Stimuli responsive conductive polyaniline membrane: In-filtration electrical tuneability of flux and MWCO

Xu, Lili; Shahid, Salman; Hołda, Agnieszka K.; Emanuelsson, Emma Anna Carolina; Patterson, Darrell Alec

doi:10.1016/j.memsci.2018.01.070

Cited by 51 publications

(35 citation statements)

References 64 publications

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“…The tensile strength and elongation at break of the S‐PANI membrane were 3.4 ± 0.3 MPa and 5.6 ± 1.3%, respectively. S‐PANI membranes' tensile strength is almost 92% of the PANI counterparts reported elsewhere 62 …”

Section: Resultsmentioning

confidence: 60%

“…The decrease in the contact angles of water for doped S‐PANI suggests that the wetting of the water on a doped S‐PANI surface is better for low pH than for high pH‐soaked S‐PANI. This may be indicative of a stronger intermolecular attraction between water and doped S‐PANI at lower pH values and less interaction at a higher pH value 62,95 . This also suggests that S‐PANI membranes doped at lower pH could form a hydration layer at their surface, which prevents foulants from adsorbing on the surface 96 …”

Section: Resultsmentioning

confidence: 99%

“…Figure 1 shows the chemical structure of the formed S‐PANI with sulfonate functional group binding with the aromatic benzene ring. PANI was synthesized by an established method 62 …”

Section: Methodsmentioning

confidence: 99%

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Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Alhweij

Amura

Wenk

et al. 2021

J of Applied Polymer Sci

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Membranes heavily rely on chlorination to diminish (bio)fouling, but chlorination can also lead to membrane degradation. We developed sulfonated polyaniline (S‐PANI) ultrafiltration (UF) membranes with improved chlorine resistance and intrinsic antifouling properties. The S‐PANI membranes were synthesized through Non‐solvent Induced Phase Separation (NIPS). Membrane performance was evaluated under harsh chlorine conditions (250 ppm sodium hypochlorite for 3 days under different pH conditions). The S‐PANI membranes showed improved chlorine resistance including a stable performance without changes in model foulant BSA rejection. In contrast, PANI membranes suffered critical structural damage with complete leakage and commercial PES membranes showed a 76% increase in pure water flux and a noticeable change in BSA rejection. Small changes in S‐PANI membrane performance could be linked to membrane structural changes with pH, as confirmed by SEM, IR spectroscopy, and contact angle measurements. Additionally, the S‐PANI membranes showed better antifouling properties with a high flux recovery ratio in comparison to PANI membranes using alginic acid, humic acid, and BSA model foulants. Chemical cleaning by sodium hypochlorite re‐instated the transport properties to its initial condition. Overall, the developed S‐PANI membranes have a high chlorine tolerance and enhanced antifouling properties making them promising for a range of UF membrane applications.

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Section: Resultsmentioning

confidence: 60%

Section: Resultsmentioning

confidence: 99%

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Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Alhweij

Amura

Wenk

et al. 2021

J of Applied Polymer Sci

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“…More commonly investigated are membrane filtration setups with conducting polymers. Polypyrrole and polyaniline for example were used on different membrane filter substrates exploiting polymer volume changes resulting from Red/Ox processes to electrochemically vary the cut off size [86][87][88] .…”

Section: Separation Applicationsmentioning

confidence: 99%

Investigating volume change and ion transport in conjugated polymers

Gladisch

2021

Linköping Studies in Science and Technology. Dissertations

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The e-plants team for being such a good team.The colleagues at LOE and RISE for helping with good ideas and solutions for all the small and big issues in the lab and providing a nice work environment.The lab crew for relentlessly fixing what we broke throughout our science endeavors.All the other administrative team members for keeping everything running.The numerous collaborators, internally and all over the world for fruitful collaborations. Vasilis for the great fun in our joint project. Sarbani for making the invisible visible. Najmeh for good collaboration.My friends in Norrköping and all over the world for all the activities to have a good work life balance. My friends and family in Germany.Mina for making every day a great day and all her support.

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“…Hence, many researches have now focused on taking advantages of functional polymers in an attempt to improve properties of materials for use in a wide range of applications such biosensor, drug delivery systems, purification, or separation systems . Some of these polymers can also respond to external stimuli such as temperature, pH, light, electrostatic, and electrical . PNIPAAm, the most well‐known thermo‐responsive polymer, can respond to temperature changes when heated to the temperature crossing its lower critical solution temperature (LCST of PNIPAAm = 32°C) .…”

Section: Introductionmentioning

confidence: 99%

Water dispersible magnetite nanocluster coated with thermo‐responsive thiolactone‐containing copolymer

Paenkaew

Kajornprai

Rutnakornpituk

2020

Polymers for Advanced Techs

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This work focused on surface modification of magnetite nanoparticle (MNP) with poly(poly(ethylene glycol) monomethyl ether methacylate)-b-(poly(N-isopropylacrylamide)-st-poly(thiolactone acrylamide)), PPEGMA-b-(PNIPAAm-st-PTlaAm), diblock copolymer, synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization to obtain the particles having good water dispersible PPEGMA brushes, thermo-responsive PNIPAAm, and reactive thiolactone groups of PTlaAm.The thiolactone moiety in the copolymer can readily react with amino groups grafted on MNP surface and essentially induced the formation of MNP nanocluster.According to transmission electron microscopy (TEM), the size of the nanocluster ranged between 200 and 500 nm per cluster with 8 to 10 nm in diameter for each particle. Hydrodynamic diameter of the nanocluster significantly decreased as the dispersion temperature increased from 25 C to 45 C due to the shrinkage of thermo-responsive PNIPAAm when crossing its lower critical solution temperature (LCST). This stable nanocluster might be potentially used as a magnetic carrier for control release of entrapped entities with a thermally triggering mechanism. K E Y W O R D S magnetite, nanocluster, thermo-responsive, thiolactone, water dispersible

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Stimuli responsive conductive polyaniline membrane: In-filtration electrical tuneability of flux and MWCO

Cited by 51 publications

References 64 publications

Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Self‐doped sulfonated polyaniline ultrafiltration membranes with enhanced chlorine resistance and antifouling properties

Investigating volume change and ion transport in conjugated polymers

Water dispersible magnetite nanocluster coated with thermo‐responsive thiolactone‐containing copolymer

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