Smart Materials And It's Uses

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Slide 1: 

COIMBATORE INSTITUTE OF TECHNOLOGY (AN AUTONOMOUS INSTITUTION AFFILIATED TO ANNA UNIVERSITY) PAPER PRESENTATION ON: SMART MATERIALS AND ITS USES

SMART MATERIALS AND ITS USES : 

SMART MATERIALS AND ITS USES

DEFINITION: : 

DEFINITION: Smart materials are materials that have more properties that can be significantly changed by external stimuli such as stress, temperature pH, electric or magnetic fields.

EXAMPLES OF SMART MATERIALS: : 

EXAMPLES OF SMART MATERIALS: v     Shape Memory Alloys v     Piezoelectric materials v     Electro- rheostatic materials v     Magneto- rheostatic materials, v     Smart Gels v     Optical Fibres v     pH sensitive polimers v     temperature-responsive polymer

SHAPE MEMORY ALLOYS: : 

SHAPE MEMORY ALLOYS: - Shape-Memory Alloys are metals that at a certain temperature revert back to their original shape.

PIEZOELECTRIC MATERIALS: : 

PIEZOELECTRIC MATERIALS: - when electrical current is passed, piezoelectric material increases in size up to a 4%. - the airbag sensor is an example of piezoelectric material

ELECTRO-RHEOSTATIC AND MAGNETO-RHEOSTATIC: : 

ELECTRO-RHEOSTATIC AND MAGNETO-RHEOSTATIC: - when it exposed to magnetic or electric substance it change from thick fluid into solid substance. - MR fluids experience a change in viscosity. - ER fluids can be as simple as milk chocolate or cornstarch and oil.

LYCRA: : 

LYCRA: - It is a stretchy artificial fibre. - stretchy section make the cloth soft. - rigid section make the cloth tougher than rubber.

USES OF LYCRA: : 

USES OF LYCRA: - make sports clothing such as wetsuits. - it is lightweight. - doesn’t get damaged by sunlight, detergent.

THINSULATE: : 

THINSULATE: - Thinsulate fibres are thin artificial fibres. - It trap a lot of air and reflect heat. - so clothes containing this material keep you very warm.

pH & TEMPERATURE-SENSITIVE POLYMER: : 

pH & TEMPERATURE-SENSITIVE POLYMER: - pH sensitive polymers are materials which will respond to the changes in the pH of the surrounding medium by varying their dimensions. - A temperature-responsive polymer is a polymer which undergoes a physical change. - use as extraction compounds, surface modifiers, drug delivery, and gene delivery.

WONDERFUL APPLICATIONS OF SMART MATERIALS: : 

WONDERFUL APPLICATIONS OF SMART MATERIALS: -Active Control Inceptors Using Smart Material Motion Control. -Removing toxic pollutants from water. -Advanced liquid crystal displays. -Artificial muscles. -embedded sensors. -to find the stealth airplanes, submarines. -to determine the defects in bridges, buildings.

REMOVING TOXIC POLLUTANTS FROM WATER: : 

REMOVING TOXIC POLLUTANTS FROM WATER: - chlorinated phenols are a common water contaminant. - Smart material zinc oxide could degrade organic.

WORKING OF ZnO: : 

WORKING OF ZnO: - detects the contaminates. - when exposed to UV light, ZnO aids in the breakdown of the contaminates. - ZnO convert the pollutants into harmless byproducts. - ZnO film begins to glow brightly that indicate the job is done.

CONCLUSION: : 

CONCLUSION: These "smart materials" are just starting to emerge from the laboratory, but soon you can expect to find them in everything from laptop computers to concrete bridges.