Effects of graphene content on formation and characteristics of char layer in intumescent coating

Vietnam Journal of Science and Technology - Tập 62 Số 5 - Trang 906-914 - 2024
Phan Ngoc Hong1, Nguyen Tuan Hong1, Nguyen Anh Duc2, Nguyen Thi Ngoc Tu3, Le Van Duan3, Vu The Ninh3, Tran Thu Trang3, Nguyen Thi Lien3, Giang Thi Phuong Ly4, Dung Nguyen Viet3
1Center for High Technology Development, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
2Faculty of Basic-fundamental Sciences, Vietnam Maritime University, 484 Lach Tray, Kenh Duong, Le Chan District, Hai Phong, Viet Nam
3Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay District, Ha Noi, Viet Nam
4School of Chemical Engineering, Hanoi University of Science and Technology, 1 Dai Co Viet Street, Hai Ba Trung District, Ha Noi, Viet Nam

Tóm tắt

This study provides a better understanding of the role and mechanism of graphene nano-platelets used as a flame-retardant filler in a commercial intumescent acrylic-based formulation. Through thermogravimetric analysis, the morphology and mechanical properties of the char layer as well as the influence of graphene on the expansion ratio and compression force are clarified. The achieved results demonstrate that graphene accelerates the burning of the coating and affects the structure of the char layer. The fire test was carried out in an electric furnace at a temperature of up to 800 °C for our fabricated samples, the swelling images show that the expansion ratio of the graphene-loaded coating is lower than that of the coating without graphene. On the other hand, during the combustion, the speed of air release occurring in a short time also contributes to forming bigger holes in the char layer, so the hardness of the graphene-loaded char layer is lower than that of the char layer without graphene coating.

Từ khóa

#flameretardant coating #intumescent #graphene #char layer

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Thông tin xuất bản

Vietnam Journal of Science and Technology

Tập 62 Số 5

906-914

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