METHOD OF PREPARATION OF A MWCNT/ POLYMER COMPOSITE HAVING ELECTROMAGNETIC INTERFERENCE SHIELDING EFFECTIVENESS
First Claim
1. A method of preparing carbon nanotube/polymer composite having electromagnetic interference (EMI) shielding effectiveness, which comprises the following steps:
- a) preparing a polymer solution containing 0.5-10 wt % of carbon nanotubes dispersed therein, based on the weight of the polymer; and
b) coating the polymer solution containing carbon nanotubes dispersed therein on a substrate and drying the resulting layer coated on the substrate;
c) stacking a plurality of the substrates prepared from step b), each of which has the dried layer,wherein said preparing in step a) comprises dissolving a polymer in an organic solvent and dispersing carbon nanotubes in the resulting polymer solution to form said polymer solution containing carbon nanotubes dispersed therein.
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Abstract
A method of preparing carbon nanotube/polymer composite having electromagnetic interference (EMI) shielding effectiveness is disclosed, which includes: dispersing multi-walled carbon nanotubes (MWCNT) in an organic solvent such as N,N-Dimethylacetamide (DMAc); dissolving monomers such as methyl methacrylate (MMA) and an initiator such as 2,2-azobisisobutyronitrile (AIBN) in the MWCNT dispersion; and polymerizing the monomers in the resulting mixture at an elevated temperature such as 120° C. to form a MWCNT/PMMA composite. The composite is coated onto a PET film, and the coated PET film alone or a stack of multiple coated PET films can be applied as an EMI shielding material.
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19 Claims
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1. A method of preparing carbon nanotube/polymer composite having electromagnetic interference (EMI) shielding effectiveness, which comprises the following steps:
- a) preparing a polymer solution containing 0.5-10 wt % of carbon nanotubes dispersed therein, based on the weight of the polymer; and
b) coating the polymer solution containing carbon nanotubes dispersed therein on a substrate and drying the resulting layer coated on the substrate;
c) stacking a plurality of the substrates prepared from step b), each of which has the dried layer,wherein said preparing in step a) comprises dissolving a polymer in an organic solvent and dispersing carbon nanotubes in the resulting polymer solution to form said polymer solution containing carbon nanotubes dispersed therein. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- a) preparing a polymer solution containing 0.5-10 wt % of carbon nanotubes dispersed therein, based on the weight of the polymer; and
Specification