Preparation and pervaporation characteristics of novel ethanol permselective polyelectrolyte–surfactant complex membranes

Zhang, Ping; Zheng, Pei-Yao; Zhao, Faqiong; An, Quan‐Fu; Gao, Congjie

doi:10.1039/c5ra09308b

Cited by 13 publications

(13 citation statements)

References 50 publications

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“…PESCs made from N -isopropylacrylamide (PA- co -NIPAM (18:82)), which have a large hydrophobic portion, can associate cooperatively with oppositely charged surfactant ions and form soluble complexes beyond the stoichiometric charge match point [68]. This has been seen for a number of systems [18,51,68,82,86,112,120,121] and through simulations [72]. Overall, the presence of blocks results in various PESC structures depending on the hydrophilicity or hydrophobicity of the block.…”

Section: Interactions Of Polyelectrolytes and Surfactants In The Bmentioning

confidence: 99%

“…Surfactants are used in detergents [1,2], emulsions [3,4], waste-water treatment [5], and more and their performance can be bolstered with the addition of polymers to the formulation. While surfactants and their micelles can change the surface tension, phase behavior and rheology of a solution [3,6,7], the addition of polymers, particularly charged polymers (polyelectrolytes), has been shown to enhance bulk and interfacial properties for a variety of applications [8,9,10,11,12,13,14], including cosmetics [15], perfumes [16,17], biofuel extraction [18] and oil recovery [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Intermolecular Interactions in Polyelectrolyte and Surfactant Complexes in Solution

2018

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Polyelectrolytes are an important class of polymeric materials and are increasingly used in complex industrial formulations. A core use of these materials is in mixtures with surfactants, where a combination of hydrophobic and electrostatic interactions drives unique solution behavior and structure formation. In this review, we apply a molecular level perspective to the broad literature on polyelectrolyte-surfactant complexes, discussing explicitly the hydrophobic and electrostatic interaction contributions to polyelectrolyte surfactant complexes (PESCs), as well as the interplay between the two molecular interaction types. These interactions are sensitive to a variety of solution conditions, such as pH, ionic strength, mixing procedure, charge density, etc. and these parameters can readily be used to control the concentration at which structures form as well as the type of structure in the bulk solution.

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Section: Interactions Of Polyelectrolytes and Surfactants In The Bmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Intermolecular Interactions in Polyelectrolyte and Surfactant Complexes in Solution

2018

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“…17 Moreover, advances in drug delivery systems and polymer science have led to the development of another type of complexes known as polymersurfactant complexes. In fact, polyelectrolyte-surfactant complexes (PESCs) find application not only in pharmaceutical formulations 18 but also in detergency, 19 cosmetics, 20 wastewater purification, [21][22][23] rheological control 24,25 and in surface adsorption, biofuel extraction and oil recovery 26 and surface adsorption. 27 It was evidenced that surfactants performance could be bolstered with polymers addition.…”

Section: Introductionmentioning

confidence: 99%

Polymethylmethacrylate derivatives Eudragit E100 and L100: Interactions and complexation with surfactants

Ofridam

Lebaz

Gagnière

et al. 2020

Polymers for Advanced Techs

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Precipitation or coprecipitation of polyelectrolytes has been largely investigated. However, the precipitation of polyelectrolytes via addition of charged and non‐charged surfactants has not been systematically studied and reported. Consequently, the aim of this work is to investigate the effect of different surfactants (anionic, cationic, non‐charged and zwitterionic) on the precipitation of cationic and anionic polymethylmethacrylate polymers (Eudragit). The surfactants effect has been investigated as a function of their concentration. Special attention has been dedicated to the CMC range and to the colloidal characterization of the formed dispersions. Moreover, the effect of salt (NaCl) and pH was also addressed. It is pointed out that non‐ionic and zwitterionic surfactants do not interact with charged Eudragit E100 and L100. For oppositely charged Eudragit E100/SDS and Eudragit L100/CTAB, precipitation occurs, and the obtained dispersions have been characterized in terms of particle size distribution and zeta potential. It was established that the binding of SDS molecules to Eudragit E100 polymer chains is made through the negative charges of the surfactant heads under the CMC value whereas binding of CTAB to Eudragit L100 chains is made at a CTAB concentration 5 times above its CMC. For Eudragit E100/SDS system, a more acidic medium induces aggregation. A same result was observed for the Eudragit L100/CTAB at a more basic pH. Moreover, it was observed that increasing salt concentration (higher than 100 mM) led to aggregation as generally observed for polycations/anionic surfactant systems.

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“…Separation of bioethanol by membrane process has been studied to replace conventional distillation since, for dilute ethanol streams (less than 5 wt%), there are high energy requirements . Among these techniques, pervaporation (PV) has been studied by many researchers . The driving force in PV for the mass transfer of permeate is the chemical potential gradient between the feed side and the permeate side of the membrane .…”

Section: Introductionmentioning

confidence: 99%

“…8 Among these techniques, pervaporation (PV) has been studied by many researchers. [9][10][11][12] The driving force in PV for the mass transfer of permeate is the chemical potential gradient between the feed side and the permeate side of the membrane. 13 Besides reducing the inhibition of ethanol in the production stage due to the possibility of its simultaneous use with fermentation, PV could replace a concentration step that is required for recovery because of the presence of ethanol in small quantities in the broth.…”

mentioning

confidence: 99%

Effects of by‐products of fermentation of banana pseudostem on ethanol separation by pervaporation

Linzmeyer

Ramlow

Souza

et al. 2019

Biotechnology Progress

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In this work, we performed recovery of ethanol from a fermentation broth of banana pseudostem by pervaporation (PV) as a lower‐energy‐cost alternative to traditional separation processes such as distillation. As real fermentation systems generally contain by‐products, it was investigated the effects of different components from the fermentation broth of banana pseudostem on PV performance for ethanol recovery through commercial flat sheet polydimethylsiloxane (PDMS) membrane. The experiments were compared to a binary solution (ethanol/water) to determine differences in the results due to the presence of fermentation by‐products. A real fermented broth of banana pseudostem was also used as feed for the PV experiments. Seven by‐products from fermented broth were identified: propanol, isobutanol, methanol, isoamyl alcohol, 1‐pentanol, acetic acid, and succinic acid. Moreover, the residual sugar content of 3.02 g/L1 was obtained. The presence of methanol showed the best results for total permeate flux (0.1626 kg·m−2·h−1) and ethanol permeate flux (0.0391 kg·m−2·h−1) during PV at 25°C and 3 wt% ethanol, also demonstrated by the selectivity and enrichment factor. The lowest total fluxes of permeate were observed in the experiments containing the acids. Better permeance of 0.1171 from 0.0796 kg·m−2·h−1 and membrane selectivity of 9.77 from 9.30 were obtained with real fermentation broth than with synthetic solutions, possibly due to the presence of by‐products in the multicomponent mixtures, which contributed to ethanol permeation. The results of this work indicate that by‐products influence pervaporation of ethanol with hydrophobic flat sheet membrane produced from the fermented broth of banana pseudostem.

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Preparation and pervaporation characteristics of novel ethanol permselective polyelectrolyte–surfactant complex membranes

Cited by 13 publications

References 50 publications

Intermolecular Interactions in Polyelectrolyte and Surfactant Complexes in Solution

Intermolecular Interactions in Polyelectrolyte and Surfactant Complexes in Solution

Polymethylmethacrylate derivatives Eudragit E100 and L100: Interactions and complexation with surfactants

Effects of by‐products of fermentation of banana pseudostem on ethanol separation by pervaporation

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