16 documents found, page 1 of 2

TiO2 quantum dots nanocoated soybean protein knitted fabric produced by layer-b...

This study the layer-by-layer self-assembly (lbl) technique was used for nanocoating of titanium dioxide quantum dots (TiO2QDs) on the soybean protein knitted (SPK) fabric. Chitosan was employed as cation agent for the electrostatic assembly. The synthesized TiO2QDs powder and TiO2QDs nanocoated SPK fabrics were evaluated by means of the characterization of their morphological, chemical, optical, and photocatal...

ZnO quantum dots coated on polylactic acid knitted fabric for photocatalytic ap...

Surface modification of ZnO quantum dots coated polylactic acid knitted fabric ...

In this work, ZnO quantum dots (ZnOQD) were synthesized by Sol–gel synthe- sis and impregnated on polylactic acid (PLA) knitted fabric through self- assembly of different cycles from layer-by-layer (LBL) using cationic agent Poly(diallydimethylammonium chloride) (PDDA). Then, morphological, chemi- cal and photocatalytic properties were studied. The results demonstrate that the synthesis provided 8 nm Wurtzite-t...

Ultrasound-assisted encapsulation of Sacha Inchi (Plukenetia volubilis Linneo.)...

Sacha inchi oil is rich in essential and non-essential fatty acids and other types of bioactive agents like tocopherols and polyphenolic compounds, which are very well-known antioxidants. In this study, the encapsulation of sacha inchi oil in alginate (AL) and chitosan (CS) nanoparticles was achieved with the assistance of high-intensity ultrasound. Nanoemulsion is the most effective delivery and high stability...

Modulating antioxidant activity and the controlled release capability of laccas...

Laccase from ascomycete Myceliophthora thermophila was used for the oxidation and grafting of catechin (CA) and chitosan (CS). The enzymatic grafting of CA into CS resulted in the improvement of natural properties of chitosan films. The successful grafting of CA to CS was supported by UV-Visible and Fourier transform infrared (FT-IR) spectroscopies. The differences in the molecular weight and the degree of deac...

Laccase-mediated catechin grafting to chitosan for modulating antioxidant, anti...

In the present study, laccase from ascomycete myceliophthora thermophila was used for the simultaneous reactions of catechin oxidation to produce reactive o-quinions and subsequent reaction with free amino groups in chitosan (CS) through Schiff-base and Michael addition types reactions. These reactions were proved by UV-vis and ATR-IR spectroscopy showing the changes of peaks shape or characteristic new peaks a...

Chitosan–lignosulfonates sono-chemically prepared nanoparticles: characterisati...

Due to their recognised properties of biocompatibility, biodegradability and sustainability, chitosan nanocarriers have been successfully used as new delivery systems. In this work, nanoparticles combining chitosan and lignosulfonates were developed for the first time for cosmetic and biomedical applications. The ability of lignosulfonates to act as a counter polyion for stabilisation of chitosan particles, gen...

Enzymatic colouration with laccase and peroxidases : recent progress

Enzymes have received significant attention as alternative catalysts to chemical auxiliaries in textile processing. For example, laccases and peroxidises are promising alternatives for bleaching and denim stone washing processes. Similarly, the ability to oxidise different phenolic substrates and dye precusors resulting in the formation of different coloured polymeric molecules is being exploited for developing...

Polyoxometalate/laccase-mediated oxidative polymerization of catechol for texti...

The synergistic effect between polyoxometalates (POMs), namely K5[SiW11VVO40]·11H2O and H5[PMo10 VV2O40]·13H2O and laccase from ascomycete Myceliophthora thermophila has been employed for the first time in oxidative polymerization of catechol. Such a laccase-mediator system allowed the formation of a relatively high molecular weight polycatechol as confirmed by size exclusion chromatography and electrospray ion...

In situ laccase-assisted overdyeing of denim using flavonoids

A laccase-mediated system for denim overdyeing using phenolic compounds was developed. Laccase from ascomycete Myceliophthora thermophila was able to oxidize phenolic compounds such as catechol and catechin and mediate their attachment to denim surfaces. Laccase-generated polymers gave rise to new coloration states from dark brown to green–yellow and replaced dyes in the overdyeing process. Process parameters, ...