The surface morphologies of two T800 carbon fibers produced from polyacrylonitrile by dry-jet wet spinning and wet spinning were compared. The mechanical properties of Naval Ordnance Laboratory (NOL) rings made from their composites with an epoxy resin matrix, and the strain distributions and hydrostatic breaking pressures of filament-wound pressure vessels produced from them were investigated. Results indicated that dry-jet wet spinning resulted in carbon fibers with a smooth surface while wet spinning gave rise to many surface grooves with uneven widths and depths on the fiber surface. Comparing the two fibers in epoxy resin composite NOL ring tests, those with the wet-spun T800 carbon fibers were more brittle, but had a higher interlaminar shear strength. A filament-wound pressure vessel using the wet-spun T800 carbon fibers was easier to burst at a place located between the dome and the cylinder while that using the dry-jet wet-spun carbon fibers was burst without a preferred broken location in a hydrostatic test. For a 150 mm diameter filament-wound pressure vessel made of the T800 wet-spun carbon fibers, the performance factor (PV/Wc, where P is pressure, V is the volume and W_c is the composite weight) is 34.8 km, which is significantly lower than one made using the T800 dry-jet wet-spun carbon fibers (47.2 km), indicating that the dry-jet wet spun carbon fibers are more suitable for preparing a filament-wound pressure vessel.

比较了由聚丙烯腈通过干喷湿法纺丝和湿法纺丝生产的两种T800碳纤维的表面形态。研究了由其与环氧树脂基复合材料制成的海军军械实验室（NOL）环的机械性能，以及由它们制成的绕丝压力容器的应变分布和静水破裂压力。结果表明，干喷湿法纺丝可使碳纤维表面光滑，而湿法纺丝会产生许多表面沟槽，纤维表面上的宽度和深度均不均匀。在环氧树脂复合材料NOL环测试中比较这两根纤维，湿纺T800碳纤维的脆性更高，但层间剪切强度更高。使用湿纺T800碳纤维的长丝缠绕压力容器更容易在圆顶和圆柱体之间的位置处破裂，而使用干喷湿纺碳纤维的压力容器在静水压力下破裂时没有优选的破裂位置测试。对于由T800湿纺碳纤维制成的直径为150毫米的长丝缠绕压力容器，性能系数（PV / W c，其中P为压力，V为体积，W _c为复合材料重量）为34.8 km，这明显低于使用T800干喷湿纺碳纤维制成的碳纤维（47.2 km），表明干喷湿纺碳纤维更适合于制备长丝缠绕压力容器。