electromagnetic interference shielding efficiency of carbon nanotube
TRANSCRIPT
ELECTROMAGNETIC INTERFERENCE SHIELDING EFFICIENCY OF CARBON NANOTUBE/ POLYMER COMPOSITE
Authors:
Bautista, Monico Anton P.
Feria, Denice N.
Mendoza, Sean Gilbert
Paras, Marion John
Adviser:
Dr. Fortunato Sevilla III
INTRODUCTION
EMI (definition, effects, significance) A problem of rapid growth in the electronic era. Mainly associated with the effect of current
induced by the electric and magnetic fields produced by the electrical circuit.
Affects the body health and one of the cause of machine malfunction.
A waste of time, source and money. Convenient Solutions
Metals Conductive polymer composites
- through EMI shielding material, interference will be solved.
CONDUCTIVE POLYMER COMPOSITES
Carbon Nanotubes CNTs are thin rolled sheets that is suitable for
EMI shielding. Highly conductive, high mechanical strength in
terms of density, permittivity, dielectric constant and aspect ratio, long life.
Respond to variations of reflection, absorption and multiple reflections.
Percolation property. To improve, need a COATING.
- The study is limited in using a certain polymer and to study the factors to be considered for producing EMI shielding material.
OBJECTIVES
Develop the EMI shielding efficiency of a carbon nanotube (CNT)/ polymer composite. It is to study an EMI shielding material and prepare
the CNT/ polymer composite that prevent the radiation and interference of devices in the industry.
It is to study the efficiency of the polymer composite when act as EMI prevention.
It is to study the shielding mechanisms for EMI together with the polymer to be hybridized with CNTs, and
It is to relate the shielding efficiency with respect to the resistance of the material.
REVIEW OF RELATED LITERATURE
Electromagnetic Interference (EMI) and EMI Shielding Efficiency Effects on commercial, military, and scientific
electronic devices (Eswaraiah, 2010). Pollution to electronic era (Saini, 2009). Conducting plastics and nanomaterials as a
convenient solution to EMI problems (Ping Li, 2010,2012).
Mechanisms to consider for EMI shielding (Saleh, 2009).
Carbon Nanotube (CNT) Highly conductive and flexible for mixing to improve
performance.
Polymer Composites Polyvinyl chloride (PVC) Silicone Sealant Polyaniline (PANI) Polycyanoacrylate (PCA)
In finding the Surface morphology SEM (Scanning Electron Microscope) AFM (Atomic Force Microscopy)
Smooth distribution of particles in the composite
IMAGES
CNT (SWCNT and MWCNT)
Polycyanoacrylate
PVC
Silicone Sealant
Polyaniline
Conducting Polymer with Coatings References
Carbon nanotubes in a polypropylene
matrix
Thomassin, J., Huynen, I., Jerome R.,
Detrembleur C. (2010).
Multi-walled carbon nanotube/
poly(trimethylene terephthalate)
Gupta, A., Choudhary, V.(2011).
Polyvinyl chloride reinforced graphite/
copper nanoparticles
] Al-Ghamdi, A., El-Tantawy, F. (2010).
Carbon nanotubes in polycarbonate
composites
Arjmand, M., Mahmoodi, M., Gelves, G.,
Park, S., Sundararaj, U. (2011).
Carbon nanotube/ poly methyl
methacrylate (PMMA) composites
Yuan-Li, H., Siu-Meng, Y., Chen-Chi,M.,
Chia-Yi, C. et. al.(2009)
Carbon nanotubes/ cement composites Singh, A., Gupta, B., Mishra, M. Chandra,
G., et. Al. (2013).
Carbon nanotube/ polyurethane
composites
Liu, Z., Bai, G., Yi, H., Ma, Y., et.al. (2007).
Carbon nanotube/ polystyrene composites Arjmand, M., Apperley, T., Okoniewski,
M.,Sundaraj, U. (2012).
Carbon nanotube filled with polyacrylate
composite films
Yong, L., Chen, C., Zhang, S., Yuwei, N.,
Huang, J. (2008).
METHODOLOGY Materials
Carbon NanotubesFor the PVC, Polycyanoacrylate, Silicon Sealant:
- Tetrahydrofuran (THF)- PVC, Polycyanoacrylate, Silicon Sealant
For the Polyaniline- Polyaniline- Aqueous solution like Potassium persulfate/
HCl Instruments
Van der Pauw measurement setup Microwave Optics System Faraday Cage
PANI SYNTHESIS (PREPARATION OF COMPOSITES)
Aniline
CNTPotassium
persulfate/ HCl
Polyaniline (PANI) with CNT
Mixed with solvent Add polymer
Polymer with PANI, CNT, THF
composite
Evaporate solvent
Ratios of the composite and CNT will be measured for accurate EMI SE
PREPARATION OF COMPOSITES
PVC/ Polycyanoacrylate/
Silicon Sealant
Tetrahydrofuran (THF)
Mixed polymer and THF
CNT
CNT with composite
composite
Evaporate THF
Ratios of the composite and CNT will be measured for accurate EMI SE
PREPARATION OF COMPOSITES
Polycyanoacrylate/ Silicon Sealant
Solvent
Mixed polymer and solvent
CNT
CNT with composite
composite
Evaporate solvent
Ratios of the composite and CNT will be measured for accurate EMI SE
ELECTRICAL RESISTIVITY
composite Van der Pauw measurement
setup
EMI SE TEST (ENCLOSED IN A FARADAY’S CAGE)AFTER, CALCULATIONS WILL BE MADE
Test Sample
Microwave generator
Microwave receiver
REFERENCES [1] Saini, P., Choudhary V. Singh, B.P. ,et.al. (2009). Polyaniline- MWCNT
nanocomposites for microwave absorption and EMI shielding.National Physics Laboratory. New Delhi, India.
[2] Thomassin, J., Huynen, I., Jerome R., Detrembleur C. (2010). Functionalized polypropylenes as efficient dispersing agents for carbon nanotubes in polypropylene matrix; application to electromagnetic interference (EMI) absorber materials. Belgium.
[3] Gupta, A., Choudhary, V.(2011). Electromagnetic interference shielding behavior of poly(trimethylene terephthalate)/ multiwalled carbon nanotube composites. New Delhi, India.
[4] Al- Saleh, M., Sundararaj, U. (2009).Electromagnetic interference shielding mechanisms of CNT/ polymer composites. University of Alberta, Canada.
[5] Liu, Z., Bai, G., Yi, H., Ma, Y., et.al. (2007). Reflection and absorption contributions to the electromagnetic interference shielding of single-walled carbon nanotube/polyurethane composites.National University, Tianjin, China.
[6] Singh, A., Gupta, B., Mishra, M. Chandra, G., et. Al. (2013).Multiwalled carbon nanotube/ cement composites with exceptional electromagnetic interference shielding properties. New Delhi, India.
REFERENCES [7] Arjmand, M., Apperley, T., Okoniewski, M.,Sundaraj, U. (2012). Comparative
study of electromagnetic interference shielding properties of injection molded versus compression molded multi-walled carbon nanotube/ polystyrene composites. University of Calgary, Canada.
[8] Wern- Shiarng, J., Huy-Zu, C., Chih- Feng, H. (2007).The electromagnetic shielding effectiveness of carbon nanotubes polymer composites. Taiwan.
[9] Yuan-Li, H., Siu-Meng, Y., Chen-Chi,M., Chia-Yi, C. et. al.(2009). Morphological, electrical, electromagnetic interference (EMI) shielding, and tribological properties of functionalized multi-walled carbon nanotube/ poly methyl methacrylate (PMMA) composites. Taiwan.
[10] Arjmand, M., Mahmoodi, M., Gelves, G., Park, S., Sundararaj, U. (2011). Electrical and electromagnetic interference shielding properties of flow-induced oriented carbon nanotubes in polycarbonate. University of Calgary, Canada.
[11] Bingqing, Y., Liming, Y., Leimei, S., Kang, A., Xinluo, Z. (2012). Comparison of electromagnetic interference shielding properties between single-wall carbon nanotube and grapheme sheet/ polyaniline composites. China.
[12] Al-Ghamdi, A., El-Tantawy, F. (2010). New electromagnetic wave shielding effectiveness at microwave frequency of polyvinyl chloride reinforced graphite/ copper nanoparticles.
[13] Thomassin, J. et.al.(2007) Multiwalled carbon nanotube of poly( E-caprolactone) nancomposites with exceptional EMI shielding properties.