tailieunhanh - Báo cáo hóa học: " Inorganic nanotubes reinforced polyvinylidene fluoride composites as low-cost electromagnetic interference shielding materials"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Inorganic nanotubes reinforced polyvinylidene fluoride composites as low-cost electromagnetic interference shielding materials | Eswaraiah et al. Nanoscale Research Letters 2011 6 137 http content 6 1 137 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Inorganic nanotubes reinforced polyvinylidene fluoride composites as low-cost electromagnetic interference shielding materials Varrla Eswaraiah1 2 Venkataraman Sankaranarayanan2 Sundara Ramaprabhu1 Abstract Novel polymer nanocomposites comprising of MnO2 nanotubes MNTs functionalized multiwalled carbon nanotubes f-MWCNTs and polyvinylidene fluoride PVDF were synthesized. Homogeneous distribution of f-MWCNTs and MNTs in PVDF matrix were confirmed by field emission scanning electron microscopy. Electrical conductivity measurements were performed on these polymer composites using four probe technique. The addition of 2 wt. of MNTs 2 wt. f-MWCNTs to PVDF matrix results in an increase in the electrical conductivity from 10-16S m to X 10-5S m X 10-1S m . Electromagnetic interference shielding effectiveness EMI SE was measured with vector network analyzer using waveguide sample holder in X-band frequency range. EMI SE of approximately 20 dB has been obtained with the addition of 5 wt. MNTs-1 wt. f-MWCNTs to PVDF in comparison with EMI SE of approximately 18 dB for 7 wt. of f-MWCNTs indicating the potential use of the present MNT f-MWCNT PVDF composite as low-cost EMI shielding materials in X-band region. Introduction In recent years electronics field has diversified in telecommunication systems cellular phones high-speed communication systems military devices wireless devices etc. Due to the increase in use of high operating frequency and bandwidth in electronic systems there are concerns and more chances of deterioration of the radio wave environment known as electromagnetic interference EMI . This EMI has adverse effects on electronic equipments such as false operation due to unwanted electromagnetic waves and leakage of information in wireless telecommunications 1 . Hence in order to .

TÀI LIỆU LIÊN QUAN
crossorigin="anonymous">
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.