a.Ministry of Education Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
b.Materials Science Division of Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
c.Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
d.Beijing Key Laboratory for Green Catalysis and Separation, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
Quan-Fu An, E-mail anqf@zju.edu.cn
收稿:2017-05-02,
修回:2017-7-3,
录用:2017-7-3,
网络首发:2017-09-22,
纸质出版:2018-01-05
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Pei-Yao Zheng, Xian-Wu Zhang, Zhi-Wei Sun, 等. Nanostructured Polyelectrolyte-surfactant Complex Pervaporation Membranes for Ethanol Recovery: the Relationship between the Membrane Structure and Separation Performance[J]. Chinese Journal of Polymer Science, 2018,36(1):25-33.
Pei-Yao Zheng, Xian-Wu Zhang, Zhi-Wei Sun, et al. Nanostructured Polyelectrolyte-surfactant Complex Pervaporation Membranes for Ethanol Recovery: the Relationship between the Membrane Structure and Separation Performance[J]. Chinese Journal of Polymer Science, 2018, 36(1): 25-33.
Pei-Yao Zheng, Xian-Wu Zhang, Zhi-Wei Sun, 等. Nanostructured Polyelectrolyte-surfactant Complex Pervaporation Membranes for Ethanol Recovery: the Relationship between the Membrane Structure and Separation Performance[J]. Chinese Journal of Polymer Science, 2018,36(1):25-33. DOI: 10.1007/s10118-018-2006-1.
Pei-Yao Zheng, Xian-Wu Zhang, Zhi-Wei Sun, et al. Nanostructured Polyelectrolyte-surfactant Complex Pervaporation Membranes for Ethanol Recovery: the Relationship between the Membrane Structure and Separation Performance[J]. Chinese Journal of Polymer Science, 2018, 36(1): 25-33. DOI: 10.1007/s10118-018-2006-1.
Polyelectrolyte-surfactant complexes (PESCs) were fabricated through the interaction of poly(acrylic acid) and four different cationic surfactants or their mixtures. PESC membranes were prepared by solution casting method and were applied in ethanol recovery from aqueous solution
via
pervaporation. Elemental analysis (EA)
Fourier transform infrared spectroscopy (FTIR)
water contact angle (CA) measurement
differential scanning calorimetry (DSC) and X-ray scattering were employed to characterize the composition
structure and properties of PESCs. The results reveal that the investigated PESCs are similar in hydrophobicity but different in hierarchical nanostructures. In separating 5 wt% ethanol/water mixture
PESC membranes with high crystallinity will have both low flux and ethanol selectivity because of the high packing density and low permeability of crystalline regions. Meanwhile
the hierarchical nanostructures of PESC membranes change under pervaporation environment as was revealed by
in situ
synchrotron radiation X-ray scattering measurement. That is
the crystalline region could melt at high temperature in swelling state
thus consequently enhancing the ethanol selectivity.
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