Surface modification of cellulose fibers. I. Spectroscopic characterization of surface-modified cellulose fibers and their copolymerization with styrene

1985 ◽  
Vol 30 (6) ◽  
pp. 2419-2429 ◽  
Author(s):  
Pawel Zadorecki ◽  
Per Flodin
Keyword(s):  
Surface Modification ◽  
Cellulose Fibers ◽  
Spectroscopic Characterization ◽  
Surface Modified ◽  
Modified Cellulose

scholarly journals BTX Removal from Open Aqueous Systems by Modified Cellulose Fibers and Evaluation of Competitive Evaporation Kinetics

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3154
Author(s):  
Antonio Tursi ◽  
Francesco Chidichimo ◽  
Rita Bagetta ◽  
Amerigo Beneduci
Keyword(s):  
Organic Compounds ◽  
Low Cost ◽  
Water System ◽  
Open Water ◽  
Cellulose Fibers ◽  
Petroleum Products ◽  
Pollutant Concentrations ◽  
Surface Modified ◽  
Adsorption Desorption ◽  
Modified Cellulose

BTX stands for Benzene, Toluene, and Xylenes, which are volatile organic compounds contained in petroleum products such as gasoline. They have negative health effects and are sadly known for soil, air, and water contamination. This paper provides an investigation on BTX removal from open water systems like those represented by natural water bodies. In such systems, the evaporation process takes place, stealing the pollutants from the aqueous matrix by transferring them into the air, resulting in a secondary pollution. To prevent this situation, adsorption of these organic compounds on cellulose fibers, extracted from Spanish Broom vegetable, was studied. Raw and surface modified cellulose fibers were used for this purpose. The second ones were hydrophobized by two different green and low-cost functionalization systems (no solvent urethane functionalization and low pressure plasma treatments). Batch experiments were performed in an open system where BTX underwent two competing removing mechanisms: volatilization, and adsorption/desorption on/from the fibers dispersed in the water system. A mathematical model was implemented for the interpretation of the observed time-varying pollutant concentrations and the estimation of the kinetic constants for adsorption, desorption, and evaporation. The developed model, provided with the aforementioned parameters calibrated for each type of fibers, was then used for the prediction of their adsorption capacities both into open and closed systems.

Surface Modification and Characterization of Perovskite-Type Mixed Ionic-Electronic Conductors

2004 ◽  
Vol 449-452 ◽  
pp. 1297-1300
Author(s):  
Shi Woo Lee ◽  
Tae Ho Shin ◽  
Kee Sung Lee ◽  
In Sub Han ◽  
Doo Won Seo ◽  
...  
Keyword(s):  
Surface Modification ◽  
Oxygen Permeability ◽  
Electronic Conductivity ◽  
Conducting Oxides ◽  
Mixed Ionic Electronic Conductors ◽  
Coated Surfaces ◽  
Surface Modified ◽  
Electronic Conductors ◽  
Perovskite Type

Surface modification effects have been investigated for perovskite-type mixed ionic-electronic conductors. As the mixed conducting oxides show both ionic and electronic conductivity, these can be applied as oxygen permeable membranes. We have coated surfaces of the perovskite-type mixed conductors, LaSrCoFeO3 and LaSrGaFeO3, with LaSrCoO3 and investigated the effects on oxygen permeability. Enhanced oxygen permeability was achieved when the LaSrGaFeO3 membrane was surface-modified with LaSrCoO3. However, there was no effect on oxygen permeability of LaSrCoFeO3 even when the surface of which was modified. The morphological factors related with electrochemical reactions have also been discussed

Copper(I)oxide surface modified cellulose fibers—Synthesis, characterization and antimicrobial properties

2014 ◽  
Vol 254 ◽  
pp. 344-351 ◽  
Author(s):  
Hossam E. Emam ◽  
Avinash P. Manian ◽  
Barbora Široká ◽  
Heinz Duelli ◽  
Petra Merschak ◽  
...  
Keyword(s):  
Antimicrobial Properties ◽  
Cellulose Fibers ◽  
Oxide Surface ◽  
Surface Modified ◽  
Modified Cellulose

Surface Modification and Characterization of Photodegradable Polystyrene-TiO2 Nanocomposites

2013 ◽  
Vol 372 ◽  
pp. 128-131
Author(s):  
Achanai Buasri ◽  
Pornpimon Loakhonka ◽  
Tanaporn Benjapolchai ◽  
Nitchanan Chusripet ◽  
Vorrada Loryuenyong
Keyword(s):  
Surface Modification ◽  
Physical Properties ◽  
Thick Films ◽  
Compression Molding ◽  
Optical Bandgap ◽  
Molding Method ◽  
Surface Modified

In this study, polystyrene (PS) nanocomposites with TiO2 and surface-modified TiO2 nanoparticles were prepared by compression molding method. TiO2 nanoparticles were modified by 3-(methacryloxy) propyl trimethoxysilane (MPS). The resulting nanocomposite thick films were compared with pure polystyrene. It was found that MPS-modified TiO2 nanoparticles were better dispersed in PS matrix due to their hydrophobic characteristics. The addition of small amount of TiO2 nanoparticles could greatly decrease the optical bandgap of PS from 4.0 eV in pure PS to less than 3.0 eV in PS-TiO2 nanocomposite. The effects of surface modification and UVC irradiation on the physical properties and the degradation of nanocomposites were investigated.

Sign in / Sign up

Export Citation Format

Share Document