Department of Chemical Engineering, Yasooj Branch, Islamic Azad University, Yasooj, Iran.
Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia.
Carbohydr Polym. 2019 Dec 1;225:115212. doi: 10.1016/j.carbpol.2019.115212. Epub 2019 Aug 18.
In this work, nanocomposite ultrafiltration (UF) membranes were synthesized through addition of different quantities of amino-functionalized nanocrystalline cellulose (NCs) in order to improve membrane anti-fouling resistance against oil depositions. The characterization results demonstrated that the overall porosity and hydrophilicity of the membranes were improved significantly upon addition of NCs despite a decrease in the pore size of nanocomposite membranes. The UF performance results showed that the nanocomposite membrane incorporated with 1 wt% NCs achieved an optimal water flux improvement, i.e., approximately 43% higher than the pristine membrane. Such nanocomposite membrane also exhibited promising oil rejection (>98.2%) and excellent water flux recovery rate of ˜98% and ˜85% after one and four cycles of treating 250-ppm oil-in-water emulsion solution, respectively. The desirable anti-fouling properties of nanocomposite membrane can be attributed to the existence of hydrophilic functional groups (-OH) on the surface of membrane stemming from addition of NCs that renders the membrane less vulnerable to fouling during oil-in-water emulsion treatment.
在这项工作中，通过在纳米复合超滤（UF）膜中添加不同量的氨基功能化纳米纤维素（NCs），以提高膜抗油沉积污染的能力。表征结果表明，尽管纳米复合膜的孔径有所减小，但NCs 的添加显著提高了膜的总孔隙率和亲水性。超滤性能结果表明，添加 1wt% NCs 的纳米复合膜的水通量得到了最佳的改善，即比原始膜高约 43%。这种纳米复合膜在处理 250ppm 的油水乳液溶液时，还表现出优异的油截留率（>98.2%）和良好的水通量恢复率（分别约为 98%和 85%），在经过 1 次和 4 次循环后。纳米复合膜具有良好的抗污染性能，这归因于 NCs 的添加使膜表面存在亲水性官能团（-OH），从而使膜在处理油水乳液时不易受到污染。
