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首页> 外文期刊>Journal of Membrane Science >Surface modification of cardo polyetherketone ultrafiltration membrane by photo-grafted copolymers to obtain nanofiltration membranes
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Surface modification of cardo polyetherketone ultrafiltration membrane by photo-grafted copolymers to obtain nanofiltration membranes

机译：通过光接枝共聚物对Cardo聚醚酮超滤膜进行表面改性以获得纳米滤膜

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摘要

Hydrophilic nanofiltration membranes were prepared by grafting hydrophilic copolymers onto surface of ultrafiltration membranes. The method consists of a UV irradiation followed by an in situ graft co-polymerization of water soluble monomers on the membranes made of cardo polyetherketone (PEK-C). The effect of irradiation time and monomer nature on the membrane performance was investigated. Analysis by Fourier transform infrared in attenuated total reflection mode, contact angles and scanning electron microscopy of the membrane surface showed that the grafting degree and their hydrophilicity increase with irradiation time. The co-polymerization of hydrophilic monomers yielded better nanofiltration membranes, i.e. with higher permeation flux. The water flux through a membrane grafted for 10 min at a 5.2 mW cm~(-2) UV-irradiation power changed from 1.46 L m~(-2) h~(-1) for poly(acrylic acid) to 9.69 L m~(-2) h~(-1) poly(acrylic acid-co-sodium allyl sulfonate) under a driving pressure of 0.2 MPa, for the sodium sulfate retention of 75%.
机译：通过将亲水性共聚物接枝到超滤膜表面制备亲水性纳滤膜。该方法包括紫外线照射，然后将水溶性单体在由Cardo聚醚酮（PEK-C）制成的膜上进行原位接枝共聚。研究了辐照时间和单体性质对膜性能的影响。傅里叶变换红外光谱在衰减全反射模式，接触角和膜表面扫描电子显微镜的分析表明，接枝度及其亲水性随照射时间的增加而增加。亲水性单体的共聚产生更好的纳滤膜，即具有更高的渗透通量。在5.2 mW cm〜（-2）的UV辐射功率下通过接枝10分钟的膜的水通量从聚丙烯酸的1.46 L m〜（-2）h〜（-1）变为9.69 L m在0.2MPa的驱动压力下〜（-2）h〜（-1）聚（丙烯酸-共烯丙基磺酸钠），硫酸钠保留率为75％。

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