Optimized thermochemical detoxification of asbestos-containing waste using chemical additives and microwave heat treatment

Enhancing ablation and oxidation resistance of phenolic resin with modified pickling asbestos

“…Therefore, the appropriate introduction of MPA is conductive to improve the insulation performance of composites. In addition, from the static ablation experiment (Figure 2F), it can be found that when MPA content is 5 wt%, the MPABPR exhibits the highest thermal residual mass (57.91%), which is due to the generation of the ceramic protection phase from MPA at high temperature, improving the oxidation resistance of the composite 29 . The thermal degradation curves with increased MPA contents (Figure 2G,H) show the cracking of composites can be roughly divided into four stages.…”

“…In addition, from the static ablation experiment (Figure 2F), it can be found that when MPA content is 5 wt%, the MPABPR exhibits the highest thermal residual mass (57.91%), which is due to the generation of the ceramic protection phase from MPA at high temperature, improving the oxidation resistance of the composite. 29 The thermal degradation curves with increased MPA contents (Figure 2G,H) show the cracking of composites can be roughly divided into four stages. The weight of BPR and MPABPR composites reduced in the first and second stages (<300 C) is mainly because of the escape of small molecular products such as water.…”

“…As a kind of silicate mineral fiber, pickling asbestos (PA) has a unique fiber structure, good thermal stability, heat insulation performance, and lower impurity content than traditional asbestos. 28,29 Meanwhile, the one-dimensional fiber structure and low ceramization temperature of PA help to fabricate a fiber-reinforcement network and generate a ceramic phase at low temperatures. 29,30 In view of these characteristics mentioned above of one-dimensional PA, a fiber-reinforced network was successfully constructed in BPR by the modified PA (MPA) with improved dispersion and compatibility for the first time.…”

“…28,29 Meanwhile, the one-dimensional fiber structure and low ceramization temperature of PA help to fabricate a fiber-reinforcement network and generate a ceramic phase at low temperatures. 29,30 In view of these characteristics mentioned above of one-dimensional PA, a fiber-reinforced network was successfully constructed in BPR by the modified PA (MPA) with improved dispersion and compatibility for the first time. The effect of MPA on the thermal stability, high-temperature strength, and ablative properties of the composites was studied systematically.…”

“…As a kind of silicate mineral fiber, pickling asbestos (PA) has a unique fiber structure, good thermal stability, heat insulation performance, and lower impurity content than traditional asbestos 28,29 . Meanwhile, the one‐dimensional fiber structure and low ceramization temperature of PA help to fabricate a fiber‐reinforcement network and generate a ceramic phase at low temperatures 29,30 .…”