A Brief review on extraction of nanocellulose and its application

Abstract

Cellulose is one of the most abundant renewable natural resources. With the advent of nanotechnology, the interests of cellulose scientists have diverted towards the extraction of nanocellulose from various plant sources and utilize them in technical applications. The reason behind the rapid progress in the nanocellulose chemistry and engineering lies in the promising properties of the nanocellulose and the products thereof. In fact, nanocelluloses combine the important properties of cellulose with amazing features of nanoscale materials. With the perspective of potential of cellulosic materials production in Nepal basically from agricultural wastes and uses in several applications such as in the preparation of biomaterials, this paper reviews the current knowledge in research and development of nanocelluloses in particular for biomedical applications. After the introduction to the chemical constitution and microfibrillar arrangement of nanocellulose in the cellulose bundles together with other constituents, the ways of preparation of nanocellulose and its functionalization approaches will be discussed. Finally, the application of nanocellulose for preparing biomaterials scaffolds will be introduced

The use of bamboo fibres as reinforcements in composites

“…Nanofi bre composites are also used for making fl exible circuits, solar panels and other electronics devices (Giri and Adhikari, 2013 ). This application potentially offers the benefi ts of reduced energy consumption together with more competitive pricing compared with conventional materials (Fan et al ., 2011 ).…”

Perspective of garlic processing wastes as low‐cost substrates for production of high‐added value products: A review

“…The search for new renewable resources for the production of biodegradable and biocompatible materials has steadily increased in recent years [103]. Various agricultural residues generated from agri-food industries have been used to extract cellulose nanofibers, and nanocrystals for the value-added utilization [104,105]. Cellulose microfibers and cellulose nanocrystals were isolated from garlic by-products by alkali treatment and acid hydrolysis [106].…”

Extraction, Preparation and Characterization: Nanocellullose

“…Due to the high pressure, steam penetrates into the cellulose fibers and shear force is generated by sudden pressure release which hydrolyze the glycosidic and hydrogen bonds resulting in the formation of cellulose nanofibers (Giri & Adhikari, 2013: Cherian et al, 2010.…”

“…The amorphous segments can be removed to produce highly crystalline cellulose (Azizi et al, 2005). Cellulose occurs in four major polymeric forms: cellulose I, II, III and IV (Giri & Adhikari 2013). Among them cellulose I is natural cellulose with structures I α and I β .…”