The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Cellulose fibers suspended in an aqueous medium were placed in contactwith increasing amounts of either a cationic or an anionic surfactant. Only theformer was adsorbed, forming admicellar morphologies. The addition of alkenylmonomers to these systems and their subsequent polymerization resulted in theformation of polymer both in the aqueous medium and around the fibers. Thelatter 'coating', which...
Cellulose-binding domains have been isolated from various cellulases, and proteins, which lack hydrolytic activity. The hypothesis that a cellulose-binding domain can be used to alter surface and mechanical properties of paper was tested. Two cellulose-binding domains from Clostriium cellulovorans were fused to form a cellulose crosslinking protein (CCP). The recombinant bifunctional cellulose-binding...
A new method is applied to classify water, termed ‘hard-to-remove (HR) water’, in a cellulosic fiber and water system from an isothermal thermogravimetric analysis (TGA). The hard-to-remove (HR) water content is defined as the moisture ratio (g of water / g of dry sample) of the fiber-water system at the transition between the constant rate zone and the falling rate zone of evaporative change in mass...
The heat of vaporization (Hvap) of water associated with cellulose fibers versus moisture ratio was determined using modulated differential scanning calorimetry. A steep increase in the Hvap for decreasing moisture ratio was observed at low moisture ratios (0.0–0.3 g/g), indicating a higher energy required to evaporate water interacting with the cellulose. The water molecules with elevated Hvap...
The present work presents and discusses the interrelation between composition, morphology, thermal history, mechanical and barrier properties to oxygen and limonene of composites of HDPE/MA-PE/cellulose fibers of significant interest in, among others, food packaging applications. From the overall results, it was observed that increasing the loading of purified alpha-cellulose fibers in the polyethylene...
The adsorption of guanidine polymer modified starches on cellulose fibers was investigated along with the systematic studies on various influencing factors including temperature, pH, ionic strength and charge density of the starches. The AFM results revealed the relationship between the adhesion force and adsorption capacity. The adsorption capacity is not necessarily proportional to the adhesion...
This work describes the partial oxypropylation of filter paper cellulose fibers, employing two different basic catalyst, viz., potassium hydroxide and 1,4-diazabicyclo [2.2.2] octane, to activate the hydroxyl groups of the polysaccharide and thus provide the anionic initiation sites for the “grafting-from” polymerization of propylene oxide. The success of this chemical modification was assessed by...
The vapor pressure of water was measured for binary mixtures with cellulose containing fabrics at 37 °C by means of two complementary methods. Different types of fabrics were studied: One consisting exclusively of cellulose fibers, either of natural origin (cotton) or regenerated from solutions in the mixed solvent NMMO/water (Lyocell fibers, CLY) and another kind of fabric containing polyethylene...
The aim of this study was to find newly structured biopolymer blends bearing those adjustable features able to produce innovative materials. Apart from cellulose derivatives (cellulose carbamate and carboxymethyl cellulose), mannans (guar gum, locust bean gum, and tragacanth gum), xylan, starch (cationized), ι-carrageenan, and xanthan were chosen as blend polysaccharides for cellulose as matrix. In...
Today most of commercial Li-ion batteries (LIBs) are manufactured using toxic solvents and synthetic polymer binders. In order to lower the cost and the environmental impact of LIBs an effort must be made to identify low-cost and environmentally friendly materials and processes. In this work, flexible, self-standing and easily recyclable LiFePO4 cathodes are obtained using cellulose fibers as biosourced...
The present study reports a simple method to control the mechanical and surface properties of cellulose fiber networks and to protect them from humidity, without altering their initial morphology. This is achieved by dip coating the fiber networks in solutions containing different amounts of ethyl cyanoacrylate monomer (ECA). Under ambient humidity and due to the presence of the -OH groups of the...
Cellulose, the most abundant renewable organic material on earth, exhibits outstanding properties and useful applications, but also presents a tremendous challenge with regard to economical and environmentally friendly chemical processing. The viscose process, more than 100 year old is still the most widely utilized technology to manufacture regenerated cellulose fibers and films. Viscose fibers are...
As an almost inexhaustible material with unique and outstanding properties, cellulose presents promising potential in the practical issues. In this study, the cellulose fibers-supported cobalt tetra(2,4-dichloro-1,3,5-triazine)aminophthalocyanine(denoted as Co-TDTAPc-F) catalyst and H2O2 system was introduced for removing organic dyes from aqueous solution with large amounts of dyeing auxiliaries...
Merely silver nanoparticles (AgNPs) were synthesized as a colloidal solution without containing reducing or stabilizing agents using a totally green, one-pot, quite simple method. The unique advantage of this method is the use of a removable reducing agent to produce merely AgNPs. The reducing features and insolubility property of cellulose fibers make them the preferred potential removable reducing...
Magnesium carbonate whiskers/cellulose fibers hybrid paper was successfully prepared via in situ synthesis process, and the flame retardancy and tensile strength properties were investigated. The effects of magnesium salt type, initial magnesium salt concentration, temperature, time and pH value were also detected. The hybrid paper was characterized by X-ray diffraction, Fourier transform infrared...
In this work the macrophyte Typha domingensis was characterized. Cellulose nanocrystals (CNCs) were extracted and pretreated with alkali at 80 °C followed by hydrolysis with sulfuric acid 34 % (w/w) at 80 °C for 15 min. The plants were separated into two groups: the young and senescent. Then each plant was sectioned into three parts (top, bottom and middle). The middle and the bleached middle fibers...
A facile single-step hydrothermal method was used for the decoration of titania (TiO2) nanoparticles (diameter ca. 40–250 nm) on the surface of cellulose fibers. These cellulose fibers decorated with TiO2 nanoparticles were used to prepare paper matrices by the handsheet-making procedure. The papers showed excellent photocatalytic activity by degrading methyl orange in the presence of UV light and...
Highly purified cellulose fibers were directly welded at nanoscale using dimethyl acetamide containing lithium chloride (DMAc/LiCl) solvent. For welding fibers directly at nanoscale, lignin and hemicelluloses were first removed from the nano-disconnection between laterally adjacent nanofibrils through proper bleaching; hence, nano-scale pores were created between lateral nanofibrils. The solvent...
Self-doped polyaniline/cellulose fibers (SPANI/CF) hybrid was in situ prepared by copolymerization of aniline and metanilic acid in presence of cellulose fibers to improve its dedoping-resistant ability. The results indicated that the SPANI/CF hybrid was remarkably more resistant to dedoping by alkaline aqueous solution than the polyaniline/cellulose fibers (PANI/CF) hybrid. Self-doping did not increase...
A copper-based metal–organic frameworks/cellulose fibers (HKUST-1/CF) composite was prepared by in situ and green method. Scanning electron microscopy with energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and X-ray diffraction analyses revealed the functionalization of cellulose fibers (CFs) was successfully achieved by in situ deposition of HKUST-1 via a DMF-free green...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.