On the Indirect Polyelectrolyte Titration of Cellulosic Fibers. Conditions for Charge Stoichiometry and Comparison with ESCA

Langmuir ◽  
2006 ◽  
Vol 22 (2) ◽  
pp. 824-830 ◽  
Author(s):  
A. Elisabet Horvath ◽  
Tom Lindström ◽  
Janne Laine
Keyword(s):  
Cellulosic Fibers ◽  
Polyelectrolyte Titration

Effect of cationic polyelectrolytes in contact-active antibacterial layer-by-layer functionalization

Holzforschung ◽  
2017 ◽  
Vol 71 (7-8) ◽  
pp. 649-658 ◽  
Author(s):  
Chao Chen ◽  
Josefin Illergård ◽  
Lars Wågberg ◽  
Monica Ek
Keyword(s):  
Cellulose Fibers ◽  
Antibacterial Activities ◽  
Layer By Layer ◽  
Cellulosic Fibers ◽  
Dimethyl Ammonium ◽  
Charge Interaction ◽  
Modification Technique ◽  
Polyelectrolyte Titration ◽  
A Charge ◽  
Cationic Polyelectrolytes

AbstractContact-active surfaces have been created by means of the layer-by-layer (LbL) modification technique, which is based on previous observations that cellulose fibers treated with polyelectrolyte multilayers with polyvinylamine (PVAm) are perfectly protected against bacteria. Several different cationic polyelectrolytes were applied, including PVAm, two different poly(diallyl dimethyl ammonium chloride) polymers and two different poly(allylamine hydrochloride) polymers. The polyelectrolytes were self-organized in one or three layers on cellulosic fibers in combination with polyacrylic acid by the LbL method, and their antibacterial activities were evaluated. The modified cellulose fibers showed remarkable bacterial removal activities and inhibited bacterial growth. It was shown that the interaction between bacteria and modified fibers is not merely a charge interaction because a certain degree of bacterial cell deformation was observed on the modified fiber surfaces. Charge properties of the modified fibers were determined based on polyelectrolyte titration and zeta potential measurements, and a correlation between high charge density and antibacterial efficiency was observed for the PVAm and PDADMAC samples. It was demonstrated that it is possible to achieve antibacterial effects by the surface modification of cellulosic fibers via the LbL technique with different cationic polyelectrolytes.

Complex formation of modified chitosan and carboxymethyl cellulose and its effect on paper properties

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 29-35 ◽  
Author(s):  
PEDRAM FATEHI ◽  
LIYING QIAN ◽  
RATTANA KITITERAKUN ◽  
THIRASAK RIRKSOMBOON ◽  
HUINING XIAO
Keyword(s):  
Carboxymethyl Cellulose ◽  
Polymer System ◽  
Layer By Layer ◽  
Paper Strength ◽  
Anionic Polymer ◽  
Paper Properties ◽  
Modified Chitosan ◽  
Layer By Layer Assembly ◽  
Polyelectrolyte Titration ◽  
Layer Assembly

The application of an oppositely charged dual polymer system is a promising approach to enhance paper strength. In this work, modified chitosan (MCN), a cationic polymer, and carboxymethyl cellulose (CMC), an anionic polymer, were used sequentially to improve paper strength. The adsorption of MCN on cellulose fibers was analyzed via polyelectrolyte titration. The formation of MCN/CMC complex in water and the deposition of this complex on silicon wafers were investigated by means of atomic force microscope and quasi-elastic light scattering techniques. The results showed that paper strength was enhanced slightly with a layer-by-layer assembly of the polymers. However, if the washing stage, which was required for layer-by-layer assembly, was eliminated, the MCN/CMC complex was deposited on fibers more efficiently, and the paper strength was improved more significantly. The significant improvement was attributed to the extra development of fiber bonding, confirmed further by scanning electron microscope observation of the bonding area of fibers treated with or without washing. However, the brightness of papers was somewhat decreased by the deposition of the complex on fibers. Higher paper strength also was achieved using rapid drying rather than air drying.

Experimental Research of Building Materials Based on the Natural Cellulosic Fibers under Biogenic Acidic Exposition

2015 ◽  
Vol 1 (5) ◽  
pp. 250-254
Author(s):  
Adriana Eštoková ◽  
Alena Luptáková ◽  
Martina Kovalčíková ◽  
Nadezda Stevulova
Keyword(s):  
Experimental Research ◽  
Building Materials ◽  
Cellulosic Fibers

Characterization of Natural Cellulosic Fibers from Stem of Symphirema Involucratum Plant

2021 ◽  
pp. 1-16 ◽  
Author(s):  
Juvvi Siva Naga Raju ◽  
Melvin Victor Depoures ◽  
JABIHULLA Shariff ◽  
SUDHIR Chakravarthy
Keyword(s):  
Cellulosic Fibers

scholarly journals Investigation into the color stripping of the pigment printed cotton fabric using the ozone assisted process: A study on the decolorization and characterization

2021 ◽  
Vol 16 ◽  
pp. 155892502199275
Author(s):  
Ajinkya Powar ◽  
Anne Perwuelz ◽  
Nemeshwaree Behary ◽  
Le vinh Hoang ◽  
Thierry Aussenac ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Photoelectron Spectroscopy ◽  
Treatment Time ◽  
Pilot Scale ◽  
Chemical Recycling ◽  
X Ray ◽  
Cellulosic Fibers ◽  
Dyeing Process ◽  
Cellulosic Textiles ◽  
Ozonation Process

Color stripping is one of the most convenient ways to rectify the various shade faults occurred during printing or dyeing process of textiles. But, the conventional chemical assisted process poses serious risk of the environmental pollution. Secondly, the chemical recycling of the cellulosic fibers may be disrupted due to the presence of the impurities like colorants, finishes, and the additives in the discarded textiles. So, there is a need to study ways to remove such impurities from the discarded cellulosic textiles in a sustainable manner. This work examines the decolorization of the pigment prints on cellulosic fabrics at pilot scale using an ozone-assisted process. The effect of varying pH, ozone concentration and the treatment time on the decolorization of the pigment prints was optimized using the response surface methodology technique. The effects of ozonation process parameters on the mechanical properties of cellulosic cotton fabric were measured. Decolorization of pigment printed samples was studied with respect to the surface effects by a scanning electron microscopy (SEM), and the chemical removal effects of ozonation treatment were studied using X-ray photoelectron spectroscopy. The possible mechanism regarding the action of ozone for the decolorization is discussed.

Functionalization of cellulosic fibers with a kaolinite-TiO2 nano-hybrid composite via a solvothermal process for flame retardant applications

2021 ◽  
Vol 266 ◽  
pp. 118108
Author(s):  
Carlos Rafael Silva de Oliveira ◽  
Marcos Antonio Batistella ◽  
Selene Maria de Arruda Guelli Ulson de Souza ◽  
Antônio Augusto Ulson de Souza
Keyword(s):  
Flame Retardant ◽  
Hybrid Composite ◽  
Solvothermal Process ◽  
Cellulosic Fibers

scholarly journals FIBexDB: A New Online Transcriptome Platform to Analyze Development of Plant Cellulosic Fibers

2021 ◽  
Author(s):  
Natalia Mokshina ◽  
Oleg Gorshkov ◽  
Hironori Takasaki ◽  
Hitomi Onodera ◽  
Shingo Sakamoto ◽  
...  
Keyword(s):  
Cellulosic Fibers
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