Faezeh Askari; Omid Ramezani; Esmaeil Rasooly Garmaroody; Seyed Rahman Djafari Petroudy; Faranak Mohammadkazemi
Volume 14, Issue 1 , April 2016, , Pages 125-136
Abstract
Contamination of environment by different pollutants is one of the most important concerns of environmental scientists in the last decade. Water insoluble hydrophilic polymers with the contaminants surface absorption potential are considered new materials in control and removal of pollutants. Carboxymethyl ...
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Contamination of environment by different pollutants is one of the most important concerns of environmental scientists in the last decade. Water insoluble hydrophilic polymers with the contaminants surface absorption potential are considered new materials in control and removal of pollutants. Carboxymethyl cellulose (CMC) powder with the purity of 87.7 % and 0.5 degree of substitution (DS) was utilized in the current research project. The aim was producing a superabsorbent by an environmentally-friendly approach based on bio-based materials. First, in order to insolubilize CMC powder, a wide range of temperature and time were experimented among which the combination of 165, 175 and 180 °C temperatures and 45, 60 and 90 minutes were selected respectively. Then, certain amount of heat-modified samples were weighted and dispersed in water and citric acid as cross-linking agent was added with 0.1, 0.3, 0.5, 2, 3.5, 5, 10, 15 and 20 addition levels based on polymer weight. The samples were evaluated through Tea Bag, Ionic Sensitivity, Absorption under Load (AUL), Deformability and Swelling Kinetic tests. The results showed that heat treatment reduced the consumption of cross-liking agent which the highest absorption capacity was observed in low cross-linker addition levels in all tests.
