Anjum Sadifa, Arik Michael, Patel Arya, Abasali Nyalah, Wu Laying, Sarkar Amrita
Department of Chemistry & Biochemistry, Montclair State University, Montclair, New Jersey 07043, United States.
College of Science and Mathematics, Montclair State University, Montclair, New Jersey 07043, United States.
ACS Appl Polym Mater. 2025 Feb 3;7(3):1187-1193. doi: 10.1021/acsapm.4c03792. eCollection 2025 Feb 14.
An important question remains unresolved, despite extensive studies on polymer-based sorbents for adsorbing poly and perfluoro alkyl substances (PFAS): How does the positioning of the fluorine-rich segment in polymer affect PFAS removal? Herein, we designed a linear, uncharged triblock copolymer incorporating a fluorinated moiety in the polymer backbone, which effectively removed perfluorooctanoic acid (PFOA) from water. In contrast, polymers without fluorogenic moiety or with it in the side chains showed significantly poorer PFOA removal. Our finding suggests that PFOA adsorption is more influenced by C-FF-C interactions when the fluorinated segment is in the polymer backbone, not in the side chain.
尽管对用于吸附多氟和全氟烷基物质（PFAS）的聚合物基吸附剂进行了广泛研究，但一个重要问题仍未得到解决：聚合物中富含氟的链段的位置如何影响PFAS的去除？在此，我们设计了一种线性、不带电荷的三嵌段共聚物，该共聚物在聚合物主链中引入了一个氟化部分，可有效从水中去除全氟辛酸（PFOA）。相比之下，没有氟化部分或氟化部分在侧链中的聚合物对PFOA的去除效果要差得多。我们的研究结果表明，当氟化链段位于聚合物主链而非侧链中时，PFOA的吸附受C-FF-C相互作用的影响更大。
