不同纺丝工艺T800炭纤维及其缠绕压力容器性能差异性研究（英文）  

A comparative study of two kinds of T800 carbon fibers produced by different spinning methods for the production of filament-wound pressure vessels

作　　者：张世杰[1] 王汝敏[1] 廖英强[2] ZHANG Shi-jie;WANG Ru-min;LIAO Ying-qiang(Department of Applied Chemistry,School of Science,Northwestern Polytechnical University,Xi’an 710072,China;Xi’an Aerospace Composites Research Institute,Xi’an 710025,China)

机构地区：[1]西北工业大学理学院应用化学系,陕西西安710072 [2]西安航天复合材料研究所,陕西西安710025

出　　处：《新型炭材料》2019年第6期578-586,共9页New Carbon Materials

基　　金：高性能炭纤维项目(TDZX-16-003-02)~~

摘　　要：对比分析了采用不同纺丝工艺制备的T800HB炭纤维与T800SC炭纤维之间的微观形态、NOL环性能、压力容器应变分布及水压实验的性能差异。结果表明,纺丝工艺不同使得T800HB炭纤维较T800SC炭纤维脆性更大,与树脂基体结合更强,导致复合材料拉伸破坏时吸收能量较少而影响其拉伸性能的发挥。采用T800HB炭纤维制备的复合材料压力容器在封头上靠近赤道位置处产生了更高的压缩应变,更易在此处发生低压爆破。Φ150 mm压力容器水压检测结果表明,T800HB炭纤维压力容器由于低压破坏,环向纤维强度发挥率仅为72%,容器特性系数为34.8 km;而T800SC炭纤维压力容器环向纤维强度发挥率达92.3%,容器特性系数达47.2 km。因此,采用干喷湿纺工艺所制T800SC炭纤维更适合缠绕工艺制备压力容器。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/W_c, 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.

关 键 词：T800炭纤维 纺丝工艺 微观形态 强度发挥率 容器特性系数(PV/Wc) 

分 类 号：TB332[一般工业技术—材料科学与工程]