Department of Wood and Paper Science and Technology, Natural Resources Faculty, University of Tehran, Karaj, Iran.
Department of Wood and Paper Science and Technology, Natural Resources Faculty, University of Tehran, Karaj, Iran.
Carbohydr Polym. 2020 Feb 15;230:115571. doi: 10.1016/j.carbpol.2019.115571. Epub 2019 Nov 6.
A novel process of using phthalimide to modify cellulose nanofibers (CNF) for CO adsorption was studied. The effectiveness of the modification was confirmed by ATR-IR. Phthalimide incorporation onto CNF was confirmed with the characteristic peaks of NH, C-N, and ester bonding COO was observable. The XPS analyses confirmed the presence of N1s peak in Ph-CNF, meaning that the hydroxyl groups reacted with the amino groups (NH) of phthalimide on the CNF surface. Based on the results, surface modification and addition of phthalimide increased the specific surface area, but also decreased the overall porosity, size of pores and volume of pores. When the temperature, humidity, pressure, and airflow rate increased, the CO adsorption significantly increased. The CO adsorption of phthalimide-modified CNF was confirmed by ATR-IR spectroscopy as the characteristic peaks of HCO,NH and ester bonding NCOO were visible on the spectra.
研究了一种使用邻苯二甲酰亚胺对纤维素纳米纤维（CNF）进行 CO 吸附的新方法。通过 ATR-IR 证实了修饰的有效性。通过可观察到 NH、C-N 和酯键 COO 的特征峰，证实了邻苯二甲酰亚胺掺入 CNF 中。XPS 分析证实了 Ph-CNF 中存在 N1s 峰，这意味着羟基与 CNF 表面上邻苯二甲酰亚胺的氨基（NH）反应。基于这些结果，表面修饰和添加邻苯二甲酰亚胺增加了比表面积，但也降低了总孔隙率、孔径和孔体积。当温度、湿度、压力和空气流速增加时，CO 的吸附量显著增加。ATR-IR 光谱证实了 CNF 经邻苯二甲酰亚胺改性后的 CO 吸附，因为在光谱中可以看到 HCO、NH 和酯键 NCOO 的特征峰。
