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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characterization of chloromethylated/quaternized poly(phthalazinone ether sulfone ketone) for positively charged nanofiltration membranes
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Preparation and characterization of chloromethylated/quaternized poly(phthalazinone ether sulfone ketone) for positively charged nanofiltration membranes

机译：带正电纳滤膜的氯甲基化/季铵化聚（酞嗪酮醚砜酮）的制备与表征

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摘要

Chloromethylated poly(phthalazinone ether sulfone ketone) (CMPPESK) as a novel membrane material was successfully prepared from poly(phthalazinone ether sulfone ketone), with concentrated sulfuric acid as the solvent and catalyst, and chloromethyl octyl ether with lower toxicity as the chloromethylated regent. The effects of the reaction conditions on the preparation of CMPPESKs with different degrees of chloromethylation were examined. The quantity of chloromethyl groups per repeated unit (DCM) of CMPPESK was determined by the method of analysis of the chlorine element, and structures were characterized by H-1-NMR spectroscopy. The introduction of chloromethyl groups into the polymer chains led to a decrease in the decomposition temperature. With increasing DCM, the initial degradation temperature declined. CMPPESK had good solubility and was soluble in N-methyl-2-pyrrolidone (NMP), NN-dimethylacetamide (DMAc), and chloroform. However, quaternized poly(phthalazinone ether sulfone ketone) (QAPPESK) had excellent solvent resistance, was only partly soluble in sulfuric acid (98%), and was swollen in N,N-dimethylformamide. QAPPESK nanofiltration (NF) membranes had about 90% rejection for MgCl2, and the performance of the NF membrane prepared with DMAc as the solvent was superior to that of the NF membrane prepared with NMP as the solvent. In addition, the rejection to the different salt solutions followed the following sequence: MgCl2 > MgSO4 > NaCl > Na2SO4. Furthermore, the thermotolerance of the QAPPESK NF membrane was examined, and the results show that when the solution temperature rose from 11 to 90 degrees C, the water flux increased more than threefold with stable salt rejection. (c) 2007 Wiley Periodicals, Inc.
机译：以浓硫酸为溶剂和催化剂，以毒性较低的氯甲基辛基醚为氯甲基化试剂，成功地制备了一种新型的膜材料氯甲基化聚酞菁醚砜酮（CMPPESK）。考察了反应条件对不同氯甲基化程度的CMPPESKs制备的影响。通过分析氯元素的方法确定CMPPESK的每重复单元（DCM）的氯甲基的数量，并通过H-1-NMR光谱表征结构。将氯甲基基团引入聚合物链导致分解温度降低。随着DCM的增加，初始降解温度下降。 CMPPESK具有良好的溶解性，可溶于N-甲基-2-吡咯烷酮（NMP），NN-二甲基乙酰胺（DMAc）和氯仿。但是，季铵化的聚（酞嗪酮醚砜酮）（QAPPESK）具有优异的耐溶剂性，仅部分溶于硫酸（98％），并在N，N-二甲基甲酰胺中溶胀。 QAPPESK纳滤（NF）膜对MgCl2的截留率约为90％，并且以DMAc为溶剂制备的NF膜的性能优于以NMP为溶剂制备的NF膜。此外，不同盐溶液的排阻遵循以下顺序：MgCl2> MgSO4> NaCl> Na2SO4。此外，检查了QAPPESK NF膜的耐热性，结果表明，当溶液温度从11摄氏度升至90摄氏度时，水通量增加了三倍以上，并且具有稳定的脱盐率。 （c）2007年Wiley Periodicals，Inc.

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