Institute of Chemistry, University of the Punjab, Lahore 54590, Pakistan.
Institute of Polymer and Textile Engineering, University of the Punjab, Lahore 54590, Pakistan.
Int J Mol Sci. 2021 Feb 25;22(5):2290. doi: 10.3390/ijms22052290.
Chitosan and polyethylene glycol (PEG-600) membranes were synthesized and crosslinked with 3-aminopropyltriethoxysilane (APTES). The main purpose of this research work is to synthesize RO membranes which can be used to provide desalinated water for drinking, industrial and agricultural purposes. Hydrogen bonding between chitosan and PEG was confirmed by displacement of the hydroxyl absorption peak at 3237 cm in pure chitosan to lower values in crosslinked membranes by using FTIR. Dynamic mechanical analysis revealed that PEG lowers Tg of the modified membranes vs. pure chitosan from 128.5 °C in control to 120 °C in CS-PEG5. SEM results highlighted porous and anisotropic structure of crosslinked membranes. As the amount of PEG was increased, hydrophilicity of membranes was increased and water absorption increased up to a maximum of 67.34%. Permeation data showed that flux and salt rejection value of the modified membranes was increased up to a maximum of 80% and 40.4%, respectively. Modified films have antibacterial properties against Escherichia coli as compared to control membranes.
壳聚糖和聚乙二醇（PEG-600）膜被合成并用 3-氨丙基三乙氧基硅烷（APTES）交联。这项研究工作的主要目的是合成反渗透膜，可用于提供饮用水、工业和农业用途的淡化水。通过傅里叶变换红外光谱（FTIR），可以证实壳聚糖和 PEG 之间存在氢键，因为在纯壳聚糖中，羟基吸收峰 3237cm 被转移到交联膜的较低值。动态力学分析表明，与纯壳聚糖相比，PEG 降低了改性膜的玻璃化转变温度（Tg），从对照样品中的 128.5°C 降低到 CS-PEG5 中的 120°C。SEM 结果突出显示交联膜的多孔和各向异性结构。随着 PEG 用量的增加，膜的亲水性增加，吸水率增加到最大值 67.34%。渗透数据表明，改性膜的通量和盐截留率分别提高到最大值 80%和 40.4%。与对照膜相比，改性膜对大肠杆菌具有抗菌性能。
