In this work, cellulose nanocrystals (CNC) derived from sawdust were successfully incorporated into a thin film composite membrane made from polyamide. The characteristics of unmodified and modified membranes were investigated using FT-IR, XRD, TGA, SEM, EDX, AFM and contact angle measurement. The membranes’ performances were evaluated using a dead-end test cell with sodium chloride (1500 ppm) and calcium chloride (2500 ppm) solutions. FT-IR and XRD analyses revealed that polymerization took place during the incorporation of the cellulose nanocrystals. From EDX analysis, it was found that incorporation of CNC into the membrane resulted in an increase in the oxygen content both at the atomic and mass levels. SEM and AFM images revealed dense and tight structures for both modified and unmodified membranes. The modified membrane was more hydrophilic and rougher than the unmodified membrane. The water flux was significantly increased (more than 23%) while maintaining high rejection rate values for sodium chloride (98.3 ± 0.8%) and calcium chloride (97.1 ± 0.5%). Furthermore, there was also an increase in the thermal stability of the membrane. The results, therefore, have shown a great prospect in the development of thin-film nanocomposite membranes using sawdust-derived cellulose nanocrystals incorporated in polyamide.

在这项工作中，将木屑衍生的纤维素纳米晶体（CNC）成功地掺入了聚酰胺制成的薄膜复合膜中。使用FT-IR，XRD，TGA，SEM，EDX，AFM和接触角测量研究了未改性和改性膜的特性。使用具有氯化钠（1500 ppm）和氯化钙（2500 ppm）溶液的末端测试池评估膜的性能。FT-IR和XRD分析表明聚合反应是在纤维素纳米晶体掺入过程中发生的。从EDX分析中发现，将CNC掺入膜中会导致原子含量和质量含量的氧含量增加。SEM和AFM图像显示出改性膜和未改性膜的致密紧密结构。改性膜比未改性膜更亲水且更粗糙。水通量显着增加（超过23％），同时保持较高的氯化钠（98.3±0.8％）和氯化钙（97.1±0.5％）的拒绝率。此外，膜的热稳定性也增加。因此，该结果在使用掺入聚酰胺中的木屑衍生的纤维素纳米晶体的薄膜纳米复合膜的开发中显示了广阔的前景。