Study of the feasibility of a natural dye on cellulosic textile supports by red padouk (Pterocarpus soyauxii) and yellow movingui (Distemonanthus benthamianus) extracts

Extraction, isolation and characterization of cellulose nanocrystals obtained from Ayous sawdust

“…Similarly, for the extractible content the results observed are almost identical to Saha Tchinda's work, carried out in 2015 on Ayous wood whose extractible content was 0.7% obtained by soxhlet extraction with dichloromethane solvent and 0.8% with ethanol/toluene solvent mixture [9] . These results are consistent with the laboratory results for the Ayous sawdust sample to study in this work.…”

“…It dries quickly when exposed to the open air [13] . Humidity rate roughly equal to the result observed by Saha Tchinda et al [9] , on Ayous whose humidity was 12%.…”

“…Ayous, of scientific name Triplochiton scleroxylon and represents 37.2 % of the exploitation, is the essence of the most exploited wood. Its transformation, generates nearly 92 million m 3 of residues [9] .Wood is a composite material of a very heterogeneous, porous and highly hygroscopic character, whose natural fibres consist mainly of cellulose, hemicelluloses and lignin [10][11] . However, even if these fibres have little interest in being used as reinforcements in composites, the elements of the components can still be exploited.…”

“…The crystalline parts called cellulose nanocrystals (CNC), are the smaller sizes structural elements in the plant fibres. Their extraction could thus be an effective solution for the valorization of plant waste [5][6][7][8][9][10][11][12] .This work will aim to extract microcrystalline cellulose from sawdust, isolate cellulose nanocrystals and carry out a characterization of the Ayous fiber and the different extracts.…”

Ultrasonic assisted sustainable dyeing of mordanted silk fabric using arjun (Terminalia arjuna) bark extracts

“…Synthetic dyes are greatly used in textile industry for dyeing of textile material because of their vast range of colors, shades, high fastness properties, and low prices . However, synthetic dyes also produce some allergic, toxic and carcinogenic byproducts due to which they are widely criticized all over the word by consumers, traders, and researchers. The decline in frequent use of such products is due to the awareness spread by the environmental associations to impose restrictions on their use .…”