A5077428057- Polymer crystallization and properties
- biodegradable polymer synthesis and properties
- Advanced Sensor and Energy Harvesting Materials
- Microplastics and Plastic Pollution
- Fiber-reinforced polymer composites
- Additive Manufacturing and 3D Printing Technologies
- Electrospun Nanofibers in Biomedical Applications
- Flame retardant materials and properties
- Recycling and Waste Management Techniques
- Textile materials and evaluations
- Semiconductor Lasers and Optical Devices
- Advanced Fiber Optic Sensors
- Non-Invasive Vital Sign Monitoring
- Carbon Nanotubes in Composites
- Polymer Foaming and Composites
- Organic Light-Emitting Diodes Research
- Fire dynamics and safety research
- Surface Modification and Superhydrophobicity
- Polymer Nanocomposites and Properties
- Mechanical Behavior of Composites
- Natural Fiber Reinforced Composites
- Polymer composites and self-healing
- Synthesis and properties of polymers
- Geotechnical Engineering and Soil Stabilization
- Photonic Crystal and Fiber Optics
Swiss Federal Laboratories for Materials Science and Technology
2014-2024
Google (United States)
2017
University of St. Gallen
2005
Microplastic fibers (MPFs) have been found to be a major form of microplastics in freshwaters, and washing synthetic textiles has identified as one their main sources. The aim this work was use panel 12 different representative textile types investigate the source(s) MPF during washing. Using standardized tests, swatches tailored using five cutting/sewing methods were washed up 10 times. quantity fiber length determined image analysis. demonstrated great variability release, ranging from 210...
In recent years, several studies have investigated the flux of particulate plastic through municipal waste water treatment plants (WWTP). Challenges related to time consuming analytical methods limited number sampling points and detection limits hampered quantification nanoplastic microplastic fiber fluxes WWTPs. By synthesizing particles fibers labeled with a rare metal (Pd In, respectively) which can be measured as proxy for itself, we circumvented major pitfalls associated (micro)plastic...
Fiber fragments are one of the dominant types microplastics in environmental samples, suggesting that synthetic textiles a potential source to environment. Whereas release during washing is already well studied, much less known about abrasion processes. The may induce fibrillation fibers and therefore result formation finer fiber fragments. aim this study was investigate influence on microplastic fibrils. Fleece interlock textile swatches made polyester were abraded using tests with...
Synthetic fibers, especially polyester, have over past decades managed to overtake and dominate the textile industry. Microplastic fibers are shed from synthetic textiles during their user phase, primarily washing. However, there is little known about origin, except that they likely embedded in already since production. Therefore, we systematically examined presence of microplastic process yarn We started with one bale took samples opening step throughout carding, sliver handling finally...
Abstract PHBV is produced by bacteria as intracellular carbon storage. It advantageous concerning biocompatibility and biodegradability, but its low crystallization rate hinders the melt‐processing of fibers. This problem can be overcome combining with PLA in a core/sheath configuration introducing new spin pack concept. The resulting PHBV/PLA bicomponent fibers show an ultimate tensile stress up to 0.34 GPa E‐modulus 7.1 GPa. XRD reveals that alone responsible for strength. In vitro studies...
A flexible hollow polypropylene (PP) fiber was filled with the phase change material (PCM) polyethylene glycol 1000 (PEG1000), using a micro-fluidic filling technology. The fiber’s latent heat storage and release, thermal reversibility, mechanical properties, behavior as function of drawing, were characterized. Differential scanning calorimetry (DSC) results showed that both enthalpies melting solidification PCM encased within PP scarcely influenced by constraint, compared to unconfined...
Flame-retarded polymers, such as polyester textiles and sheets, are attracting attention with regard to their sustainability. Mechanical recycling is currently the most frequently used technique for improving circularity of plastics. However, one complication mechanical associated (still) inevitable mixtures polymers additives, which can influence material stability significantly deteriorate properties recycled products. In this study, we aim specifically investigate interactions between...
The inconsistency of available methods and the lack harmonization in current microplastics (MPs) analysis soils demand approaches for extraction quantification which can be utilized across a wide variety soil types. To enable robust accurate assessment workflows, PET MPs with an inorganic tracer (Indium, 0.2% wt) were spiked into individual subgroups standard varying compositions. Due to selectivity metal tracer, recovery rates could quickly quantitatively assessed using ICP-MS. evaluation...
With the increased occurrence of bacteria resistance to conventional antibiotics, development novel antimicrobials is urgently needed. Traditional biomaterials used for delivering these agents often struggle achieve sustained release while maintaining non-cytotoxic properties. In this study, we present an innovative approach using bacterial polyhydroxyalkanoates (PHA) as a carrier antimicrobial delivery, specifically designed wound healing applications. Octenidine dihydrochloride (OCT),...
Knowledge of an individual's skin condition is important for pressure ulcer prevention. Detecting early changes in through perfusion, oxygen saturation values, and on tissue subsequent therapeutic intervention could increase patients' quality life drastically. However, most existing sensing options create additional risk development due to further chafing the skin. Here, as a first component, we present flexible, photonic textile-based sensor continuous monitoring heartbeat blood flow....
Abstract This study attempts to promote biobased polyamide 56 (PA56) as a sustainable candidate replace commercial PA6 and PA66 when blended with polyethylene terephthalate (PET). Scanning transmission electron microscopy of the blends different PA56 contents reveals an immiscible morphology increase in size dispersed domains by increasing content. The steady‐state mixing torque kneader is decreased half adding 10 wt% PET. Further addition gradually increases this but does not surpass neat...
Luminescent solar concentrators (LSCs) collect incoming sunlight and direct it to a smaller-area photovoltaic cell. In the presented work, form factor illumination angle-dependent performance of LSCs consisting bi-component melt-spun fibers is demonstrated. Three thermoplastic polymers act as dispersing host material for luminescent dye Lumogen Red 305 (LR305). Molecular dynamics simulations provide numerical access Hildebrand solubility parameters, which are an estimate mixing compatibility...
Three novel alkyl sulfone bridged phosphorus (P) compounds namely 6,6′-(sulfonylbis(ethane-2,1-diyl))bis(dibenzo[c,e][1,2]oxaphosphinine 6-oxide) (SEDOPO), sulfonylbis(ethane-2,1-diyl))bis(diphenylphosphine oxide) (SEDPPO), and tetraphenyl (sulfonyl bis(ethane-2,1-diyl)) bis(phosphonate) (SEDPP) (i.e. phosphine oxide, phosphinate phosphonate, respectively) were synthesized via a Michael addition reaction with good yields (≥ 85%) at 200-g scale. They exhibited thermal stability above 250 °C,...