SYNTHESIS OF THERMOSENSITIVE COMPOSITE GEL CONTAINING NANOCOMPOSITE HYDROGEL APPLIED TO EXTINGUISH CLASS A FIRES

  • Le Ha Giang, Duong Anh Thanh, Pham Thi Ha My, Pham Thi Thu Trang, Quan Thi Thu Trang, Nguyen Ha Thanh, Pham The Chinh, Nguyen Van Chien, Ngo Quoc Anh
Keywords: Composite gel; Extinguish class A; Adsorption; Nano bentonite; Superabsorbent polymer

Abstract

Extinguishing agents are essential firefighting tools in the fight against fires. In this work, a composite gel used to extinguish class A fire is created from methylcellulose, super absorbent polymer and nano bentonite. The composite gel is formed through the hydro bonding between the three components. The composite gel has thermal sensitivity and is used to extinguish wood cribs fires. The results show that the phase transition of the composite gel occurs when the temperature is above 90 °C, increasing its viscosity and adhesion to the surface of the burning material, and acting as a barrier to isolate oxygen from the flame. Small-scale fire extinguishing tests reveal that the composite gel has better fire extinguishing capabilities, cooling time and CO gas adsorption capacity than the water. The sample of composite gel with a nano bentontite content of 0.25 g has the shortest time to completely extinguish the fire (129 s) and emits a CO concentration below 100 ppm.

điểm /   đánh giá
Published
2023-06-13
Issue
Vol. 228 No. 10 (2023): NATURAL SCIENCES - ENGINEERING - TECHNOLOGY
Section
NATURAL SCIENCE – ENGINEERING – TECHNOLOGY