Isolation, modification and characterisation of cellulose from wild Dioscorea bulbifera

Abstract

This study attempted to valorise wild Dioscorea bulbifera yam presently known to be poisonous and inedible obtained from three sources. The functional properties as well as its chemical composition were determined and isolated. Isolated cellulose was modified by the actions of sodium hydroxide and maleic anhydride. The biomass, isolated products and modified cellulose were characterized. Results showed that the highest cellulose obtained was 82.6%. FT-IR results showed successful modification of cellulose with the presence of a carbonyl (C = O) adsorption band at around 1725 cm-1. SEM images and XRD data showed a clear decrease in crystallinity but a slight increase in crystallite size after modification of the mercerized cellulose. TGA results showed the polymers degraded between 284 and 414 °C. The study reveals that the modified cellulose has potential application as an adsorbent and industrial material.

Design and Fabrication of Anticancer Drug‐Loaded Poly(ϵ‐caprolactone)‐Poly(ethylene glycol)‐Poly(ϵ‐caprolactone) Micelles as Controlled Release System

“…Similarly, a weak peak at 1470 cm −1 may be due to −CH 2 bending vibration. The strong peak at 1725 cm −1 was due to carbonyl (C=O) adsorption [15] . In this study, these peak values were observed as 1471 and 1725 cm −1 , respectively.…”

“…The strong peak at 1725 cm À 1 was due to carbonyl (C=O) adsorption. [15] In this study, these peak values were observed as 1471 and 1725 cm À 1 , respectively. It was stated that the FT-IR spectrum of DOX exhibited multiple peaks at 3346, 2940, 2354 and 1072 cm À 1 , which corresponded to the different quinine and ketone carbonyls in DOX.…”

Bionanocellulose/Poly(Vinyl Alcohol) Composites Produced by In-Situ Method and Ex-Situ/Impregnation or Sterilization Methods

“…X-ray diffraction measurements were made using the X’Pert PRO system, applying nickel filtered CuKα radiation (wavelength 1.54056 Å) in the 2θ angle range from 2° to 40°. The degree of crystallinity (X c , %) was calculated as the ratio of the surface area of signals corresponding to the crystalline phase to the total surface area under the XRD pattern [ 40 , 41 ]: where A cr is the surface area under crystalline peaks, and A am is the area of amorphous halo.…”

Cellulose nanocrystals from Siam weed: Synthesis and physicochemical characterization

“…Both ethanol and cyclohexane are greener solvents compared to benzene which is carcinogenic. A previous study showed that extractive yield by ethanol-cyclohexane mixture is close to that obtained when ethanol-benzene mixture is used [ 25 ]. Initial attempt showed that the two solvents (ethanol-cyclohexane mixture and ethanol) gave the same yield of 4.2% extractives.…”

“…Recent efforts geared towards obtaining cellulose focus on abundant agricultural wastes in the environment. Isolation of cellulose and CNC from the following agricultural wastes has been reported: rice straw [ 20 ], coconut shell [ 16 ], ground nut shell [ 21 ], walnut shell [ 22 ], jackfruit peel [ 23 ], corn straw [ 24 ], aerial yam [ 25 ], bamboo [ 26 ] and sisal [ 27 ].…”