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Your search keyword '"Grande, Philipp M."' showing total 25 results
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25 results on '"Grande, Philipp M."'

3. Cell wall composition and biomass saccharification potential of Sida hermaphrodita differ between genetically distant accessions

Author

Schrey, Silvia D., primary, Martinez Diaz, Jimena, additional, Becker, Lukas, additional, Mademann, Jane A., additional, Ohrem, Benedict, additional, Drobietz, Dagmar, additional, Chaloupsky, Pavel, additional, Jablonowski, Nicolai D., additional, Wever, Christian, additional, Grande, Philipp M., additional, Pestsova, Elena, additional, and Klose, Holger, additional

Published
2023
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6. Toward a Greener Bioeconomy: Synthesis and Characterization of Lignin–Polylactide Copolymers.

Author

Langletz, Tim, Grande, Philipp M., Viell, Jörn, Wolters, Daniel, Tonn, Josia, Klose, Holger, Schriever, Sascha G., Hoffmann, Alexander, Jupke, Andreas, Gries, Thomas, and Herres-Pawlis, Sonja

Subjects
LIGNINS, BIODEGRADABLE plastics, COPOLYMERS, SUSTAINABLE development, PACKAGING materials, GLASS transition temperature
Abstract

In the modern world, plastics have become indispensable. Due to their properties, they are used for a wide variety of applications ranging from packaging materials to textiles and medical technology. The vast majority of these plastics are made from finite fossil feedstocks that will need to be replaced in the long term to meet consumer demands in the future. Intensive research is being conducted into alternative bio‐based feedstocks to replace petroleum‐based plastics with more environmentally friendly variants. This includes polylactide, a polyester derived from lactic acid, which is mainly used as packaging material. In this work, star‐shaped copolymers consisting of polylactide and OrganoCat lignin with varying lignin loadings are synthesized using a "grafting‐from" approach directly from the lactide melt using a zinc‐based guanidine catalyst. This method proves to be efficient and copolymers can be produced after 30 min to three hours with high lactide conversions. Kinetic studies are performed to investigate the influence of different lignin loadings on the polymerization rate and 31P NMR experiments are used to analyze the functionalization of the lignin. Thermal analysis reveals an increase of the glass transition temperature and a higher thermal decomposition temperature with increasing lignin content. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Insights into cell wall disintegration of Chlorella vulgaris

Author

Weber, Sophie, Grande, Philipp M., Blank, Lars M., and Klose, Holger

Subjects
Algae, Science, Carbohydrates, Glycobiology, Research and Analysis Methods, Mechanical Treatment of Specimens, Biochemistry, Cell Walls, Cell Wall, Polysaccharides, Microalgae, Biomass, ddc:610, Cellulose, Cell Disruption, Multidisciplinary, Organic Compounds, Hydrolysis, Organic Chemistry, Monosaccharides, Chemical Compounds, Organisms, Chemical Reactions, Biology and Life Sciences, Eukaryota, Starch, Cell Biology, Plants, Chemistry, Glucose, Specimen Disruption, Specimen Preparation and Treatment, Physical Sciences, Medicine, Cellular Structures and Organelles, Chlorella vulgaris, Research Article
Abstract

PLOS ONE 17(1), e0262500 (2022). doi:10.1371/journal.pone.0262500, Published by PLOS, San Francisco, California, US

Published
2022
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12. Lignin Precipitation and Fractionation from OrganoCat Pulping to Obtain Lignin with Different Sizes and Chemical Composition

Author

Weidener, Dennis, Holtz, Arne Matthias, Klose, Holger, Jupke, Andreas, Leitner, Walter, and Grande, Philipp M.

Subjects
biorefinery, Molecular Structure, Plant Extracts, antisolvent precipitation, β-O-4-linkage, Chemical Fractionation, Lignin, Article, lcsh:QD241-441, Molecular Weight, lignocellulose, lcsh:Organic chemistry, Solubility, ddc:540, Fagus, Chemical Precipitation, Biomass, OrganoCat pulping, Furans, lignin characterization, Filtration, lignin fractionation
Abstract

Molecules 25(15), 3330 (2020). doi:10.3390/molecules25153330, Published by MDPI22525, Basel

Published
2020
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16. Selective lignin fractionation using CO2-expanded 2-methyltetrahydrofuran (2-MTHF).

Author

Weidener, Dennis, Klose, Holger, Graf von Westarp, William, Jupke, Andreas, Leitner, Walter, Domínguez de María, Pablo, and Grande, Philipp M.

Subjects
LIGNINS, CHEMICAL properties, LIGNIN structure, RAW materials, SOLVATION
Abstract

Upon CO2 pressurization, 2-methyltetrahydrofuran (2-MTHF) expands. The expanded phase exerts different solvation properties, triggering fractional lignin precipitation. Depending on the actual CO2 pressure, fractions of lignin with a gradient of different sizes and chemical properties are selectively precipitated. A range of raw materials and applications may be thus reached. [ABSTRACT FROM AUTHOR]

Published
2021
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18. Lignocellulose Fractionation Using Recyclable Phosphoric Acid: Lignin, Cellulose, and Furfural Production.

Author

Weidener, Dennis, Leitner, Walter, Domínguez de María, Pablo, Klose, Holger, and Grande, Philipp M.

Subjects
LIGNOCELLULOSE, HEMICELLULOSE, FURFURAL, PHOSPHORIC acid, CELLULOSE, LIGNINS, CATALYSTS recycling, ACID catalysts
Abstract

The conversion of lignocellulose into its building blocks and their further transformation into valuable platform chemicals (e. g., furfural) are key technologies to move towards the use of renewable resources. This paper explored the disentanglement of lignocellulose into hemicellulose‐derived sugars, cellulose, and lignin in a biphasic solvent system (water/2‐methyltetrahydrofuran) using phosphoric acid as recyclable catalyst. Integrated with the biomass fractionation, in a second step hemicellulose‐derived sugars (mainly xylose) were converted to furfural, which was in situ extracted into 2‐methyltetrahydrofuran with high selectivity (70 %) and yield (56 wt %). To further increase the economic feasibility of the process, a downstream and recycling strategy enabled recovery of phosphoric acid without loss of process efficiency over four consecutive cycles. This outlines a more efficient and sustainable use of phosphoric acid as catalyst, as its inherent costs can be significantly lowered. [ABSTRACT FROM AUTHOR]

Published
2021
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