Isolation of cellulose from rice straw and its conversion into cellulose acetate catalyzed by phosphotungstic acid

The copolimeryzation synthesis and swelling capacity of cellulose-poly superabsorbent (acrylic acid-co-acrylamide) based on rice straw

“…From table 1, it can be seen the rendement of cellulose obtained after isolation is 33.55%. The rendement of cellulose obtained in this work is smaller compared to Fan et al with the rendement of 58.0% [6], and Jiang et al [10] with the rendement of 35.06%. This difference was caused by rice straw source.…”

“…The isolation of rice straw cellulose was performed according to the reported method by Fan et al [6,7]. The rice straw was washed with warm water at temperature 40°C to remove impurities and solutes then dried at 60°C.…”

Synthesis of cellulose triacetate from cotton cellulose by using NIS as a catalyst under mild reaction conditions

“…The most commonly used acetylating reagents are acetic anhydride and acetyl chloride (Heinze & Liebert, 2004 of acetic anhydride to produce cellulose acetates (Hummel, 2004). Other reported methods for esterification include base-catalyzed transesterification, and ring-opening reactions (Connors & Albert, 1973;Das, Ali, & Hazarika, 2014;Fan et al, 2013;Heinze et al, 2006;Fan et al, 2014). Pyridine and 4-dimethyl-amino pyridine (DMAP) (Hofle, Steglich, & Vorbruggen, 1978) have been used as acylation catalysts in chemical synthesis.…”

A Spherical Zwitterionic Cellulose Acetate/ Graphene Oxide Composite Adsorbent for Efficient Removal of Cu2+ and Cd2+ from Aqueous Solution

“…2, for GO, the peak located at 3409 cm -1 is related to the stretching vibration adsorption peak of -OH, the characteristic absorption peak at 1724 cm -1 is stretching vibration of carbonyl (-C=O) of the -COOH groups, and the spectra displayed at the absorption bands at 1618 cm -1 and 1049 cm -1 correspond to the bond stretching of C=C and C-O groups, respectively (Fan et al 2013). These characteristic absorption peaks were almost consistent for both ZCA/GO and CA.…”