Preparation of Dicarboxyl Cellulose Nanocrystals from Agricultural Wastes by Sequential Periodate-Chlorite Oxidation

Nanocellulose by Ammonium Persulfate Oxidation: An Alternative to TEMPO-Mediated Oxidation

“…The development of carboxylic acid content approaches an asymptotic limit at approximately 1.5 mmol/g after 10 h of oxidation. This is close to the theoretical maximum of 1.71 mmol/g using the 110 and (110) plane dimensions reported by Nishiyama for the unit cell and the average length and diameter for the nanofibers produced in this investigation. − …”

Fluorescent labeling and characterization of dicarboxylic cellulose nanocrystals prepared by sequential periodate–chlorite oxidation

“…The dicarboxylic CNC was prepared using a previously reported method. 36 First, 4 g MCC, 5.33 g NaIO 4 , 15.6 g NaCl, and 266 mL H 2 O were placed in a 500 mL beaker, placed on a magnetic stirrer, and kept stirring for 24 h in the dark at room temperature. In sequence, 10 mL of ethylene glycol was added to the beaker, stirring was maintained for 30 min, and the reaction was ended.…”

“…16 The nanocellulose prepared by TEMPO-mediated oxidation has carboxyl groups on the surface, but the content of carboxyl groups is lower, and the uorescence intensity is lower aer graing uorophores. The dicarboxylic CNC prepared by the periodate sequential oxidation method has a higher carboxyl concentration on the surface, 36,37 and a better uorescence performance is expected by graing uorophores. To the best of our knowledge, there is no related research on the uorescent functional modication of dicarboxylic CNC prepared by sequential periodate-chlorite oxidation.…”

Ferric ion detection mechanism of a dicarboxylic cellulose nanocrystal and a 7-amino-4-methylcoumarin based fluorescent chemosensor

“…Also, the content of carboxyl groups on dicarboxylic cellulose nanocrystals (DCN) prepared by sequential periodate–chlorite oxidation is higher than that of cellulose nanofibrils prepared by TEMPO-mediated oxidation. 18 Furthermore, the high carboxyl group content results in better dispersibility in water and easy chemical modification. Fluorescent dicarboxylic cellulose nanocrystals (FDCN) were prepared by attaching 7-amino-4-methylcoumarin (AMC) to DCN prepared by sequential periodate–chlorite oxidation under 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMTMM) catalysis.…”

“…Among numerous materials, nanocellulose is an attractive material for synthesizing uorescent probes due to its carbon neutrality, 16 low cytotoxicity, 17 good biocompatibility, and availability in a vast source of raw materials. 18 Various studies have proven nanocellulose as a suitable matrix material for the synthesis of uorescent probes. [19][20][21][22] For instance, the immobilization of uorescent dyes on nanocellulose has been demonstrated to improve the performance of uorescent probes.…”