جستجوی مقالات مرتبط با کلیدواژه "طیف سنجی مادون قرمز" در نشریات گروه "شیمی"

Limitation of natural resources especially cellulose reached by plant caused many researches has done for choosing on appropriate source of this material. Therefore, various methods have been evaluated for production cellulose. One of the significant methods of this biopolymer is using some different kind of bacteria which during recent decade has developed. Bacterial cellulose has produced by saccharide carbohydrate source. In this article, at first bacterial cellulose nano fibers layer were produced from three different saccharide sources (glucose, sakaroz & lactose) in static medium culture. Moisture regain, FTIR, XRD and SEM were measurement methods which applied to investigate the structure of bacterial cellulose nano fibrille and finally compared with two cellulosic fibre (cotton & viscose). The results indicated that the width of bacterial cellulose fibril nano fibre was less than 100 nanometer. The crystallinity of produced layer from three sources was less than cotton (10-15) and was more than viscose (9%-13%). The crystal structure of all produced bacterial cellulose was type 1 but the amount of cellulose was different. The result of Moisture regain showed more amounts compared to Cotton(5%) and less than regenerated cellulose and viscose (3%).