Tarzynska Nina, Bednarowicz Anna, Pabjanczyk-Wlazlo Ewelina, Draczyński Zbigniew
Institute of Materials Science of Textiles and Polymer Composites, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
Materials (Basel). 2022 Jun 18;15(12):4321. doi: 10.3390/ma15124321.
This paper presents a method for the synthesis of ammonium alginate by interphase gas-solid reaction. It was confirmed by FTIR ATR spectroscopy analysis that a full substitution of acid groups by ammonium groups on the surface of powdered alginic acid was performed. Comparative studies on the properties of ammonium alginate solutions obtained by interphase reaction with those prepared by the classical method of dissolving alginic acid in an ammonia solution showed that the rheological properties of the solutions from these two derivatives do not differ significantly. Moreover, it was shown that aqueous solutions of ammonium alginate are more stable over time than solutions of sodium alginate. It was confirmed that ammonium alginate and sodium alginate are typical polyelectrolytes, as the addition of a low molecular weight electrolyte to their solutions resulted in a decrease in viscosity.
本文提出了一种通过相间气-固反应合成海藻酸铵的方法。通过傅里叶变换红外光谱衰减全反射（FTIR ATR）分析证实，粉末状海藻酸表面的酸性基团已被铵基团完全取代。对通过相间反应得到的海藻酸铵溶液与通过将海藻酸溶解在氨溶液中的经典方法制备的海藻酸铵溶液的性质进行比较研究表明，这两种衍生物溶液的流变性质没有显著差异。此外，研究表明，海藻酸铵水溶液随时间的稳定性比海藻酸钠溶液更高。已证实海藻酸铵和海藻酸钠是典型的聚电解质，因为向它们的溶液中添加低分子量电解质会导致粘度降低。
