(IN2011DE01793) 1. Electromagnetic interference (EMI) shielding material comprising Carbon Nanotubes (CNT) and polymer in the ratio ranging between 5:95 to 50:50 having density in the range of 1.2 to 1.3 g/cc, flexural strength is in the range of 58-97 MPa, flexural modulus is in the range of 3224-9886 MPa and EMI shielding effectiveness (SE) value in the range of 13 to 105 dB. 2. A process for the preparation of electromagnetic interference (EMI) shielding material as claimed in claim 1, wherein said process comprising the steps of: i. dissolving 10 to 20% (w/v) polymer in solvent to obtain a solution; ii. dispersing 0.2 to 0.3 %(w/v) CNT in solvent or in the solution as obtained in step (i) by ultrasonication followed by magnetic stirring for period in the range of 22 to 26 h followed by filtering to obtain a film of dispersed CNTs or resin-impregnated dispersed CNTs respectively; iii. impregnating film of dispersed CNTs as obtained in step (ii) with solution as obtained in step (i) to obtain resin-impregnated dispersed CNTs; iv. drying the resin-impregnated dispersed CNTs as obtained in step (ii) and (iii) at temperature in the range of 40 to 70.deg.C followed by cutting to obtain resin impregnated strips; v. stacking resin impregnated strips as obtained in step (iv) at temperature in the range of 70 to 100.deg.C and a pressure in the range of 10 to 100 kg/cm2; vi. curing the stacked layers as obtained in step (v) at temperature in the range of 140 to 160.deg.C for period in the range of 2 to 4hr to obtain light weight CNT-reinforced polymer composite as electromagnetic interference (EMI) shielding material. 3. A process as claimed in step (i) of claim 2, wherein the polymer are selected from thermoplastic resin or thermosetting resin. 4. A process as claimed in claim 3, wherein the thermoplastic resin are selected from the group consisting of polystyrene, polycarbonate, polyurethane, acrylics, polymethyl methacrylate, polyvinylchloride. 5. A process as claimed in claim 3, wherein the thermosetting resin are selected from the group consisting of epoxy resins, phenol-formaldehyde resins or polyesters. 6. A process as claimed in step (i) and step (ii) of claim 2, wherein the solvent are selected from the group consisting of toluene, acetone, chloroform, N-methyl pyrrolidone or ethanol or combination thereof. 7. A process as claimed in step (ii) of claim 2, wherein the CNTs are selected from multi-walled carbon nanotubes (MWCNT), single-walled carbon nanotubes (SWCNTs) or combination thereof. 8. A process as claimed in step (ii) of claim 2, wherein CNTs are selected from CVD (Chemical Vapor Deposition) based, arc discharged based or HiPCo (High Pressure Carbon Monoxide) based CNTs. preferably CVD based. 9. A process as claimed in claim 2, wherein CNTs obtained in step (ii) and step (iii) is in the form of a bucky paper. 10. A process as claimed in step (ii) of claim 3, wherein filtration is carried out using filtration unit comprises top coupler, filter paper, metallic sieve, bottom coupler, rubber cork, vacuum port and conical vacuum flask.
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