Cellulose Nanofiber / Nanocellulose

G. M. AhshanuzzamanStudent Id : 1105154th Year 1st TermForestry and Wood Technology DisciplineKhulna UniversityKhulna

Cellulose Nanofiber(CNF) is made from wood-derived fiber (pulp) that has been micro-refined to the nano level of several hundredths of a micron and smaller. As the material is derived from plant fibers,

Cellulose Nanofiber

Cellulose nanofiber is the world's most advanced biomass material. It creates low environmental impact in its production and disposal

Relationship between trees and cellulose Nanofiber

Trees are composed of wood fibers, which in turn are made of cellulose nanofibers, aggregations of cellulose molecules.

Light and strong

Ultra-fine fibers (fiber width: about 3 nm)

Large specific surface area

Low thermal expansion

High gas barrier properties

Environmentally-friendly biomass material

Renewable resource and broad availability

Low density and high strength compared

with inorganic fillers

Characteristics of Nanofiber Composite

Properties of Nanofiber CompositeNanocellulose dimensions and crystallinity

They consist cellulose nanofibrils and nanofibril bundles. Typical values for the degree of crystallinity around 63%.

Viscosity

The high viscosity at low nanocellulose concentrations makes nanocellulose very interesting as a non-caloric stabilizer and gellant in food applications,

Barrier properties

In semi-crystalline polymers, the crystalline regions are considered to be gas impermeable. Due to relatively high crystallinity (high cohesive energy density) it has been suggested that nanocellulose might act as a barrier material.

The modulus of elasticity has the same level of strength as that of

aramid fiber, which is known as a high-strength fiber,

Thermal expansion on par with glass.

Its tensile strength is about 500MPa

Its stiffness is about 140–220 Gpa

Films made from nanocellulose have high strength (over 200 MPa),

High stiffness (around 20 GPa) and high strain

Its strength/weight ratio is 8 times that of stainless steel.

Mechanical Properties

Applications of Nanofibers and Nanocomposites Paper and paperboard

Composite

Regenerated cellulose products, such as fibers films, cellulose derivatives

Tobacco filter additive

Organometallic modified nanocellulose in battery separators

Reinforcement of conductive materials

Loud-speaker membranes

High-flux membranes

Flexible electronic displays

Computer components

Lightweight body armour and ballistic glass

Future Inventions of Nanocomposite

Cars Transparent Cell-Phone Transparent LED-TV Transparent Watch Transparent Valuable

Ornaments Transparent panel Products Transparent hard-wares for

Computer