共查询到18条相似文献,搜索用时 125 毫秒
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聚对苯撑苯并二恶唑(PBO)纤维表面化学惰性较强,应用方面受到了较大的限制。PBO纤维经表面改性后可与其它化合物形成复合材料,如PBO树脂基增强复合材料以及PBO纤维纳米复合材料等,PBO纤维复合材料凭借优异的力学及化学性能在各领域都获得了较大的应用及发展。介绍了PBO树脂基增强复合材料和PBO纤维纳米复合材料的应用及发展。近些年,PBO纤维复合材料已经逐步取代传统的金属材料。但是目前PBO纤维复合材料仍有较大的研究空间,其开发对于航空、航天和国防等高新技术领域材料及产品更新换代具有重要意义。 相似文献
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环氧树脂/PBO纤维复合材料性能研究 总被引:1,自引:0,他引:1
对环氧树脂(EP)/聚对苯撑苯并二恶唑(PBO)纤维复合材料的性能进行初步研究。结果表明,用浓度70%的甲基磺酸(MSA)溶液对PBO纤维表面进行处理,可改善PBO纤维与EP基体的粘结强度,但同时使PBO纤维的拉伸性能降低;对PBO纤维处理2h后,以胺类固化剂固化的EP/PBO纤维复合材料的层间剪切强度比处理前提高41%,以酸酐固化剂固化的EP/PBO纤维复合材料的层间剪切强度比处理前提高48%;前者的层间剪切强度大于后者。 相似文献
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PBO超级纤维研究进展及其表面处理 总被引:24,自引:0,他引:24
黄玉东 《高科技纤维与应用》2001,28(1):11-16
介绍了PBO(聚苯撑苯并二恶唑)超级纤维的制备,其结构、性能以及应用等方面的研究进展,并结合PBO纤维的特点,评述了PBO纤维表面处理的研究概况。 相似文献
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利用聚对苯撑苯并双恶唑(PBO)纤维与酚醛树脂制备先进复合材料,研究该单向复合材料的层间剪切性能、弯曲性能、冲击性能和动态力学性能,并分析该复合材料的吸湿脱湿行为和热氧老化行为.酚醛树脂/PBO纤维单向复合材料的层间剪切强度为21.25 MPa,弯曲强度为439.53 MPa,弯曲弹性模量为50.11GPa. 相似文献
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复合材料良好的界面结合可使增强纤维发挥最大的承载作用,良好的纤维表面性能有助于纤维性能转化率的提高,从而有利于其力学性能。为研究国产聚对苯撑苯并二噁唑(PBO)纤维表面特性对酚醛基复合材料拉伸性能的影响,采用扫描电子显微镜、原子力显微镜和接触角测量仪分析了三种国产高模型PBO纤维的表面特性,并计算其纤维强度转化率。研究发现,PBO纤维的表面粗糙度和沟槽等对复合材料的界面性能及纤维强度转化率具有显著影响。结果表明:三种国产PBO纤维表面均有明显的黏附物和纤维向沟槽,表面杂质少、沟槽较多,表面粗糙度最大、表面自由能最高的PBO-A纤维强度转化率最高,PBO纤维的强度转化率(40%~50%)远低于碳纤维的强度转化率(70%~90%),其与树脂的工艺匹配性有待进一步提高。 相似文献
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将聚对苯二甲酰对苯二胺(PPTA)纤维、碳纤维(CF)、聚四氟乙烯(PTFE)纤维和聚对苯撑苯并二噁唑(PBO)纤维4种短纤维添加到四丙氟橡胶(FEPM)中制备复合材料FEPM/PPTA、FEPM/CF、FEPM/PTFE、FEPM/PBO,并研究了复合材料的硫化特性、力学性能、耐热性能和耐热氧老化性能。结果表明:FEPM/CF的扭矩差(MH-ML)最大、综合力学性能最佳,FEPM/PPTA与FEPM/PBO的耐热性和耐热氧老化性优于其他两种复合材料。 相似文献
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汪家铭 《高科技纤维与应用》2009,34(2):42-47
介绍了聚对苯撑苯并二恶唑(PBO)纤维的性能特点、单体和聚合物合成及液晶纺丝制造工艺,综述了PBO纤维近30年来在国内外发展的技术进展及其应用前景,指出PBO纤维是一种高强度、高模量、高热稳定性和高耐化学腐蚀性的新型纤维,在高温过滤、电子电气、合成材料、安全防护、国防军工、交通运输、航空航天、桥梁工程、建筑建材等20多个工业领域都有广泛的应用,并对今后国内PBO纤维的发展提出了建议。 相似文献
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The influence of oxygen plasma treatment on both surface properties of poly(p‐phenylene benzobisoxazole) (PBO) fibers and interfacial properties of PBO fiber reinforced poly(phthalazinone ether sulfone ketone) (PPESK) composite were investigated. Surface chemical composition, surface roughness, and surface morphologies of PBO fibers were analyzed by X‐ray photoelectron spectroscopy (XPS), Atomic force microscopy (AFM), and scanning electron microscopy (SEM), respectively. Surface free energy of the fibers was characterized by dynamic contact angle analysis (DCAA). The interlaminar shear strength (ILSS) and water absorption of PBO fiber‐reinforced PPESK composite were measured. Fracture mechanisms of the composite were examined by SEM. The results indicated that oxygen plasma treatment significantly improved the interfacial adhesion of PBO fiber‐reinforced PPESK composite by introducing some polar or oxygen‐containing groups to PBO fiber surfaces and by fiber surface roughening. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009 相似文献
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Effects of Basic Chemical Surface Treatment on PBO and PBO Fiber Reinforced Epoxy Composites 总被引:4,自引:0,他引:4
The effects of chemical surface treatment on PBO fiber and its composite materials were investigated using a basic sodium hydroxide solution. We evaluated several important treatment parameters quantitatively, including treatment concentration, treatment temperature and treatment time. Both as-spun (AS) and high-modulus (HM) PBO fibers were studied. The results showed that PBO fibers exhibited minimum or negligible reduction in their tensile strengths after the proposed treatment processes. The fibers’ contact angles with several liquid media were greatly reduced and the surface free energy could be increased to 58 mJ/m2 or by 17%. The interfacial shear strength between PBO fiber and the epoxy matrix was improved to 38 MPa or by 11% with the same treatment process. The composite’s failure mode also shifted from fiber/matrix interface adhesive failure to partly cohesive failure. 相似文献
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Liang Yu 《Polymer-Plastics Technology and Engineering》2013,52(8):800-805
This work examined the effect of coupling agent surface modification of Poly-p-phenylenebenzobisoxazole (PBO) fibers on mechanical and tribological performance of PBO fiber-reinforced thermoplastic polyimide (PBO/PI) composites. The results show that tensile strength and flexural strength are largely improved by coupling agent treatment. Under dry sliding conditions, coupling agent treatment is effective to reduce the wear of PBO/PI composite. The principle of improvement in interfacial adhesion between PBO fiber and PI matrix after coupling agent treatment was discussed. The surface characteristics of PBO fibers were characterized by X-ray photoelectron spectroscopy (XPS). It is found that the content of polar groups on the surface of PBO fiber treated by coupling agent increases compared with the untreated fiber. The presence of polar groups is probably leading to an increment of interfacial binding force between fibers and matrix in a composite system, and accordingly enhances the mechanical and tribological properties. 相似文献
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PBO纤维基本力学性能试验研究 总被引:1,自引:0,他引:1
针对PBO纤维的基本力学性能开展了试验研究。使用湿法缠绕工艺制备了PBO(AS)纤维束纱和PBO(HM)纤维束纱,制备了PBO纤维NOL环,测试上述两种PBO纤维束纱的拉伸性能,同时测试了PBO纤维NOL环层间剪切性能;在缠绕过程当中,PBO纤维工艺性好,适于湿法缠绕工艺使用。测试结果表明,PBO纤维的基本力学性能与报道值接近,其束纱拉伸强度高,层间剪切性能较低,说明PBO纤维表面活性差,改善PBO纤维的表面状态及其与树脂基体之间的界面相容性的研究工作将是PBO纤维复合材料以后研究的重点方向。 相似文献
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Synergy modification of the microstructure and the property of PBO fiber by γ‐ray radiation 下载免费PDF全文
Chunhua Zhang Chenyang Zhang Qi Zhang Dawei Jiang Fubin Yu Yan Liang 《Polymer Engineering and Science》2018,58(3):272-279
The effects of γ‐ray radiation on PBO fibers and its composite materials have been investigated, the results showed that the microstructure and the performance of radiated PBO fibers have been improved with 30–120 kGy radiation dose, crosslinking reactions came from PBO polymer molecule chains and micro‐fibrils. As a result, the molecular weight the thermal stability were increased, the tendency of micro‐fibrils to split‐off also decreased, the hook force of radiated PBO fibers increased by 14.0% without tensile strength loss, and the nano‐compression modulus and the flexure strength of radiated PBO fiber composites also increased by 21.0% and 22.7%, respectively. The work indicated that γ‐ray radiation could synchronously strengthen the microstructure and improve the properties of PBO fibers. POLYM. ENG. SCI., 58:272–279, 2018. © 2017 Society of Plastics Engineers 相似文献