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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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Ghanbari, E. (author), Chen, Zian (author), Padmanabhan, P. (author), Picken, S.J. (author), van Esch, J.H. (author)We report a systematic study of the gelation behavior of nBA gelators in xylene, with odd and even n-methylene spacers between the amide groups (n = 5-10) and 17 carbons at each end. The melting temperatures (Tm0) of nBA gels are obtained from fitting our DSCN(T) model to the experimental DSC data. The found Tm0 of nBA gels is about 35 °C...journal article 2023
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Ghanbari, E. (author), Picken, S.J. (author), van Esch, J.H. (author)This study intends to develop design rules for binary mixture of gelators that govern their assembly behavior and subsequently explore the impact of their supramolecular assembly patterns on the gels’ rheological properties. To achieve these goals, nBA gelators with odd and even parities [n-methylene spacers between the amide groups (n = 5-10...journal article 2023
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Pereira Espíndola, S. (author), Zlopasa, J. (author), Picken, S.J. (author)High-performance bioinspired materials have shown rapid development over the last decade. Examples are brick-and-mortar hierarchical structures, which are often achieved via solvent evaporation. Although good properties are claimed, most systems are composed of stacked or intercalated platelets. Exfoliation is a crucial step to give ultimate...journal article 2023
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Pereira Espíndola, S. (author), Norder, B. (author), Jansen, K.M.B. (author), Zlopasa, J. (author), Picken, S.J. (author)Tailoring the order in hierarchical structures is a key goal of bioinspired nanocomposite design. Recently, nacre-like materials have been developed by solvent evaporation methods that are scalable and attain advanced functionalities. However, understanding the alignment mechanisms of 2D fillers, nanosheets, or platelets remains challenging....journal article 2023
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Ghanbari, E. (author), Picken, S.J. (author), van Esch, J.H. (author)We have developed an analytical method to quantitatively analyze differential scanning calorimetry (DSC) experimental data. This method provides accurate determination of thermal properties such as equilibrium melting temperature, latent heat, change of heat capacity which can be performed automatically without intervention of a DSC operator....journal article 2023
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Erdoğan, R.T. (author), Filonenko, G.A. (author), Picken, S.J. (author), Steeneken, P.G. (author), Westerveld, W.J. (author)Ultrasound is widely used in medical imaging, and photo-acoustics is an upcoming imaging modality for the diagnosis of diseases. Future applications require a large matrix of small, sensitive, and broadband ultrasound sensors. However, current high-end systems still use piezo-electric material to detect ultrasound, with limited sensitivity...conference paper 2023
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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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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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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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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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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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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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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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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