Carbonization of Carboxylate‐Functionalized Polymers of Intrinsic Microporosity for Water Treatment,Macromolecular Chemistry and Physics

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Carbonization of Carboxylate‐Functionalized Polymers of Intrinsic Microporosity for Water Treatment
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-02-07 , DOI: 10.1002/macp.201900532
Jun Woo Jeon _{1,

2} , Hee Joong Kim ₂ , Kyung Hwa Jung ₂ , Jinyoung Lee ₁ , Yong Seok Kim _{1,

3} , Byoung Gak Kim _{1,

3} , Jong‐Chan Lee ₂

Affiliation

Considering the variations in their pore characteristics and heterogeneity, the carbonization process of carboxylate‐functionalized polymers of intrinsic microporosity (PIM‐COOH) is investigated and the resulted membranes are tested for water treatment. The four distinct types of sub‐nanosized membranes with different oxygen‐to‐carbon ratios are prepared at four different temperatures: the pristine polymer membrane, crosslinked membrane via thermal decarboxylation, amorphous carbon membrane, and graphitic carbon membrane. Notably, the sub‐1 nm micropores of all the heat‐treated samples that do not exhibit a broadening pore size distribution are still retained. Nanofiltration performance is investigated using an aqueous MgSO₄ solution (2000 ppm), pure water, and a series of the defect‐free, sub‐1 nm microporous membranes. While retaining the salt rejection, the water flux of the membranes increases with the pyrolysis temperature owing to their low friction property.

中文翻译：

固有微孔性的羧酸盐官能化聚合物的碳化

考虑到其孔隙特性和不均一性的变化，研究了具有固有微孔性（PIM-COOH）的羧酸官能化聚合物的碳化过程，并对所得膜进行了水处理测试。在四个不同的温度下制备具有不同氧碳比的四种不同类型的亚纳米膜：原始聚合物膜，通过热脱羧交联的膜，无定形碳膜和石墨碳膜。值得注意的是，所有热处理过的样品的亚1纳米以下的微孔都没有出现扩大的孔径分布，仍然保留了下来。使用MgSO ₄水溶液研究纳滤性能溶液（2000 ppm），纯水和一系列无缺陷的亚1纳米以下微孔膜。在保持脱盐性的同时，由于其低摩擦性能，膜的水通量随热解温度而增加。

更新日期：2020-02-07

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