Preparation of Multipurpose Polyvinylidene Fluoride Membranes via a Spray-Coating Strategy Using Waterborne Polymers
Preparation of Multipurpose Polyvinylidene Fluoride Membranes via a Spray-Coating Strategy Using Waterborne Polymers
复制标题
使用水性聚合物通过喷涂策略制备多用途聚偏二氟乙烯膜
DOI：
10.1021/acsami.0c18788
复制
发表时间：
2021-01-14
影响因子：
9.5
通讯作者：
Wyman, Ian
中科院分区：
文献类型：
--
作者：
Xing, Jiale;Zhang, Ganwei;Wyman, Ian
如本文所报道的，水性聚合物聚（甲基丙烯酸缩水甘油酯-共-聚（乙二醇）甲基醚甲基丙烯酸酯）P（GMA-co-mPEGMA）和聚乙烯亚胺（PEI）用于通过直接喷涂方法制备多用途聚偏二氟乙烯（PVDF）膜。将P（GMA-co-mPEGMA）和PEI交替喷涂到PVDF膜上以产生稳定的交联共聚物涂层。通过扫描电子显微镜、衰减全反射-傅里叶变换红外光谱和X射线光电子能谱表征，证实了聚合物在膜表面上的成功涂覆。该涂膜对油水混合物分离的油截留率超过99.0%，对油/水乳状液分离的油截留率超过98.0%。经牛血清白蛋白过滤和水洗后，通量恢复率达到96.7%。涂膜M3对刚果红、甲基橙子、亚甲基蓝、结晶紫、Pb（II）、Cu（II）、Cd（II）的去除率分别为82.4%、83.9%、6.3%、26.8%、90.6%、91.3%、86.2%。因此，它可用于去除废水中的染料和重金属离子。抑菌圈试验和激光共聚焦扫描显微镜分析也证实了涂膜的抗菌活性。此外，交联策略为涂覆的膜提供了优异的耐久性和可重复性。更重要的是，使用水作为溶剂可以确保这些膜涂层的应用通过非常安全和环境友好的涂覆工艺进行。
As reported herein, the waterborne polymers poly(glycidyl methacrylate-co-poly(ethylene glycol) methyl ether methacrylate) P(GMA-co-mPEGMA) and polyethyleneimine (PEI) were used to prepare multipurpose polyvinylidene fluoride (PVDF) membranes via a direct spray-coating method. P(GMA-co-mPEGMA) and PEI were alternately sprayed onto the PVDF membrane to yield stable cross-linked copolymer coatings. The successful coating of polymers onto the membrane surface was verified by scanning electron microscopy, attenuated total reflectance-Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy characterization. The coated membrane exhibited oil rejection rates that exceeded 99.0% for oil water mixture separation and 98.0% for oil/water emulsion separation. The flux recovery ratio reached 96.7% after bovine serum albumin filtration and washing with water. The removal efficiencies of the coated membrane M3 for Congo red, methyl orange, methylene blue, and crystal violet, Pb(II), Cu(II), and Cd(II) were 82.4, 83.9, 6.3, 26.8, 90.6, 91.3, and 86.2%, respectively. Thus, it can be used for the removal of dyes and heavy metal ions from wastewater. The antibacterial activities of the coated membranes were also confirmed by the inhibition zone tests and confocal laser scanning microscopy analysis. In addition, the cross-linking strategy provides the coated membranes with excellent durability and repeatability. More importantly, the use of water as the solvent can ensure that the application of these membrane coatings proceeds via a very safe and environmentally friendly coating process.