Effects of Temperature on the Properties of the New Gel Foam

Abstract

In order to prevent coal spontaneous combustion fire effectively, a new kind of fire-fighting material – gel foam was developed in this paper. The foaming volume and half-life of foaming agent at different concentrations were measured by ROSS-Miles. Four foaming agents with less dosage and higher foaming times were selected. Then different temperatures were set to test the temperature resistance of four foaming agents and record the foaming volume data. Through analyzing the experimental results, the three optimal foaming agents were selected for pairwise compounding. Through the compounding experiment, the compound foaming agent was prepared with mass fraction of 6‰ APG and AEC at a mass ratio of 4:3, and the foaming times reached 13 times. After the addition of foam stabilizer, the foaming times of the compound were up to 15 times at room temperature, and the glue forming time is 13min. The results show that the viscosity of gel foam decreases with the increase of temperature. The higher the temperature, the shorter the gelation time. The gel does not decompose at high temperatures.

Research Progress of Gel Foam Extinguishing Agent in Coal Mines

“…In the laboratory, the primary criterion used to describe the rheology of a gel foam is the apparent viscosity. In this regard, researchers used this parameter to analyze the elements influencing the rheological properties of gel foams [84][85][86][87]. Zhang and Qin [84] proposed that with a higher concentration of a thickener and cross-linker mixture, the apparent viscosity rises.…”