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Fabrication of a Bi2O3 Surface-Modified Polyvinylidene Fluoride Membrane via an Ultraviolet Photografting Method: Improving Hydrophilicity and Degree of Acrylic Acid Grafting
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-26 , DOI: 10.1021/acs.iecr.9b06206 Hui Zou 1 , Xiancheng Ren 1 , Jing Zhang 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-26 , DOI: 10.1021/acs.iecr.9b06206 Hui Zou 1 , Xiancheng Ren 1 , Jing Zhang 2
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In this study, a superior hydrophilic polyvinylidene fluoride (PVDF) membrane with an enhanced monomer grafting ratio was prepared via an ultraviolet (UV) photografting polymerization method. The water contact angle (WCA) of the Bi2O3–acrylic acid (AA)-modified PVDF membrane reduces to 40.4° with the increasing of Bi2O3 content, illustrating significant enhancement of membrane hydrophilicity. Attenuated total reflection Fourier transform infrared spectra and atomic absorption spectroscopy reveal that Bi2O3–AA-modified membranes have more than five times AA grafting degree onto the surface of the hydrophobic PVDF membranes than only the AA-modified membrane. The mechanism of Bi2O3 promoting degree of AA grafting during the polymerization process is also especially explored in this research, and h+ and •O2– are proved to be primary active species in graft polymerization. Unexpectedly, the modified membrane has much better retention performance compared with the neat membrane. In addition, the Bi2O3–AA modified membrane also shows self-cleaning property for degradation dyes on the membrane surface.
中文翻译：
紫外光接枝法制备Bi 2 O 3表面改性的聚偏氟乙烯膜：提高亲水性和丙烯酸接枝度
在这项研究中，通过紫外（UV）光接枝聚合方法制备了具有更高单体接枝率的优异亲水性聚偏二氟乙烯（PVDF）膜。的Bi的水接触角（WCA）2 ö 3 -丙烯酸（AA）改性PVDF膜降低到40.4°的Bi的增加2 Ó 3含量，示出了膜的亲水性的显著增强。衰减的全反射傅立叶变换红外光谱和原子吸收光谱表明，Bi 2 O 3 -AA改性膜在疏水性PVDF膜表面的接枝度是仅AA改性膜的五倍以上。Bi的机理2 Ó 3在聚合过程期间促进AA接枝度也尤其是在这个研究探讨，和h +和• ö 2 -被证明是在接枝聚合伯活性物质。出乎意料的是，与纯膜相比，改性膜具有更好的保留性能。此外，Bi 2 O 3 -AA改性膜还对膜表面上的降解染料表现出自清洁性能。
更新日期：2020-03-27
中文翻译：
紫外光接枝法制备Bi 2 O 3表面改性的聚偏氟乙烯膜：提高亲水性和丙烯酸接枝度
在这项研究中，通过紫外（UV）光接枝聚合方法制备了具有更高单体接枝率的优异亲水性聚偏二氟乙烯（PVDF）膜。的Bi的水接触角（WCA）2 ö 3 -丙烯酸（AA）改性PVDF膜降低到40.4°的Bi的增加2 Ó 3含量，示出了膜的亲水性的显著增强。衰减的全反射傅立叶变换红外光谱和原子吸收光谱表明，Bi 2 O 3 -AA改性膜在疏水性PVDF膜表面的接枝度是仅AA改性膜的五倍以上。Bi的机理2 Ó 3在聚合过程期间促进AA接枝度也尤其是在这个研究探讨，和h +和• ö 2 -被证明是在接枝聚合伯活性物质。出乎意料的是，与纯膜相比，改性膜具有更好的保留性能。此外，Bi 2 O 3 -AA改性膜还对膜表面上的降解染料表现出自清洁性能。
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