Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China.
Center for Molecular Metabolism, Nanjing University of Science & Technology, Nanjing 210094, China.
Colloids Surf B Biointerfaces. 2018 Oct 1;170:364-372. doi: 10.1016/j.colsurfb.2018.06.036. Epub 2018 Jun 19.
With advances in soft material design and engineering, naturally resourced polysaccharides have frequently been used to construct hydrogels because of their unique properties such as renewability, biodegradability and biocompatibility. In this work, we use a water-soluble microbial polysaccharide, salecan as a trapped natural polymer, poly(acrylamide-co-diallyldimethylammonium chloride) (PAD) as a functional matrix to prepare salecan/PAD hydrogels through a facile one-pot method. We employed a variety of spectroscopic techniques to probe the physicochemical properties of the designed hydrogels. The results demonstrated that salecan not only tuned the polarity of the PAD hydrogels, but also endowed them with adjustable water content. Subsequently, the adsorption performance of these hydrogels to methyl orange (MO) dye was investigated in detail. It was found that the salecan/PAD had the ability to remove MO from the surrounding aqueous solutions. In addition, adsorption kinetic data were nicely described by pseudo-second-order model and the adsorption isotherm data fitted well with the Freundlich equation. Having tailorable physicochemical properties coupled with the ability to uptake dye, these salecan-incorporated hydrogels could be promising platform for wastewater treatment and removal of heavy metal ions.
随着软物质设计和工程的进步，天然资源多糖由于其独特的可再生性、生物降解性和生物相容性等特性，经常被用于构建水凝胶。在这项工作中，我们使用一种水溶性微生物多糖——沙菜聚糖作为被捕获的天然聚合物，将聚（丙烯酰胺-co-二烯丙基二甲基氯化铵）（PAD）作为功能基质，通过简便的一锅法制备沙菜聚糖/PAD 水凝胶。我们采用多种光谱技术来探测设计水凝胶的物理化学性质。结果表明，沙菜聚糖不仅可以调节 PAD 水凝胶的极性，还可以赋予其可调的含水量。随后，详细研究了这些水凝胶对甲基橙（MO）染料的吸附性能。结果发现，沙菜聚糖/PAD 具有从周围水溶液中去除 MO 的能力。此外，吸附动力学数据很好地符合拟二级模型，吸附等温线数据很好地符合 Freundlich 方程。这些具有可调节物理化学性质和吸收染料能力的沙菜聚糖复合水凝胶，可能是废水处理和去除重金属离子的有前途的平台。
