为了改善聚偏氟乙烯(PVDF)超滤膜的性能,将合成的强亲水性纳米材料磺化氧化石墨烯(SGO)作为改性剂,聚乙二醇2000为致孔剂制备了SGO/PVDF复合超滤膜。通过傅里叶变换红外光谱仪、X射线光电子能谱仪、扫描电子显微镜、原子力显微镜和接触角测量仪表征和测量了SGO和SGO/PVDF复合超滤膜的结构、形貌、平均粗糙度和接触角,以SGO添加量为变量,测试了复合超滤膜的纯水通量、截留性能和抗污染性能。结果表明:当SGO添加量为0.3%(wt,质量分数,下同)时,SGO/PVDF复合超滤膜的纯水通量为25.07L/(m2·h),牛血清白蛋白截留率为97.21%,通量恢复率为93.90%;当SGO添加量为0.4%时,5min内复合超滤膜对Pb2+的截留高达75.20%。
To enhance the performance of polyvinylidene fluoride (PVDF) ultrafiltration membranes,sulfonated graphene oxide (SGO),a synthesized strongly hydrophilic nanomaterial,was utilized as a modifier to prepare SGO/PVDF composite ultrafiltration membranes using polyethylene glycol 2000 (PEG-2000) as the pore-forming agent.The structure,morphology,average roughness,and contact angle of both SGO and the SGO/PVDF composite membranes were characterized and measured using Fourier transform infrared spectroscopy (FT-IR),X-ray photoelectron spectroscopy (XPS),scanning electron microscopy (SEM),atomic force microscopy (AFM),and contact angle measurement.The pure water flux,rejection performance,and antifouling properties of the composite membranes were evaluated with the SGO addition amount as the variable.The results demonstrated that:when SGO addition was 0.3wt% (same below),the composite membrane exhibited a pure water flux of 25.07L/(m2·h),a bovine serum albumin (BSA) rejection rate of 97.21%,and a flux recovery ratio of 93.90%.When the SGO addition was 0.4wt%,the membrane achieved a high Pb2+ rejection rate of 75.20% within 5min.
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基金资助
广东省重点领域研发计划(2023B0101010002);国家自然科学基金(42007175)
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