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Kiriinya, L.K. (author), Kwakernaak, M.C. (author), Van den Akker, Simone C.D. (author), Verbist, Guy L.M.M. (author), Picken, S.J. (author), Kelder, E.M. (author)We present a sustainable, inherently safe battery chemistry that is based on widely available and cheap materials, that is, iron and manganese hosted in alginate bio-material known from the food and medical industry. The resulting battery can be recycled to allow circularity. The electrodes were synthesised by the alginate caging the multi...journal article 2023
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Pereira Espíndola, S. (author), Norder, B. (author), Koper, G.J.M. (author), Picken, S.J. (author)Biopolymers are abundant, renewable, and biodegradable resources. However, bio-based materials often require toughening additives, like (co)polymers or small plasticizing molecules. Plasticization is monitored via the glass transition temperature versus diluent content. To describe this, several thermodynamic models exist; nevertheless, most...journal article 2023
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Elhami, Vahideh (author), van de Beek, Noor (author), Wang, Liangshin (author), Picken, S.J. (author), Tamis, J. (author), Sousa, João A.B. (author), Hempenius, Mark A. (author), Schuur, Boelo (author)(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) obtained from waste/wastewater using a mixed microbial culture (MMC) usually varies in its properties due to daily variation in the waste/wastewater composition applied as feedstock. In the current study, the average molecular weight (MW) of PHBV was purposely reduced from about 1 MDa to about...journal article 2022
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Vermeer, C.M. (author), Nielsen, Maaike (author), Eckhardt, Vincent (author), Hortensius, Matthijs (author), Tamis, J. (author), Picken, S.J. (author), Meesters, G.M.H. (author), Kleerebezem, R. (author)The biotechnological production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) derived from organic waste streams by mixed microbial communities is well established at the pilot-level. However, there is limited research on the recovery of the biopolymer from the microbial biomass, while its impact on product quality and product costs...journal article 2022
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Greidanus, A.J. (author), Delfos, R. (author), Picken, S.J. (author), Westerweel, J. (author)The interaction between a turbulent boundary layer flow and compliant surfaces is investigated experimentally. Three viscoelastic coatings with different material stiffnesses are used to identify the general surface response to the turbulent flow conditions. For the softest coating, the global force measurements show two obvious regimes of...journal article 2022
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Ghanbari, E. (author), Krishnamurthy, Aravind (author), Picken, S.J. (author), Klop, Enno A. (author), Bannenberg, L.J. (author), van Esch, J.H. (author)The crystal structure and phase behavior of bisamide gelators are investigated using differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy, X-ray diffraction (XRD), and molecular modeling, aiming at a better understanding of bisamide gel systems. A homologous series of bisamide model compounds (nBAs) was prepared...journal article 2022
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Fox, Ryan J. (author), Hegde, Maruti (author), Cole, Daniel P. (author), Moore, Robert B. (author), Picken, S.J. (author), Dingemans, T.J. (author)We report on the morphology and mechanical properties of nanocomposite films derived from aqueous, hybrid liquid crystalline mixtures of rodlike aggregates of a sulfonated, all-aromatic polyamide, poly(2,2′-disulfonyl-4,4′-benzidine terephthalamide) (PBDT), and graphene oxide (GO) platelets. An isothermal step at 200 °C facilitates in situ...journal article 2022
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van Straten, Bart (author), Robertson, P.D. (author), Oussoren, H. (author), Pereira Espíndola, S. (author), Ghanbari, E. (author), Dankelman, J. (author), Picken, S.J. (author), Horeman, T. (author)Background<br/>Face masks, also referred to as half masks, are essential to protect healthcare professionals working in close contact with patients with COVID-19-related symptoms. Because of the Corona material shortages, healthcare institutions sought an approach to reuse face masks or to purchase new, imported masks. The filter quality of...journal article 2021
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Picken, S.J. (author), Filonenko, G.A. (author)Polymer glasses have an irregular structure. Among the causes for such complexity are the chemically distinct chain end groups that are the most abundant irregularities in any linear polymer. In this work, we demonstrate that chain end induced defects allow polymer glasses to create confined environments capable of hosting small emissive...journal article 2021
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Pereira Espíndola, S. (author), Pronk, M. (author), Zlopasa, J. (author), Picken, S.J. (author), van Loosdrecht, Mark C.M. (author)Wastewater solids could be an attractive source of secondary raw cellulose, mainly originating from toilet paper. Cellulose can be recovered through sieving of raw wastewater, return sludge, or excess sludge. In particular, a large fraction of cellulose (13–15%) can be found in the excess sludge of the aerobic granular sludge produced by the...journal article 2021
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Hegde, M. (author), Yang, Lin (author), Vita, Francesco (author), van de Watering, R. (author), Norder, B. (author), Lafont, U.L. (author), Francescangeli, Oriano (author), Picken, S.J. (author), Dingemans, T.J. (author)Combining polymers with small amounts of stiff carbon-based nanofillers such as graphene or graphene oxide is expected to yield low-density nanocomposites with exceptional mechanical properties. However, such nanocomposites have remained elusive because of incompatibilities between fillers and polymers that are further compounded by...journal article 2020
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Westsson, E.E. (author), Picken, S.J. (author), Koper, G.J.M. (author)Magnetic field effects can provide a handle on steering chemical reactions and manipulating yields. The presence of a magnetic field can influence the energy levels of the active species by interacting with their spin states. Here we demonstrate the effect of a magnetic field on the electrocatalytic processes taking place on platinum-based...journal article 2020
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Fox, Ryan J. (author), Forest, M. Gregory (author), Picken, S.J. (author), Dingemans, Theo J. (author)We report on the shear rheology of liquid crystalline solutions composed of charged, rodlike polymers that form supramolecular assemblies dispersed in water. Under steady shear, we observe shear thickening behavior, followed by a hesitation in the viscosity accompanied by an extremely narrow range of negative first normal stress difference....journal article 2020
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El Asjadi, S. (author), Lakshminarayanan, V. (author), Besseling, N.A.M. (author), Picken, S.J. (author), Mendes, E. (author)This study investigates the stabilization of oil/water emulsions as a function of addition of a biopolymer (scleroglucan) which acts as an emulsion stabilizer. Rheological characterization in the form of controlled stress creep measurements has been carried out and it reveals the colloidal gel exhibiting a delayed yielding in a certain...journal article 2020
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Westsson, E.E. (author), Picken, S.J. (author), Koper, G.J.M. (author)We report on the effect of lattice strain in three different types of core-shell electrocatalyst particles on their catalytic activity towards the oxygen reduction reaction. We decouple the changes in catalytic activity with respect to a geometrical and an energetic contribution, both of electronic origin.journal article 2019
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Broerse, D.B.T. (author), Norder, B. (author), Govers, Rob (author), Sokoutis, Dimitrios (author), Willingshofer, Ernst (author), Picken, S.J. (author)Stress-dependent nonlinear upper mantle rheology has a firm base in rock mechanical tests, where this nonlinearity results from dislocation creep of minerals. In the last few decades there has been some attention to nonlinear, power-law, materials for application in scaled analogue experiments for tectonic processes. However, studies...journal article 2019
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Montano, V. (author), Picken, S.J. (author), van der Zwaag, S. (author), Garcia, Santiago J. (author)Starting from experimental macro-rheological data, we develop a fitting protocol that succeeded in the separation of the overlapping relaxation phenomena in the dissipative regime for a set of intrinsic healing polymers healing most effectively near their glass transition temperature T <sub>g</sub> . To allow for a proper deconvolution, the...journal article 2019
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El Asjadi, S. (author), Nederpel, Q. A. (author), Cotiuga, I. M. (author), Picken, S.J. (author), Besseling, N.A.M. (author), Mendes, E. (author), Lommerts, B. J. (author)In this study, we investigated the Stabilization of bitumen emulsions by scleroglucan, a rigid triple-helix forming biopolymer, in combination with a pH-sensitive cationic surfactant. Various aspects of the emulsification process and the final composition influence the Stabilization. We examined two different methods to add scleroglucan to...journal article 2018
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Chu, L. (author), Korobko, A.V. (author), Cao, A. (author), Sachdeva, S. (author), Liu, Z. (author), de Smet, L.C.P.M. (author), Sudhölter, Ernst J. R. (author), Picken, S.J. (author), Besseling, N.A.M. (author)The Hamaker constant between graphene oxide and silica, which quantifies the strength of van der Waals forces is determined, by mimicking a “vacuum spacer” in an atomic force microscopyforce study. It is demonstrated that, a 2D spacer is expected to yield an accurately defined separation, owing to the high atom density and strength in planar...journal article 2017
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Zlopasa, J. (author), Norder, B. (author), Koenders, E.A.B. (author), Picken, S.J. (author)Here we report on a study of a rheological behavior of sodium alginate and montmorillonite suspension. We find that viscoelastic behavior of this suspension is dramatically affected with increasing volume fraction of montmorillonite platelets. Addition of montmorillonite generally leads to gel formation, which is attributed to interactions of...journal article 2016