tailieunhanh - Electromagnetic shielding ability of ball milled porous carbon reinforced commercial paints

Carbon materials have been attracting intensive attention especially after the discoveries of fullerenes in 1985 and graphene in 2004. Our aim is to develop an efficient, low-cost and largescale synthesis method of a carbon material called porous carbon, which is a collection of nanoscale mono- and multi-layer graphene flakes. This work presents the method of producing porous carbon and the capability of electromagnetic shielding of a typical commercial paint reinforced by the fabricated carbon material. | Journal of Science and Technology 54 (1A) (2016) 315-323 ELECTROMAGNETIC SHIELDING ABILITY OF BALL-MILLED POROUS CARBON-REINFORCED COMMERCIAL PAINTS Pham Binh Minh, Nguyen Tuan Minh, Do Van Nam*, Cao Xuan Thang, Nguyen Thi Khoi, Pham Thanh Huy Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology (HUST), No 01, Dai Co Viet Road, Hanoi, Vietnam * Email: Received: 7 September 2015; Accepted for publication: 15 October 2015 ABSTRACT Carbon materials have been attracting intensive attention especially after the discoveries of fullerenes in 1985 and graphene in 2004. Our aim is to develop an efficient, low-cost and largescale synthesis method of a carbon material called porous carbon, which is a collection of nanoscale mono- and multi-layer graphene flakes. This work presents the method of producing porous carbon and the capability of electromagnetic shielding of a typical commercial paint reinforced by the fabricated carbon material. Keywords: electromagnetic shielding, porous carbon, ball milling. 1. INTRODUCTION Passengers who travel by airplanes are familiar with the demand of the pilots that all portable electronic devices such as mobile phones and laptops, must be turned off just before taking-off and landing for the reason of safety. However, it seems to be not so clear for most people about the cause of such a demand. The truth is that all electronic devices are sources of electromagnetic radiation so that if there is an occurrence of electromagnetic interference (EMI), the operation of some equipment of the planes may be disturbed and therefore may create severe risks. According to Vasquez et al. (see Ref. [1] and references therein) there were already expensive lessons in the aviation. Typically they were the five crashes of Blackhawk helicopters in the United States shortly after their introduction into service in the late 1980s with the cause being found to be EMI occurring in the electronic .