Mechanical Properties and Flame Retardancy of Epoxy Resin/ Nanoclay/Multiwalled Carbon Nanotube Nanocomposites

Tuan Anh Nguyen ,1 Quang Tung Nguyen,1 and Trong Phuc Bach2 Bài báo của nhóm tác giả thuộc Khoa Công nghệ hóa - Trường Đại học Công nghiệp Hà Nội và TRường Đại học Bách Khoa Hà Nội đăng trên tạp chí Hindawi - Journal of Chemistry Volume 2019. doi: /10.1155/2019/3105205

This paper reports the improvement of the mechanical properties and flame retardant properties of epoxy Epikote 240/nanoclay I.30E/multiwalled carbon nanotube nanocomposite prepared by mechanical stirring method combined with ultrasonic vibration, nanoclay I.30E content (1; 2; 3 wt.%) and content of MWNT (0.01; 0.02; 0.03 wt.%). When burned, MWCNTreduces egradation speed of epoxy Epikote 240 resin and increases the char yield, and nanoclay acts as an energy storage medium to hinder he heat transfer in epoxy resin. &e limiting oxygen index value and UL94 test indicated improvement of flame retardancy of the nanocomposites. &e results exhibit the potentiality of these based epoxy Epikote 240 resin/nanoclay I.30E/MWCNTs anocomposites for multifaceted advanced applications. &ese fillers can produce environmental friendly products with high thermal and mechanical properties.

1. Introduction
Currently, multicarbon carbon nanotubes and nanoclay are the stuffing widely used because they improve both the fireretardant properties and mechanical properties of epoxy plastic; they do not create toxic fumes or smoke corrosion during burning rocess, unlike common fire-retardant materials based on halogen compounds [1, 2]. Some studies have investigated the fire resistance of epoxy-based nanocomposite materials in MWCNTs and stated that, for MWCNTs, at the content of 2 and 4%, 5% by weight, the fire
resistance of the material increases. It is explained that the formation of coal coating on the surface of the sample separated from xygen in the environment leads to the prevention of the development of flame [3, 4]. &erefore, the improvement of fire resistance of materials is clearly shown. For nanoclay additives, Cevdet et al. conducted research on mechanical properties, flammability, and tructural morphology of epoxy/clay nanocomposite; nanoclay has been prepared with the content of 0.5, 1, 2, and 3% by weight [5].
&is work focuses on the study of flammability and mechanical properties of epoxy Epikote 240 substrate nanocomposites materials by adding MWCNT (0.02 wt.%) and nanoclay I.30E (2 wt.%), a small amount compared to the other works announced.

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