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SELF-HEALING POLYMER TECHNOLGY
SUBMITTED BY:
Kruti Dipan PattanaikKMBB College Of Engineering & Technology.
GUIDED BY:
Ms. Suparna Nayak
Outline• Introduction• Classification
• Healing Mechanism• Benefits• Challenges• Application• Conclusion
– Intrinsic Self-healing– Extrinsic Self-healing
Introduction
– Tremendous engineering application of polymers– Long-term durability and reliability are still
problematic– Damage at microscopic level is difficult to
perceive or cure– Self-healing in animals and plants– Work in progress to integrate self-healing
capability into polymers
Classification
• Intrinsic Self-Healing– Polymer have ability to heal crack by themselves
• Extrinsic Self-Healing– Healing agent have to be pre-embedded
Intrinsic Self-Healing
– Specific performance of polymer matrices enables self-healing under certain simulation
– Simulation may be of heat, light, mechanical forces etc.
– Autonomic healing is not developed for the time being
*Based on physical interaction
*Based on chemical interaction
Intrinsic Self-Healing
Extrinsic Self-Healing
– Matrix resin itself is not healable one– Healing agent has to encapsulated and
embedded in the material– During crack growth, it destroy fragile capsule– Healing agent rises in crack due to capillary effect
and heal the crack
•Based on healant loaded pipeline→ Hollow glass tubes and glass fibers
Extrinsic Self-Healing
Figure 2. Schematic diagram of repair concept using pre-embedded hollow tubes [1]
•Based on healant loaded pipeline→ Three-dimensional microvascular networks
Extrinsic Self-Healing
Figure 3. Schematic diagram of repair concept using 3D network
•Based on healant microcapsules→ Three-dimensional microvascular networks
Extrinsic Self-Healing
Figure 4. Schematic drawing of the principle of self-healing epoxy based microcapsules[2]
Healing Mechanism•Paint
New scratches One week later
Figure 5. Car painted with “Scratch Guard Coat”[3]
Benefits
– Improving product safety and reliability and to extend product lifetimes.
– Improved toughness– Reduced waste disposal– Building sustainable society
Challenges
– Cost of manufacturing of such material– Storage of healing agent inside the material for a
long period of time– Initiation of healing– Healing agent should strongly bound with material
and be stable
Application
– Transportation– Military– Medical dental/artificial body replacements– Electronics– Paints, Coatings, and Adhesives– Civil construction– Sporting Goods
Conclusion
– Achievements in field of self-healing polymer are far from satisfactory
– It provide wide range of opportunity for future development of polymeric material
– For the moment extrinsic self-healing technique is easier for large scale usage
– For long term view, synthesis of new polymer accompanied by intrinsic self-healing and automatic trigger would be reasonable solution
Queries?????
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