conductive polymer

Click here to load reader

Download Conductive Polymer

Post on 14-Jan-2017

153 views

Category:

Science

0 download

Embed Size (px)

TRANSCRIPT

Shree Manibhai Virani & Smt. Navalben Viani science coollage Accredited at the level A by NAAC, Star collage by MST-DBT A Collage With Potential For Excellence-CPE by UGC Yogidham Gurukul, Kalawad Road Rajkot-360005

Shree Manibhai Virani & Smt. Navalben Virani science collegeAccredited at the level A by NAAC, Star collage by MST-DBTA Collage With Potential For Excellence-CPE by UGCYogidham Gurukul, Kalawad Road Rajkot-360005

INTRODUCTIONConductive polymers or, more precisely, intrinsically conducting polymers (ICPs) are organic polymers that conduct electricity. Such compounds may have metallic conductivity or can be semiconductors. Due to their poor processability, conductive polymers have few large-scale applications. They have promise in antistatic materials and they have been incorporated into commercial displays and batteries.CONDUCTIVE POLYMERSPrepared by: Bhavin K. Vekariya,(B.Sc. Industrial Chemistry, MNVSC)Guided by: Pro. Govind Vagadiya (Dept. of Industrial chemistry, MNVSC)DEPARTMENT OF INDUSTRIAL CHEMISTRYABSTRACT Conductive polymers may have metallic conductivity or can be semiconductors. Conductive polymers are generally not thermoplastics. The conductivity of such polymers is the result of several processes like doping, self doping, oxidation etc. nowadays Conductive polymer is letest concept which is used in many field like Technology, Biomedical, Drug release systems, Energy storage, Molecular electronics, Electrostatic Material, Conductive Adhesive, Printed circuit boards, Artificial nerves, Aircraft structures etc.USES AND APPLICATION Micropatterned bioelectrodes can be made by conductive polymer. conductive polymer can be use to make biosensors. Conductive polymer are very useful to reduce electricity wastage. These can be use in drug delivery devices. it is very useful in making neural electrodes. These polymer are very important in tissue engineering. we can make conductive adhesive which not required any wiring to connect electronics. we can make flexible transparent displays, electromagnetic shielding. Another use is for microwave-absorbent coatings, particularly radar-absorptive coatings on stealth aircraft.Conductive polymer is very useful also in belove fields like, Electrostatic materials, Molecular electronics , Conducting adhesives, Electrical displays , Artificial nerves, Drug release systems, Aircraft structures, etc.ADVANTAGES The polymers are used because of either their light weight, biological compatibility. Conductive polymer increase speed and reduce power consumption, junctions and connecting lines are finer and closer together. flexible transparent displays. Some electrical properties can be fine-tuned using the methods of organic synthesis and by advanced dispersion techniques. With the availability of stable and reproducible dispersions, PEDOT(poly(3,4 ethylenedioxythiophene)) and polyaniline.

DISADVANTAGES There have had limitations due to, the manufacturing costs is very high ,material cost of conductive polymer is high material of conductive polymer material may be become toxic after process. conductive polymers have poor solubility in solvents, conductive polymer have inability to directly melt process. if we make a integrated circuits by conductive polymer than the resulting integrated circuits are more sensitive and can be easily damaged by static discharge at a very low voltage. PREPARATION OF CONDUCTIVE POLYMERS Conductive polymers are prepared by many methods. Most conductive polymers are prepared by oxidative coupling of monocyclic precursors. Such reactions entail dehydrogenation. n H[X]H H[X]nH + 2(n1) H+ + 2(n1) e The low solubility of most polymers presents challenges. Some researchers have addressed this through the formation of nanostructures and surfactant-stabilized conducting polymer dispersions in water. These include polyaniline nanofibers and PEDOT:PSS. These materials have lower molecular weights than that of some materials previously explored in the literature. However, in some cases, the molecular weight need not be high to achieve the desired properties.

.CURRENT VISIBILITY Most recent emphasis is on organic light emitting diodes and organic polymer solar cells. The Organic Electronics Association is an international platform to promote applications of organic semiconductors. Conductive polymer products with embedded and improved electromagnetic interference (EMI) and electrostatic discharge (ESD) protection have led to both prototypes and products. For example, Polymer Electronics Research Center at University of Auckland is developing a range of novel DNA sensor technologies based on conducting polymers, photoluminescent polymers and inorganic nanocrystals (quantum dots) for simple, rapid and sensitive gene detection. Typical conductive polymers must be "doped" to produce high conductivity. As of 2001, there remains to be discovered an organic polymer that is intrinsically electrically conducting.FUTURE ASPECTSIf we can produce conductive polymer at very low cost then we can reduce electrical energy wastage during energy transportation. the increased conductivity of modern conductive polymers means enough power can be put through the device at low voltages to generate practical amounts of light. This property has led to the development of flat panel displays using organic LEDs, solar panels, and optical amplifiers. Due to the biocompatability of some conducting polymers they may be used to transport small electrical signals through the body, i.e. act as artificial nerves. Perhaps modifications to the brain might eventually be contemplated.By coating aircraft with a conducting polymer the electricity can be directed away from the vulnerable internals of the aircraft. To make programmable floors for robotics and AGV's.

1