Hybrids of Cellulose-TiO2 for Environmental Application

This work is based on the combination of the acid treated-cellulose and chemically adsorbed titanium(IV) oxide on its surface to obtain a hybrid material for application in water treatment to degrade organic compounds. The photocatalytic property was evaluated in the degradation of the methyl orange dye. The photodegradation activity was higher using the hybrid obtained from the cellulose whose hydrolysis was conducted at higher acid concentration, which resulted in smaller fiber diameter, as suggested by scanning electron microscopy.

Superabsorbent Hydrogel from Extracted Oil Palm Frond Waste Cellulose Using Microwave Irradioation for Cadmium Ion Removal from Aqueous Solution

This research report facile approach on dispersion of cellulose fiber extracted from oil palm frond waste in a “green-solution” prepared by using urea and sodium hydroxide while the polymerization is carried out using microwave to form hydrogels. Effects of adding cellulose was determined by comparing the swelling degree between 0% and 2% cellulose hydrogel. Results showed that swelling ratio enhanced by the presence of cellulose. SEM images exposed that hydrogel with cellulose has rough surface compared to the hydrogels without cellulose.

Chemical treatment and modification of jute fiber surface

In this work, jute fiber was used as a source of cellulose fiber. Chemical processes for the purification, mechanical dispersion in Ultra Turrax and modifications with titanium isopropoxide (TiP), 3-aminopropyltrimethoxysilane (APTMS), as well as double modification with both TiP and APTMS, were used to obtain fibers with reduced diameter and less agglomeration and adhesion to polar polymers such as polyamides. Fibers with a diameter close to 10 μm were observed by SEM after drying and pulverization.

Дослідження процесів біодеградації целюлозовмісних композитів у едафотопах рекреаційно-паркової зони м. Львова

 The biodegradation of cellulose composite in different edaphic conditions is researched. The research is conducted on a sample of biodegradable composite material on the bases of polypropylene filled with cellulose. Досліджено біодеструкцію целюлозовмісного композиту в різних едафічних умовах. Дослідження здійснено на зразку біодеградабельного композитного матеріалу на основі поліпропілену, наповненого целюлозою.

Copper Nanopartical Composites Based on Cellulose Derivatives

Polymer hydroxyethylcellulose matrix modification was made by mechanochemical method using copper containing nanoparticles, obtained by electrochemical reduction from copper sulphate solutions in water- ethanol medium. Interactions of copper containing nanoparticles with hydroxyethylcellulose were studies. Antimicrobial effect of the nanocomposites obtained was found.

Extraction and Characterization of Algerian Alfa Grass Short Fibers (Stipa Tenacissima)

Alfa fibers are cellulose-based fibers extracted from esparto grass leaves using alkaline procedure to remove noncellulosic substances such as pectin, lignin, and hemicelluloses. Morphological characterizations (length, width) of esparto fibers are analyzed. The cellulose fiber extracted was characterized by infrared spectroscopy, X-ray diffractometry, thermal analysis TG and DSC, optical and scanning electron micrographs (SEM).

Oxo-Biodegradability of Polyethylene Blends with Starch, Cellulose and Synthetic Additives

Polyethylene (PE) is a pollutant packaging and mulch material. Therefore, it is necessary to raise its oxo-biodegradability by additives. Oxo-biodegradation is the degradation of PE in two steps: oxidation followed by microorganisms biodegradation. In this study, starch and cellulose are compared with synthetic additives. The results reveal that starch and cellulose cannot increase oxygen absorption and oxygenation as good as synthetic additives. However, they increase water absorption and make the surface of the bulk polymer more porous.

A New Approach to the Creation of Carbon-Polymer Nanocomposites with Polyethylene as a Binder

Approach of obtaining molded composites on the basis of the mixtures of powders of nano-dispersed polyethylene, cellulose and ultra-dispersed carbonic materials has been developed. Тhese materials possess the assigned sorption properties and the physic-mechanical characteristics. Тhey are suitable for the usage in the process of cleaning and separation of gas mixtures.

Obtaining of High Purity Amorphous Silicon Dioxide from Rice Husk

Using maximum extraction of carbon-containing components the content of amorphous silicon dioxide was increased in the rice husk solid residue. In accordance with the hypothesis about the mechanism of extracting carbon-containing components from rice husk by liquid extractants, proper extractants were selected. The effect of main technological factors including process temperature, time and concentration of the extractants was determined.