0 引言
1 试验部分
1.1 材料
1.2 微波热解−氧化装置
1.3 样品表征分析
1.4 计算
2 结果与讨论
2.1 温度分布规律
图2 反应器温度随物料停留时间的变化:12 kW(a)和18 kW(b)功率下微波热解炉温度场分布;微波热解炉壁(c)和氧化炉(d)的温度测量值Fig. 2 Variation of reactor temperature with material residence time: temperature distribution of microwave pyrolysis furnace temperature field at 12 kW (a) and 18 kW (b) power; microwave pyrolysis furnace wall (c) and oxidation furnace (d) temperature measurement |
2.2 产品收率
2.3 TG分析
表1 各样品在N2或空气气氛下TG/DTG分析数据Table 1 TG and DTG curves for analytical data for each sample under N2 or air atmosphere |
序号 | 样品 | 编号 | 最大失重速率(对应温度) | 最大失重率/% (N2气氛下) | |
---|---|---|---|---|---|
N2气氛下 | 空气气氛下 | ||||
1 | 新鲜碳纤维 | vCF | — | 7.57%/℃(824.6 ℃) | 1.57 |
2 | 碳纤维复合板 | WBW | 3.47%/℃(430.2 ℃) | 1.26%/℃(366.8 ℃) 1.54%/℃(435.0 ℃) 1.26%/℃(561.6 ℃) 5.63%/℃(870.3 ℃) | 26.62 |
3 | 18 kW热解产物 | pWBW@18 kW | — | 7.34%/℃(879.1 ℃) | 5.97 |
4 | 450 ℃氧化产物 | rCF@450 ℃ | — | 7.54%/℃(880.2 ℃) | 3.37 |
5 | 500 ℃氧化产物 | rCF@500 ℃ | — | 7.13%/℃(880.3 ℃) | 1.60 |
6 | 550 ℃氧化产物 | rCF@550 ℃ | — | 7.13%/℃(830.2 ℃) | 1.34 |
2.4 SEM分析
图6 新鲜碳纤维、碳纤维复合板热解及氧化产物SEM图:(a)新鲜碳纤维;(b)18 kW功率下微波热解产物;(c ~ e)450 ℃、500 ℃、550 ℃氧化产物Fig. 6 SEM diagram of pyrolysis and oxidation products of fresh carbon fiber and carbon fiber composite panel: (a) fresh carbon fiber; (b) microwave pyrolysis products at 18 kW power; (c ~ e) oxidation products at 450 °C, 500 °C, 550 °C |