Abstract
Hydroxypropyl cellulose samples having different molar substitution were prepared through alkalization of cellulose followed by etherification reaction with propylene oxide. Factors affecting hydroxypropyl cellulose preparation like alkali concentration, propylene oxide concentration as well as etherification reaction temperature and duration were extensively studied. The prepared hydroxypropyl cellulose samples were characterized by measuring their molar substitution and then were tried for their water solubility which showed that samples having molar substitution of 0.4 or higher are completely water soluble. The obtained hydroxypropyl cellulose samples were used in the preparation of silver nanoparticles through reduction of silver nitrate. UV–vis spectra of the prepared silver nanoparticles reveal that full reduction of silver ions to silver nanoparticles takes place at pH 12.5. Optimum conditions for conversion of silver ions to silver nanoparticles are to use 0.3% solution of hydroxypropyl cellulose having molar substitution of 0.42, carrying out the reaction at 90°C for 90min.
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