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首页> 外文期刊>RSC Advances >Green coating by coordination of tannic acid and iron ions for antioxidant nanofiltration membranes
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Green coating by coordination of tannic acid and iron ions for antioxidant nanofiltration membranes

机译：单宁酸和铁离子配位的绿色涂料用于抗氧化剂纳滤膜

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摘要

A novel green coating method was proposed to prepare composite nanofiltration (NF) membranes without using organic solutions or toxic reagents in the formation of the active layer compared with traditional interfacial polymerization. Tannic acid (TA) and iron(III) chloride (FeCl3) were chosen as the two reactive monomers dissolved in the aqueous phase. The stable metal-polyphenol complex coating was formed via the coordination reaction between TA and iron ions (FeIII) upon porous support. Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and water contact angle were used to characterize the chemical features of the prepared TA-Fe-III/polyethersulfone (PES) composite NF membranes. Scanning electron microscope (SEM) and atomic force microscopy (AFM) were utilized to observe the surface morphologies. The effects of reactive monomer concentration and reaction time on the permeability of water and rejection of dyes and inorganic salts were investigated, respectively. The TA-Fe-III/PES composite NF membranes possessed good structural stability and oxidation resistance ability.
机译：与传统的界面聚合反应相比，提出了一种新型的绿色涂层方法来制备复合纳米过滤膜，而在活性层的形成中不使用有机溶液或有毒试剂。选择单宁酸（TA）和氯化铁（III）（FeCl3）作为溶解在水相中的两种反应性单体。通过多孔载体上TA和铁离子（FeIII）之间的配位反应，形成稳定的金属-多酚复合物涂层。使用傅里叶变换红外（FTIR）光谱，X射线光电子能谱（XPS）和水接触角来表征制备的TA-Fe-III /聚醚砜（PES）复合NF膜的化学特征。利用扫描电子显微镜（SEM）和原子力显微镜（AFM）观察表面形貌。分别研究了反应性单体浓度和反应时间对水的渗透性以及染料和无机盐排阻的影响。 TA-Fe-III / PES复合NF膜具有良好的结构稳定性和抗氧化能力。

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