• PRESENTED BY -

SUMIT CHOUDHARY

“green-tribology”

A SEMINAR

PRESENTATION ON

PRINCIPLES OF GREEN-TRIBOLOGY

• Minimum of heat & energy dissipation• Minimum of wear• Self-lubrication• Bio-degradable lubrication• Using sustainable engineering principles• surface texturing• environmental implications of coatings• real-time monitoring • design for degradation• sustainable energy applications• Bio-mimetic approaches

AREAS OF GREEN-TRIBOLOGY

Environment-friendly

lubrication

The tribology of renewable energy

application.

Biomimetics for tribologicalapplications

Biomimetic Surfaces

• application of biological methods and systems found in nature to the study and design of engineering systems and modern technology.

• 1. The lotus effect based non-adhesive surfaces.

The Gecko effect

• Complex hierarchical structure of gecko feet

surface.

reversible adhesion…

shark-skin effect

• Biofouling and biofilming

• Conventional antifouling coatings for ship hulls are often toxic and environmentally hazardous

• Oleophobic surfaces capable of repelling organic liquids

• Microstructured surfaces for various optical applications

Microtextured surfaces for de-icing and anti-icing

• Anti-icing is accomplished by applying a protective layer of a viscous anti-ice fluid

• water repellent surface can also have de-icing properties

• propylene glycol or ethylene glycol, can be toxic

Composite and nanocompositematerials

• self-cleaning, self-lubrication,

and self-healing

• Metal-matrix composites, and polymeric composites as well as ceramics (including concrete) have been recently used for this purpose.

Biodegradable Lubrication, Coatings, and Materials

• The use of natural biodegradable lubricants

• Chemical modification of vegetable oils and/or the use of antioxidants

• Ionic liquids for green molecular lubrication.

• Powder lubricants and,in particular, boric acid lubricants

Renewable Energy

• The tribology of renewable sources of energy is a relatively new field of tribology.

• environmentally friendly energy production.

• Can be used in Wind power turbines, Tidal power turbines, Geothermal energy plants.