0 引言
1 实验部分
1.1 实验材料
表1 H2和He的物理参数Table 1 Physical parameters of H2 and He |
气体类型 | 分子有效直径/nm | 平均自由程/nm | 相对分子质量 | 密度/(g/L) | 临界温度/℃ |
---|---|---|---|---|---|
H2 | 0.273 | 12.3 | 2.016 | 0.089 9 | −239.97 |
He | 0.218 | 190.0 | 4.003 | 0.178 6 | −267.98 |
1.2 实验方法及仪器
2 结果与讨论
2.1 温度对氢渗透的影响
表2 不同温度下两种气体在PA6中的渗透性能Table 2 Permeability of two gases in PA6 at different temperatures |
试样编号 | 温度/℃ | 气体 | P/[cm3∙cm/(cm2∙s∙Pa)] | D/(cm2/s) | S/[cm3/(cm2∙cm∙Pa)] |
---|---|---|---|---|---|
1 | 15 | H2 | 1.270 × 10−13 | 1.273 × 10−6 | 9.976 × 10−8 |
He | 1.077 × 10−13 | 4.275 × 10−6 | 2.519 × 10−8 | ||
23 | H2 | 1.747 × 10−13 | 1.687 × 10−6 | 1.036 × 10−7 | |
He | 1.545 × 10−13 | 5.656 × 10−6 | 2.732 × 10−8 | ||
40 | H2 | 3.380 × 10−13 | 2.921 × 10−6 | 1.157 × 10−7 | |
He | 2.519 × 10−13 | 7.150 × 10−6 | 3.523 × 10−8 | ||
55 | H2 | 5.444 × 10−13 | 4.238 × 10−6 | 1.284 × 10−7 | |
He | 4.116 × 10−13 | 8.949 × 10−6 | 4.600 × 10−8 | ||
2 | 15 | H2 | 9.390 × 10−14 | 1.242 × 10−6 | 7.560 × 10−8 |
He | 7.387 × 10−14 | 3.704 × 10−6 | 1.994 × 10−8 | ||
23 | H2 | 1.291 × 10−13 | 1.708 × 10−6 | 7.559 × 10−8 | |
He | 9.480 × 10−14 | 4.965 × 10−6 | 1.970 × 10−8 | ||
40 | H2 | 2.528 × 10−13 | 2.740 × 10−6 | 9.226 × 10−8 | |
He | 1.779 × 10−13 | 5.815 × 10−6 | 3.059 × 10−8 | ||
55 | H2 | 3.976 × 10−13 | 3.990 × 10−6 | 9.965 × 10−8 | |
He | 2.948 × 10−13 | 8.014 × 10−6 | 3.679 × 10−8 | ||
3 | 15 | H2 | 8.453 × 10−14 | 1.231 × 10−6 | 6.867 × 10−8 |
He | 7.598 × 10−14 | 3.938 × 10−5 | 1.929 × 10−7 | ||
23 | H2 | 1.162 × 10−13 | 1.822 × 10−6 | 6.378 × 10−8 | |
He | 8.205 × 10−14 | 1.079 × 10−5 | 7.604 × 10−7 | ||
40 | H2 | 2.307 × 10−13 | 7.609 × 10−6 | 3.032 × 10−8 | |
He | 1.792 × 10−13 | 6.575 × 10−6 | 2.725 × 10−8 | ||
55 | H2 | 3.996 × 10−13 | 4.521 × 10−6 | 8.839 × 10−8 | |
He | 3.001 × 10−13 | 8.213 × 10−6 | 3.654 × 10−8 |
图1 1号试样两种气体透过系数拟合直线Fig. 1 Fitting lines for the permeability coefficients of two gases in sample 1 |
表3 两种气体渗透性拟合直线参数计算结果Table 3 Calculation results of fitting line parameters for the two gases' permeability |
试样编号 | 气体 | 斜率 | Ep/(kJ/mol) | 截距 | P0/[cm3∙cm/(cm2∙s∙Pa)] |
---|---|---|---|---|---|
1 | H2 | −7.68 | 63.82 | −12 343.00 | 33.55 |
He | −10.22 | 84.93 | −11 000.00 | 29.90 | |
2 | H2 | −18.04 | 149.91 | −3 442.89 | 9.36 |
He | −18.79 | 156.14 | −3 304.22 | 8.98 | |
3 | H2 | −17.32 | 143.93 | −3 684.08 | 10.01 |
He | −18.38 | 152.74 | −3 436.00 | 9.34 |
2.2 结晶度分析
2.3 H2和He渗透的关系
表5 H2与He透过系数的转换系数Table 5 Conversion coefficient of permeability coefficients for H2 and He |
温度/℃ | β | ||
---|---|---|---|
试样1 | 试样2 | 试样3 | |
15 | 1.18 | 1.27 | 1.11 |
23 | 1.13 | 1.36 | 1.42 |
40 | 1.34 | 1.42 | 1.29 |
55 | 1.32 | 1.35 | 1.33 |