Investigating the role of polymer size on ionic conductivity in free-standing hyperbranched polyelectrolyte membranes

Abrahamsson, Tobias; Vagin, Mikhail; Seitanidou, Maria; Roy, Arghyamalya; Phopase, Jaywant; Petsagkourakis, Ioannis; Moro, Nathalie; Tybrandt, Klas; Crispin, Xavier; Berggren, Magnus; Simon, Daniel T.

doi:10.1016/j.polymer.2021.123664

Cited by 10 publications

(21 citation statements)

References 40 publications

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“…In addition, the elongation at break showed a trend of increasing and then decreasing. This is due to the addition of inorganic fillers forming a three‐dimensional network cross‐linked structure inside the polymer structure, which makes the polymer structure denser and enhances the tensile strength of the membranes 43,44 . At the same time, the inorganic filler is the quaternised silane coupling agent, which increases the transport sites of the membrane.…”

Section: Resultsmentioning

confidence: 99%

A novel anion exchange membrane based on silicone/polyphenylene oxide with excellent ionic conductivity for AEMFC

Liu

Wang

Sui

et al. 2022

Polymers for Advanced Techs

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To achieve good stability of anion‐exchange membranes. We report an organic–inorganic composite anion exchange membrane based on polyphenylene oxide (PPO) and 3‐[2‐(2‐aminoethylamino)ethylamino]propyl‐trimethoxysilane to improve dimensional stability and mechanical stability without affecting ionic conductivity. The successful synthesis of the membranes was confirmed by FT‐IR, 1H NMR, and EDX. The SiOSi three‐dimensional network cross‐linked structure was formed inside the anion‐exchange membranes by added inorganic fillers. It suppressed the swelling behavior of the membrane after water uptake, with water uptake rate of 48.2%–55.6% and swelling rate of 3.1%–14.2%. It improved the mechanical strength of the membranes with tensile strength of 33.5–37.8 MPa as the ratio of the membrane structure varied. Meanwhile, the flexible chain segments in the polymer structure contributed to the formation of microscopic phase separation structures, and the constructed ion‐conducting channels enabled QPPO‐Si‐5 to reach the highest hydroxide ion conductivity of 78.7 mS/cm at 80°C (ion exchange capacity [IEC] value of 1.2 mmol/g). QPPO‐Si‐1 exhibited better long‐term chemical stability, retaining 48.3% of the initial conductivity (30.8 mS/cm) after 600 h of alkali stability testing at 80°C in 1 M KOH solution. In conclusion, the results of this study provide a facile synthetic strategy with improved membrane's comprehensive performance.

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Section: Resultsmentioning

confidence: 99%

A novel anion exchange membrane based on silicone/polyphenylene oxide with excellent ionic conductivity for AEMFC

Liu

Wang

Sui

et al. 2022

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…[35] Furthermore, OEIPs have been repeatedly demonstrated to exhibit very high transport efficiency (ratio of intended drug delivered to electrical driving current, with 100% defined as 1 drug molecule per measured electronic charge) due to the high charge selectivity and effective pore size of the ion transport materials. [10,13,36,37] By integrating OEIPs into fibers, [38][39][40] new opportunities open up for implantable devices, as the form factor is more flexible, more easily miniaturized, and can incorporate additional elements (e.g., optical lumina in a multilumen fiber). In this work, semi-flexible (Figure 1c) and brittle uncoated silica capillaries were used due to the ease of processing and availability.…”

Section: Resultsmentioning

confidence: 99%

“…The selectivity towards cations or anions for an ion conductive material is dependent on the concentration of fixed charges in the conductor versus the surrounding electrolyte concentration [ 43 ] and the specific ion conductive materials used for OEIPs are chosen (or designed) with optimal selectivity in mind. [ 12,37 ] At low electrolyte concentration the fixed charges in the material can, to a high degree, repel similarly‐charged ions (co‐ions). The mobile ions in the material are thus primarily oppositely charged ions (counter‐ions), resulting in selective ion transport.…”

Section: Resultsmentioning

confidence: 99%

Autonomous Microcapillary Drug Delivery System Self‐Powered by a Flexible Energy Harvester

Gabrielsson

Jung

Han

et al. 2021

Adv Materials Technologies

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Implantable bioelectronic devices pave the way for novel biomedical applications operating at high spatiotemporal resolution, which is crucial for neural recording and stimulation, drug delivery, and brain–machine interfaces. Before successful long‐term implantation and clinical applications, these devices face a number of challenges, such as mechanical and operational stability, biocompatibility, miniaturization, and powering. To address two of these crucial challenges—miniaturization and powering—the development and characterization of an electrophoretic drug delivery device, manufactured inside fused quartz fibers (outer diameter of 125 µm), which is self‐powered by a flexible piezoelectric energy harvester, are reported. The resulting device—the first integration of piezoelectric charging with “iontronic” delivery—exhibits a high delivery efficiency (number of neurotransmitters delivered per charges applied) and a direct correlation between the piezoelectric charging and the amount delivered (number of dynamic bends versus pmols delivered).

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“…However, one advantage is that ionic conductors can be used to transport specific charged ions such as drugs. Such an ionically conductive filler in the form of an ion selective polyelectrolyte 49 was employed in publication IV.…”

Section: Strain Accommodating Patternsmentioning

confidence: 99%

Materials and Devices for Stretchable Electronic Nerve Interfaces

Lienemann

2022

Linköping Studies in Science and Technology. Dissertations

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This thesis would not have been possible without the many people who supported me throughout my PhD. Here I wish to express my gratitude:My upmost gratitude goes of course to Klas. When I met you in Zürich I was told you are a brilliant and critical scientist. Now I know you are also a wonderful supervisor. Thanks for caring about me as a person as well as about my PhD. I have extreme respect for you as a supervisor and scientist. I cannot put into big enough words how thankful I am for the tremendous amount of support and knowledge I got from you! I will miss our midnight emails about science. It was an honor to be your first PhD student.Magnus, and the rest of LOE management I would like to thank for making LOE a huge group that still acts like a small one.Besides Klas, I also had several additional (unofficial) mentors that contributed greatly to the success of my PhD.Nadia, my mentor in life. Thanks for ever pushing me to achieve my potential. My motivation for this thesis stemmed to a great deal from wanting to make you and Klas proud. Thanks for believing in me. And thanks for always being there for me. Even commenting on many drafts of this thesis.Marie, my mentor at LOE. Thanks for teaching me the first things I needed to know as a new PhD student, always challenging me to work harder while at the same time luring me with frisbee and beers. Also, thanks for commenting on this thesis and for providing the first instance of the beautiful nerve figure that I have been using ever since in various new versions (also all over in this thesis).Mary, my mentor in the Lab. Thanks for your positive attitude and endless energy to get things done. It was wonderful to work with you on the PigSel project and your comments on this thesis were well appreciated.Aline, my long-distance mentor in Zürich. Thanks for 3 years of bi-weekly support-group meetings of 'people suffering from Klas' gold nanowire fabrication'. You explained and solved a great deal of my problems before they ever could become any up here in the north.To Simon and Johan, my surgeon mentors at Linköping university hospital, my sincerest thanks for happily implanting all the in vivo devices of this thesis over the last 3 years and teaching me firsthand biology.x Riki and Yianni, thanks for being there with me right from the start. You were the reason the SoftEs were not just about electronics, and that my PhD was not just about becoming a doctor, but also about The Doctor. Yianni especially, thanks for being my partner in crime inside and outside the lab. Thanks for caring for the happiness of people with your endless chaotic energy that powered friday beers, movie productions and gifts alike.A big thanks also to the other SoftEs. Thanks for making our group feel like a small family. Nara, thanks for your kind spirit and comments on this thesis. Mohsen, thanks for commenting on the mechanical part of this thesis and taking over all the lab duties from me. Aiman, thanks for being the good soul of the Rubberlab by always being there to talk about science an...

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Investigating the role of polymer size on ionic conductivity in free-standing hyperbranched polyelectrolyte membranes

Cited by 10 publications

References 40 publications

A novel anion exchange membrane based on silicone/polyphenylene oxide with excellent ionic conductivity for AEMFC

A novel anion exchange membrane based on silicone/polyphenylene oxide with excellent ionic conductivity for AEMFC

Autonomous Microcapillary Drug Delivery System Self‐Powered by a Flexible Energy Harvester

Materials and Devices for Stretchable Electronic Nerve Interfaces

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