Comparative Study on Pervaporation Performance of Polyphosphazene Membranes with Different Fluorine Side Groups for Thiophene/<i>n</i>-Heptane Separation.

As illustrated in Figure 11 d–f, an increase in feed concentration leads to an essentially stable or increasing trend in thiophene and n -heptane permeability, while selectivity exhibits a decreasing trend, aligning with the sulfur enrichment factor trend. 3.2.3.

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