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Microencapsulation
Microencapsulation involves enclosing solids, liquids, or gases in a shell to form small capsules measuring 1 to 999 μm. It is used in smart textiles to control the release of encapsulated materials like scents, medicines, or electronics. There are three main reasons for microencapsulation: to avoid direct interaction with the environment, release contents all at once, or slowly over time. Microencapsulation allows textiles to have functions like delivering fragrances, monitoring health, or adding electronics. Some examples include aromatic clothes that release scents, medical garments with moisturizers, and sportswear that tracks activity. The technology is also used in home items, clothing with lights, and interactive garments that
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Microencapsulation
- 1. MICROENCAPSULATION & ITS ROLEIN SMART TEXTILES A review by Mary Ryan
- 2. DEFINITION • Encapsulation isthe process in which capsules are applied to yarn or fabric surface.
- 3. • Latin “encapsula” meaningin a little box • Examples from nature, • egg in a shell • seed in a coat • cell in a cell membrane
- 4. Microencapsulation • Encapsules ofparticles between 1 to 999 µm(10-6 to 10-3 meters) • ie nanometers (nm) to millimeters(mm)
- 5. Why is itneeded? • It is used to change the direct interaction of the encapsulated material with its environment depending on the time. 3 distinct modes of interaction with the environment depends on i. Choice of the material of the shell ii. Structure of the capsule iii. Material encapsulated
- 6. 3 different reasonsfor microencapsulation 1. To avoid direct interaction with the environment altogether 2. To release the contents of the capsule all at once 3. Or slowly over time
- 7. What drives technologytowards microcapsules & nanocapsules? Capsule size Control of the encapsulated material
- 8. Microcapsules • Spherical polymeric particles •Size 1 to 999 µm • 50nm to 10mm(non technically)
- 9. Microspheres • Microspheres and Microcapsulesare used interchangeably • Microspheres are hollow/homogeneous solid polymeric particles
- 10. Types of microcapsules •Mononuclear • Polynuclear • Monolithic is a matrix composed of encapsulated and encapsulating phases
- 11. Uses of MicroscopicCapsules • They can be made to contain beneficial substances(oils, vitamins,antiseptics,arom atic chemicals, moisturisers and antibacterial chemicals) • They are released gradually through abrasion when in direct contact with skin.
- 12. • AROMATIC textiles, •T-shirt with gives aroma when the screenprinted image surface of the product is gives a smell like rubbed. chocolate • Underwears are infused • The effect lasts for with fruity some time and it is smells,calming lavender washed normally and moisturizing oils • Masculine scents for men like musk and sandalwood
- 13. Medical Industry • Antisepticcapsulated products like wound dressings and bandages • Medical and hospital garments are made moisture absorbent • For children with sensitive skin the vests are infused with moisturisers and oils • A tiny camera is placed on paramedic’s headwear gives visual information to the hospital and the doctor to send immediate treatment.
- 14. SPORTSWEAR • Socks andsports clothing to repel odour and fungal infection • Used widely in sportswear to record activities, monitor progress, analyse performance in motorbiking, racing and space suits • Swimwear is encapsulated with sunblock to prevent sunburn
- 15. Home Textiles &Entertainment Industry • Bed Linen is encapsulated to aid relaxation and rest. • Lavender and camomile gives off a soothing aroma • Club wearers garments are encapsulated so that they light up when they move fast.
- 16. Electronic Textiles • INTERACTIVEtextiles are built in such a way that computers and electronic technology are able to communicate and work with us. • 10% of conductive thread(conductive fibres like Carbon, silver &steel)is used to make the product
- 17. Brands dealing withElectronic Textiles • Levi’s and Philips jointly launched a ICD+ jacket where phone calls can be made and can listen to music with headphones • The control panels are built into the jacket • Children’s clothing are integrated with camera, so that it can be tracked by parents.
- 18. Reference • http://fibretronic.com/ news/Wearables%20Re view • Books: Smart Textile Coating and Laminates, • Textiles Technology
- 19.