高强高模聚酰亚胺纤维及其应用研究

发布时间：2018-03-20 04:35

本文选题：高强高模　切入点：聚酰亚胺　出处：《绝缘材料》2016年08期 　论文类型：期刊论文

【摘要】：聚酰亚胺(PI)纤维是一种新型高性能纤维,具有耐高低温、高强高模、耐辐照、阻燃、绝缘、低的吸水率和优异的介电性能等。以PI的预聚体—聚酰胺酸溶液为纺丝液,采用具有自主知识产权的一体化连续纺丝技术,通过化学结构设计和纺丝工艺控制,开发出耐高温、高强中模、高强高模等系列高性能PI纤维产品,最高强度和模量分别达到4.0 GPa和160 GPa。与芳纶纤维、超高分子量聚乙烯纤维等相比,PI纤维显示出优异的耐高温、耐紫外、耐酸性能和较低的吸水率。以高强高模PI纤维为增强体,制备了热固性环氧树脂基体及热塑性尼龙基体复合材料,分析其性能,结果表明纤维与树脂基体之间具有良好的界面性能。针对热塑性复合材料,PI纤维的加入使复合材料的强度和韧性均得到大幅提高,PI纤维将在航空航天、电力、防护、环保、核工业等领域有广阔的应用前景。
[Abstract]:Polyimide (Pi) fiber is a new type of high performance fiber with high and low temperature resistance, high strength and high modulus, high radiation resistance, flame retardant, insulation, low water absorption and excellent dielectric properties. By adopting the integrated continuous spinning technology with independent intellectual property rights, through chemical structure design and spinning process control, a series of high performance Pi fiber products, such as high temperature resistance, high strength medium modulus, high strength high modulus, high strength and high modulus, were developed. The highest strength and modulus reached 4.0 GPa and 160GPa.Compared with aramid fiber and ultra-high molecular weight polyethylene fiber, Pi fiber showed excellent high temperature resistance, ultraviolet resistance, acid resistance and low water absorption. High strength and high modulus Pi fiber were used as reinforcements. Thermosetting epoxy resin matrix and thermoplastic nylon matrix composites were prepared and their properties were analyzed. The results show that the fiber has good interfacial properties with resin matrix. The strength and toughness of the composites can be greatly improved by the addition of Pi fibers in thermoplastic composites, which will be used in aerospace, power, protection and environmental protection. Nuclear industry and other fields have broad application prospects.
【作者单位】：北京化工大学材料科学与工程学院;江苏先诺新材料科技有限公司;
【基金】：国家重点基础研究发展计划(973计划)项目(2014CB643600) 国家自然科学基金资助项目(51373008)
【分类号】：TQ342

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