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Conduction mechanism in polymeric membranes based on PEO or PVdF-HFP and containing a piperidinium ionic liquid

Elamin, Khalid; Shojaatalhosseini, Mansoureh; Danyliv, Olesia; Martinelli, Anna; Swenson, Jan

Customer publications

Conduction mechanism in polymeric membranes based on PEO or PVdF-HFP and containing a piperidinium ionic liquid

Elamin, Khalid; Shojaatalhosseini, Mansoureh; Danyliv, Olesia; Martinelli, Anna; Swenson, Jan

Two types of polymer electrolyte membranes were prepared using poly(ethylene oxide) (PEO) and poly(vinylidene difluoride-co-hexafluoropropylene) (PVdF-HFP), with different amounts of the ionic liquid N-methyl-N-propylpiperidinium bis(trifluoromethane-sulfonyl)imide () added. The results from differential scanning calorimetry and conductivity measurements show that in the case of…
Structure evolution during order–disorder transitions in aliphatic polycarbonate based polyurethanes. Self-healing polymer

Matějka, Libor; Špírková, Milena; Dybal, Jiří; Kredatusová, Jana; Hodan, Jiří; Zhigunov, Alexander; Šlouf, Miroslav

Customer publications

Structure evolution during order–disorder transitions in aliphatic polycarbonate based polyurethanes. Self-healing polymer

Matějka, Libor; Špírková, Milena; Dybal, Jiří; Kredatusová, Jana; Hodan, Jiří; Zhigunov, Alexander; Šlouf, Miroslav

The aliphatic polycarbonate based polyurethanes (PU) from poly(hexamethylene) carbonate diol (PC), hexamethylenediisocyanate and hexanediol were synthesized, characterized and designed as promising self healing polymers. The symmetrical linear PU structure containing the hexamethylene sequences results in a high degree of ordering and strong superstructures, manifested by a high crystallinity of…
How Fluorescent Tags Modify Oligomer Size Distributions of the Alzheimer Peptide

Wägele, Jana; De Sio, Silvia; Voigt, Bruno; Balbach, Jochen; Ott, Maria

Customer publications

How Fluorescent Tags Modify Oligomer Size Distributions of the Alzheimer Peptide

Wägele, Jana; De Sio, Silvia; Voigt, Bruno; Balbach, Jochen; Ott, Maria

Within the complex aggregation process of amyloidogenic peptides into fibrils, early stages of aggregation play a central role and reveal fundamental properties of the underlying mechanism of aggregation. In particular, low-molecular-weight aggregates of the Alzheimer amyloid-β peptide (Aβ) have attracted increasing interest because of their role in cytotoxicity and neuronal…
Strong synergistic improvement of mechanical properties in HDPE/COC blends with fibrillar morphology

Ostafinska, Aleksandra; Vackova, Tatana; Slouf, Miroslav

(Natural) polymersApplicationCharacterizationCrystalline fractionCustomer publicationsFibersMaterialPolymer researchSAXSTechniqueWAXS

Strong synergistic improvement of mechanical properties in HDPE/COC blends with fibrillar morphology

Ostafinska, Aleksandra; Vackova, Tatana; Slouf, Miroslav

High-density polyethylene/cycloolefin copolymer (HDPE/COC) blends with fibrous morphology were prepared. Mechanical properties in the whole concentration range were measured in both macroscale (tensile measurements) and microscale (microindentation hardness testing). Strong improvement of mechanical performance was observed namely for the blends with soft HDPE matrix reinforced with the stiff…
Tuning the interphase adhesion in high-density polyethylene–silica nanocomposites with ionic liquids

Donato, Katarzyna Z.; Donato, Ricardo K.; Zhigunov, Alexander; Mauler, Raquel S.; Schrekker, Henri S.

Customer publications

Tuning the interphase adhesion in high-density polyethylene–silica nanocomposites with ionic liquids

Donato, Katarzyna Z.; Donato, Ricardo K.; Zhigunov, Alexander; Mauler, Raquel S.; Schrekker, Henri S.

This work addresses the use of ionic liquids (ILs) as multifunctional additives in the formation of high-density polyethylene (HDPE)/sol–gel silica nanocomposites via the melt-mixing process. Different approaches for nanocomposite formation were studied and compared, including (1) silica modification with ILs during the sol–gel process and further addition into the polymer…
Tuning poly(arylene piperidinium) anion-exchange membranes by copolymerization, partial quaternization and crosslinking

Olsson, Joel S.; Pham, Thanh Huong; Jannasch, Patric

Customer publications

Tuning poly(arylene piperidinium) anion-exchange membranes by copolymerization, partial quaternization and crosslinking

Olsson, Joel S.; Pham, Thanh Huong; Jannasch, Patric

Ion exchange membranes with high ionic contents typically suffer from excessive water uptake and dilution effects which compromise both mechanical properties and anion conductivity. In the present work we develop and compare partial quaternization, copolymerization and crosslinking as three different synthetic strategies to balance the ion exchange capacity (IEC), water…
3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order

Kotikian, Arda; Truby, Ryan L.; Boley, John William; White, Timothy J.; Lewis, Jennifer A.

(Natural) polymersApplicationCharacterizationCustomer publicationsLiquid crystalsMaterialOrientation analysisOtherTechniqueWAXS

3D Printing of Liquid Crystal Elastomeric Actuators with Spatially Programed Nematic Order

Kotikian, Arda; Truby, Ryan L.; Boley, John William; White, Timothy J.; Lewis, Jennifer A.

Liquid crystal elastomers (LCEs) are soft materials capable of large, reversible shape changes, which may find potential application as artificial muscles, soft robots, and dynamic functional architectures. Here, the design and additive manufacturing of LCE actuators (LCEAs) with spatially programed nematic order that exhibit large, reversible, and repeatable contraction with…