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首页> 外文期刊>RSC Advances >Use of CS-PAA nanoparticles as an alternative to metal oxide nanoparticles and their effect on fouling mitigation of a PSF ultrafiltration membrane
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Use of CS-PAA nanoparticles as an alternative to metal oxide nanoparticles and their effect on fouling mitigation of a PSF ultrafiltration membrane

机译：CS-PAA纳米颗粒作为金属氧化物纳米颗粒的替代物及其对减轻PSF超滤膜结垢的影响

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摘要

This study deals with the synthesis and characterization of cross linked chitosan polyacrylic acid (CS-PAA) nanoparticles. Phase inversion method was used to prepare the blended polysulfone (PSF) membranes with CS-PAA nanoparticles. Field emission scanning electron microscopy (FESEM) and attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) measurements were performed to confirm the presence and dispersion of the CS-PAA nanoparticles in the blended membranes. Modified membranes exhibited superior pore size, pure water flux, hydraulic permeability and fouling resistance compared to the plain membrane. Morphology of the modified membranes was changed noticeably with an increased quantity of nanoparticles. Hydrophilicity and fouling resistance behaviour of the fabricated membranes were evaluated in terms of water contact angle and BSA adsorption, respectively. Hydraulic permeability was also determined and it was improved from 0.146 L m(-2) h(-1) kPa to 0.265 L m(-2) h(-1) kPa for the modified membrane compared to the plain membrane. Fouling resistance performance of the modified membrane was estimated by ultrafiltration (UF) of 1000 ppm Bovine serum albumin (BSA) solution. BSA flux was improved from 8.3 to 24.3 L m(-2) h(-1) for modified membranes. The modified membrane reached a maximum flux recovery ratio of around 88% after the BSA UF experiment compared to a 42% flux recovery ratio of the plain membrane.
机译：这项研究涉及交联的壳聚糖聚丙烯酸（CS-PAA）纳米粒子的合成和表征。采用相转化法制备了具有CS-PAA纳米粒子的聚砜膜。进行场发射扫描电子显微镜（FESEM）和衰减全反射-傅立叶变换红外光谱（ATR-FTIR）测量以确认CS-PAA纳米粒子在共混膜中的存在和分散。与普通膜相比，改性膜表现出优异的孔径，纯净水通量，水力渗透性和抗污性。改性膜的形态随着纳米粒子数量的增加而明显改变。分别根据水接触角和BSA吸附性评估了所制备的膜的亲水性和防污性能。还确定了水力渗透性，与普通膜相比，改性膜的渗透性从0.146 L m（-2）h（-1）kPa提高到0.265 L m（-2）h（-1）kPa。通过超滤（UF）1000 ppm牛血清白蛋白（BSA）溶液评估改性膜的抗污性能。改性膜的BSA通量从8.3升至24.3 L m（-2）h（-1）。经过BSA UF实验后，改性膜的最大通量回收率约为88％，而普通膜的通量回收率仅为42％。

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