匀的多层吸附。由于纳米尺寸和磁性，这种吸附剂可能是一种有效、廉价且环保的废水处理方法。
