Effects of natural zeolite and ferric oxide to electromagnetic and reflection loss properties of polyurethane nanocomposite

Innovation in Polymer Science and Technology 2016

材料科学;化学

Gultom, G.^1,2 ; Wirjosentono, B.^3 ; Ginting, M.^4 ; Sebayang, K.^5

Polytechnic of Chemical Industry Technology, Medan, Indonesia^1

Physics Post Graduate Department, University of Sumatera Utara, Medan, Indonesia^2

Chemistry Department, University of Sumatera Utara, Medan, Indonesia^3

Research Center for Physics, Indonesian Institute of Science, Serpong, Indonesia^4

Physics Department, University of Sumatera Utara, Medan, Indonesia^5

关键词: Complex permeability;    Complex permittivity;    Electromagnetic properties;    Particle size analyzers;    Polymeric composite materials;    Polyurethane nanocomposites;    Toluene diisocyanates;    Vector network analyzers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/223/1/012031/pdf
DOI  :  10.1088/1757-899X/223/1/012031

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Microwave-absorptive polymeric composite materials are becoming important to protect interference of any communication systems due to increasing use of microwave-inducing devices. In this work, the microwave-absorptive polyurethane nanocomposites were prepared using natural zeolites of Sarulla North Sumatra and commercial ferric oxide as fillers. Weight ratios of the polyurethane to natural zeolite and ferric oxide were varied (90%:6%:4%; 80%:12%:8%; 70%:24%:6%) by weight. The fillers were prepared using ball milling technique and characterized for their particle size distributions using Particle Size Analyzer. The nanocomposites, prepared using in-situ reaction of polyethylene glycol, toluene diisocyanate and fillers. The complex permittivity ('and ") and complex permeability (μ' and μ") as electromagnetic properties were calculated using NRW method after collecting real and imaginary S parameter using Vector Network Analyzer measurement at X band frequency. Results show ratio of the fillers will affect the permeability, permittivity and reflection loss of the materials. The best reflection loss was shown -40.588 dB (>99 % absorption) at ratio for polyurethane : nanozeolite : ferric oxide (80%:12%:8%) by weight observed at 10.92 GHz. According to the measurement and calculation was shown the polyurethane filled with natural nanozeolite and ferric oxide is a good electromagnetic wave attenuation material.