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首页> 外文期刊>Journal of Applied Polymer Science >Cellulose triacetate/LUDOX-SiO(2)nanocomposite for synthesis of pervaporation desalination membranes
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Cellulose triacetate/LUDOX-SiO(2)nanocomposite for synthesis of pervaporation desalination membranes

机译：纤维素三乙酸/ Ludox-SiO（2）纳米复合材料用于合成普化蒸发脱盐膜

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摘要

A series of cellulose triacetate/Ludox-silica nancomposite pervaporation membranes was successfully prepared via solution casting, aiming to improve the performance of cellulose triacetate membranes for desalination. The fabricated nanocomposite membranes were characterized to study the membrane morphology, chemical composition, mechanical properties, and surface hydrophilicity. Furthermore, the desalination performance was investigated as a function of silica (SiO2) loading (ranging from 1 to 4 wt%) and feed concentration at 30 and 60 g/L of sodium chloride (NaCl). Pervaporation experiments showed that incorporating 4 wt% SiO(2)into a cellulose triacetate (CTA) membrane increased the water flux by a factor 2.5 compared with pristine CTA (from 2.2 to 6.1 kg m(-2)h(-1)) for a 30 g/L NaCl feed solution at 70 degrees C, while the salt rejection remained above 99%. The CTA/4 wt% SiO(2)membrane was found to have only 21% flux reduction when tested with a 60 g/L NaCl feed solution, without changes in membrane selectivity. This suggests that the developed CTA/Ludox-SiO(2)nanocomposite pervaporation membrane is suitable for desalination.
机译：为了提高三醋酸纤维素膜的脱盐性能，采用溶液浇铸法制备了一系列三醋酸纤维素/Ludox-SiO2纳米复合渗透汽化膜。对制备的纳米复合膜进行了表征，以研究膜的形态、化学成分、机械性能和表面亲水性。此外，还研究了脱盐性能与二氧化硅（SiO2）负载量（1-4 wt%）以及30和60 g/L氯化钠（NaCl）下的进料浓度的关系。渗透汽化实验表明，在70℃下，在30 g/L NaCl进料溶液中，将4 wt%的SiO（2）加入到三醋酸纤维素（CTA）膜中，与原始CTA（从2.2到6.1 kg m（-2）h（-1））相比，水通量增加了2.5倍，而盐截留率保持在99%以上。当使用60 g/L NaCl进料溶液测试时，发现CTA/4 wt%SiO 2膜的通量仅减少21%，而膜选择性没有变化。这表明所研制的CTA/Ludox-SiO 2纳米复合渗透汽化膜适用于海水淡化。

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