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Experimental study of physicochemical changes in water by iterative contact with hydrophilic polymers: A comparison between Cellulose and Nafion
Journal of Molecular Liquids ( IF 6 ) Pub Date : 2018-07-17 , DOI: 10.1016/j.molliq.2018.07.045
Vittorio Elia , Rosario Oliva , Elena Napoli , Roberto Germano , Gabriella Pinto , Liliana Lista , Marcella Niccoli , Dario Toso , Giuseppe Vitiello , Marco Trifuoggi , Antonella Giarra , Tamar A. Yinnon

Water kept in contact with cellulose has not been a “juicy” research topic until now. This is surprising because cellulose is a major component of the cell walls in green plants. It is also a common material used in many artificial systems, e.g., filters. In this work, we review some of our experimental results and show that iteratively bringing cellulose (cotton wool) in contact with pure water endows the water with some unforeseen properties. For example, the liquid left over after removing the cellulose is optically active, i.e., mirror symmetry breaking was triggered during temporary contact of bulk water with a natural polymer. (Here and in the following, by “mirror” symmetry we actually mean “chiral” symmetry). Moreover, this leftover liquid fluoresces after irradiation with ultraviolet light. These properties are neither attributable to impurities released by the inert polymer nor to organic- or bio-contaminants, as our state-of-the-art analytical techniques show. These techniques include gel electrophoresis, Matrix-Assisted Laser Desorption/Ionization Time of Flight (MALDI-TOF) and Gas Chromatography both coupled with Mass Spectrometry. Instead, the properties are attributable to stabilization of interfacial water adjacent to hydrophilic membranes. Our findings have implications for processes in water flowing adjacent to cellulose, in particular enantioselective processes. Such processes play critical roles in many bio-systems and technologies. Thus, our study indicates that water iteratively brought in contact with cellulose merits intensive research.



中文翻译:

亲水性聚合物迭代接触引起的水中理化变化的实验研究:纤维素与Nafion的比较

到目前为止,与纤维素保持接触的水还不是一个“多汁”的研究课题。这是令人惊讶的,因为纤维素是绿色植物细胞壁的主要成分。它也是许多人工系统(例如过滤器)中使用的常见材料。在这项工作中,我们回顾了一些实验结果,结果表明,反复地使纤维素(棉绒)与纯水接触会使水具有某些无法预料的特性。例如,除去纤维素后残留的液体具有光学活性,即在散装水与天然聚合物的暂时接触过程中触发了镜面对称性破坏。(在下文中,通过“镜像”对称性,我们实际上是指“手性”对称性)。另外,该残留液体在紫外线照射后发荧光。正如我们最新的分析技术所示,这些特性既不能归因于惰性聚合物释放的杂质,也不能归因于有机污染物或生物污染物。这些技术包括凝胶电泳,基质辅助激光解吸/电离飞行时间(MALDI-TOF)和气相色谱,均结合质谱。相反,这些性质归因于与亲水膜相邻的界面水的稳定化。我们的发现对与纤维素相邻的水流过程,特别是对映选择性过程有影响。这样的过程在许多生物系统和技术中都起着至关重要的作用。因此,我们的研究表明水与纤维素反复接触值得深入研究。如我们最先进的分析技术所示。这些技术包括凝胶电泳,基质辅助激光解吸/电离飞行时间(MALDI-TOF)和气相色谱,均结合质谱。相反,这些性质归因于与亲水膜相邻的界面水的稳定化。我们的发现对与纤维素相邻的水流过程,特别是对映选择性过程有影响。这样的过程在许多生物系统和技术中都起着至关重要的作用。因此,我们的研究表明水与纤维素反复接触值得深入研究。如我们最先进的分析技术所示。这些技术包括凝胶电泳,基质辅助激光解吸/电离飞行时间(MALDI-TOF)和气相色谱,均结合质谱。相反,这些性质归因于与亲水膜相邻的界面水的稳定化。我们的发现对与纤维素相邻的水流过程,特别是对映选择性过程有影响。这样的过程在许多生物系统和技术中都起着至关重要的作用。因此,我们的研究表明水与纤维素反复接触值得深入研究。基质辅助的激光解吸/电离飞行时间(MALDI-TOF)和气相色谱仪均与质谱联用。相反,这些性质归因于与亲水膜相邻的界面水的稳定化。我们的发现对与纤维素相邻的水流过程,特别是对映选择性过程有影响。这样的过程在许多生物系统和技术中都起着至关重要的作用。因此,我们的研究表明水与纤维素反复接触值得深入研究。基质辅助的激光解吸/电离飞行时间(MALDI-TOF)和气相色谱仪均与质谱联用。相反,这些性质归因于与亲水膜相邻的界面水的稳定化。我们的发现对与纤维素相邻的水流过程,特别是对映选择性过程有影响。这样的过程在许多生物系统和技术中都起着至关重要的作用。因此,我们的研究表明水与纤维素反复接触值得深入研究。这样的过程在许多生物系统和技术中都起着至关重要的作用。因此,我们的研究表明水与纤维素反复接触值得深入研究。这样的过程在许多生物系统和技术中都起着至关重要的作用。因此,我们的研究表明水与纤维素反复接触值得深入研究。

更新日期:2018-07-17
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