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Synthesis and characterization of waterborne polyurethane and polyurethane-urea towards eco-friendly materials by cellulose nanocrystals and plant extracts incorporation
(2017-02-23)
In this work, environmentally friendly anionic waterborne polyurethane and polyurethane-urea dispersions were synthesized in order to prepare films by casting. The effect of molar composition and synthesis route were ...
Development and application of thermal desorption techniques for the measurement of PAHs in ambient air
(2017-02-17)
Entre todos los contaminantes, los hidrocarburos aromáticos policíclicos (HAPs) han sido objeto de uninterés creciente en los últimos años. Debido a sus características (propiedades carcinogénicas,mutagénicas e inmunotóxicas) ...
Biobased polyurethanes and nanocomposites. From structure/properties relationship to shape-memory behavior
(2017-05-26)
This work deals with the increase of the renewability of different porous and solid (thermoplastic and crosslinked) polyurethanes and bionanocomposites, by the incorporation of different reactants and nanoentities from ...
Click chemistry: an efficient toolbox for the design of chitosand-based hydrogels for biomedicine
(2020-05-28)
The present thesis was focused on the development of new gel-type biomaterials form chitosan withexcellent stimuli-responsive properties using different click reactions. To this end, in the first place,chitosan was endowed ...
Optimization and Validation of Thermal Desorption Gas Chromatography-Mass Spectrometry for the Determination of Polycyclic Aromatic Hydrocarbons in Ambient Air
(Hindawi, 2018-05-02)
Thermal desorption (TD) coupled with gas chromatography/mass spectrometry (TD-GC/MS) is a simple alternative that overcomes the main drawbacks of the solvent extraction-based method: long extraction times, high sample ...
Pyrolysis of lignocellulosic biomass in a continuous screw reactor: production of charcoal useful for metallurgical applications and optimization of pyrolysis vapors.
(2019-04-11)
Actualmente el calentamiento global que padece el planeta como consecuencia de emisiones masivas de gases de efecto invernadero (en especial el CO2) a la atmosfera supone uno de los desafíos medioambientales más graves a ...
Industrial wood modification by heat treatments
(2018-02-23)
El objetivo principal de este trabajo de tesis fue el de mejorar las propiedades naturales de la madera solida modificándola químicamente por medio de calor a altas temperaturas. La tecnología de termo-tratado ha despertado ...
Heterogeneous Catalytic Ozonation of Aniline-Contaminated Waters: A Three-Phase Modelling Approach Using TiO2/GAC
(MDPI, 2020-12-08)
This work aims to study the sustainable catalytic ozonation of aniline promoted by granular active carbon (GAC) doped with TiO2. Aniline was selected as a model compound for the accelerator manufacturing industries used ...
Cellulose Nanocrystal Membranes as Excipients for Drug Delivery Systems
(MDPI, 2016-12-12)
In this work, cellulose nanocrystals (CNCs) were obtained from flax fibers by an acid hydrolysis assisted by sonochemistry in order to reduce reaction times. The cavitation inducted during hydrolysis resulted in CNC with ...
Functional Chitosan Derivative and Chitin as Decolorization Materials for Methylene Blue and Methyl Orange from Aqueous Solution
(MDPI, 2019-02-01)
Dyes are classified as one of the major pollutants of water. They have negative impacts not only on environment but also on human health. In fact, wastewater that contains these harmful substances requires many types of ...