Facile synthesis of chitin nanocrystals decorated on 3D cellulose aerogels as a new multi-functional material for waste water treatment with enhanced anti-bacterial and anti-oxidant properties

Abstract

We report the fabrication and application of multi-functional hybrid bio-aerogels based on cellulose nanofibers (CNFs) and chitin nanocrystals (CNCs).

Cellulose Nanofiber vs Nanocrystals From Pineapple Leaf Fiber: A Comparative Studies on Reinforcing Efficiency on Starch Nanocomposites

“…Nanocellulose is one of the most reliable material for improving the properties of starch such as mechanical, water sorption, moisture sorption due to its high aspect ratio, less weight, and biodegradability . Cellulose nanomaterial were typically isolated from lignocellulosic plants like sisal, hemp, jute, bamboo, pineapple leaf etc by a series of physical and chemical pre‐treatments.…”

Development and Modification of Cellulose Acetate/Carboxy Methyl Cellulose Blend Films for Enhanced Adsorption of Methylene Blue

“…The residual concentrations of methylene blue determined at the absorbance maxima λ max = 609 nm. The percentage of removal of methylene blue with different adsorbents was calculated by the following Equation where C i (mg L −1 ) is the initial concentration of solution and C 0 (mg L −1 ) is the final concentration.…”

“… where C i (mg L −1 ) is the initial concentration of solution and C 0 (mg L −1 ) is the final concentration. The following Equation was used for calculating the dye adsorption capacity of the adsorbents; here q e is expressed as (mg g −1 ), V is the volume of solution, and m is the mass of adsorbent.…”

Waste-to-wealth: biowaste valorization into valuable bio(nano)materials

“…One such example is the synthesis of multi-functional hybrid bio-aerogels based on cellulose nanofibers (CNFs) decorated with chitin nanocrystals (CNCs). 72 Once CNFs and CNCs were extracted from corn husks and shrimp shells, respectively, an environmentally friendly freeze-drying process was devised during which a mixture comprised of an aqueous solution of CNFs with dispersed CNCs was first frozen at -73 °C in a dry ice-isopropanol and then freeze dried in a lyophilizer at -88 °C under vacuum for 4 days. Figure 7a shows FESEM images of three CNFs aerogels with different amounts of CNCs (0, 1, and 2 % referred to as neat AR, AR1 and AR2, respectively).…”

“…a) left: FESEM images of different aerogel; b) right: mechanism for adsorption of dyes (MB and Rh6G) into AR2 Reprinted with permission from ref 72. …”