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生物质纤维基发泡复合材料性能研究 总被引:1,自引:0,他引:1
以聚合物发泡技术与人造板工艺技术结合制备生物质纤维基发泡复合材料,重点研究发泡对复合材料力学性能的影响.研究结果表明:以碳酸氢钠为发泡剂对生物质纤维基复合材料进行发泡可以有效提高材料的物理力学性能.经方差和极差分析得知,本研究的最佳工艺条件为:施胶量为25%,发泡剂加量6%、热压温度165℃、热压时间6分钟. 相似文献
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本文对PET纤维及微孔发泡材料进行了简要的介绍,在超临界CO2的条件下制备出了微孔发泡PET纤维,并对发泡前后PET纤维的性能进行了初步研究。研究表明,微孔发泡PET纤维与未发泡的PET纤维相比,直径和回潮率有明显的增加,断裂强度下降,但是断裂伸长率增加。 相似文献
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正斯道拉恩索将建立一个新的生物质复合材料技术中心, 以及安装新的大尺寸纤维研磨设备用于生产生物质复合材料DuraSense~(TM)。为了满足日益增长的客户需求,斯道拉恩索将扩大其瑞典Hylte工厂生物质复合材料原料来源,以便在技术性能和纤维原料选择方面具有更多选择。斯道拉恩索的此项投资包括建立一个新的生物质复 相似文献
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本文采用玻璃纤维/聚丙烯喷气混纤纱单向缠绕并在平板热压硫化机上制作玻璃纤维/聚丙烯单向复合材料,并利用纤维增强复合材料中空隙率测试方法,分析了加工条件对喷气混纤型玻璃纤维增强聚丙烯塑料中空隙率的影响。 相似文献
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随着化学纤维技术的发展,出现了许多新型复合纤维材料,如纤维、塑料复合材料(称 FK 材料)和碳纤维、纤维、塑料复合材料(称 CFK 碳纤维增强塑料)。这些纤维材料的出现,使纺织品进入了一个崭新的 相似文献
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为适应市场需求,山西省产品质量检验研究所开发了成型密度范围在0.3~0.5g/cm3的新型低密度SH系列微孔鞋底材料,适于制作高档鞋中底、凉鞋底和休闲鞋底等。这种低密度微孔PU鞋材由于原液的软硬链段设计合理,发泡剂量适合,改善了普通鞋底材料随密度降低而产生带有塑料感的缺 相似文献
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含有陶瓷粉末PP—纤维的拉伸性能 总被引:3,自引:0,他引:3
本文分析了用SiO2/PP复合材料纺制纤维的形态结构和力学性能。结果表明,在牵伸过程中,初生纤维中的微孔逐步消失,断裂强度和E'-T曲线上的E'值及耐热性有些增加。在tanδ-T曲线上出现a峰,其峰值随拉伸倍数的增加而增加,六倍牵伸后a峰略有降低。 相似文献
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In this study, Cashew Nut Shell Liquid (CNSL)-epoxy matrix-based composites reinforced with borassus and tamarind fibres were fabricated using compression moulding technique. Three different types of composites were fabricated, namely Borassus fruit fine fibre/CNSL-epoxy composites (BF composites), Tamarind fibre/CNSL-epoxy composites (TF composites) and Tamarind/Borassus fruit fine fibre CNSL-epoxy hybrid composites (HB composites). In addition, CNSL-epoxy neat polymer was also fabricated for comparison. Physical properties such as micro-hardness, void percentage, and mechanical properties like tensile, flexural, Interlaminar Shear Strength (ILSS), and impact strength were investigated. Scanning Electron Microscope (SEM) was used to study the failure mechanism of the composites. Experimental results indicate that tensile and flexural properties of BF composites were higher when compared to TF and HB composites. Micro-hardness and impact strength of HB composites were better than the others. SEM images indicated better fibre-matrix bonding in BF composites indicating improved resistance to delamination. Thus, borassus and tamarind fibre reinforced CNSL-epoxy composites can be used as an alternative material for light to moderately loaded structural engineering applications. 相似文献
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基于三维五向编织复合材料细观单胞模型,将材料内部、表面、棱角区域内具有相同走向的纤维束简化为单向复合材料,利用桥联模型,确定了单向复合材料的柔度矩阵,将具有不同材料主向的单向复合材料的刚度通过体积进行平均,得到了三维五向编织复合材料的总体刚度矩阵,进一步计算得到材料的工程弹性常数;以单向复合材料为基础,宏观上基于等应变假设,结合桥联模型,确定出材料内各组分(纤维束和基体)的细观应力分布,对纤维束采用Hoffman失效准则,基体采用Mises失效准则,预报了三维五向编织复合材料的拉伸强度。结果表明,三维五向编织复合材料的刚度和强度的预测值与实验值吻合较好,验证了本文分析模型的有效性。 相似文献
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三维中空夹芯复合材料是一种新型夹芯结构材料,具有轻质、高强、高模、抗冲击、隔音、保温等特性,可广泛用于航空航天、汽车、储油罐、船舶、建筑、能源等领域。本文选取芯材高度分别为2、4、6和8mm,以及芯材间距分别为4、6和8 mm的两组三维中空夹芯复合材料为样品,测试其平压性能,重点研究芯材高度、芯材间距等结构参数对三维中空夹芯复合材料平压性能的影响,并分析材料的压缩特性及损伤机理。结果表明,三维中空夹芯复合材料受到平压载荷时的破坏模式为明显的脆性破坏,同时,材料破坏形式主要表现为树脂开裂、纤维断裂、界面脱粘等特征。三维中空夹芯复合材料的平压性能随着芯材高度、芯材间距的增加而下降。研究结果将为该材料的结构优化设计和性能分析奠定理论基础。 相似文献
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混杂纤维复合材料的研究进展 总被引:2,自引:0,他引:2
混杂纤维复合材料作为一种新型复合材料极大地扩展了复合材料的性能和使用范围.对混杂复合材料拉伸性能、冲击性能、热性能、摩擦性能、阻尼减震性能、吸波性能等方面的研究进展进行了综述,并简要介绍了混杂纤维复合材料的应用情况及发展. 相似文献
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木塑复合材料的研究、发展及展望 总被引:3,自引:0,他引:3
木塑复合材料(WPC)具有比单独的木质材料或塑料产品更优异的性质,是木材的理想替代品,它的出现可以减少废弃木材和塑料对城市环境的污染,也适应现代材料复合化发展的规律。本文简要介绍了木塑复合材料的分类、复合途径以及在国内外的应用发展现状,并对木塑复合材料的发展方向进行了分析,充分肯定了发展木塑复合材料的必要性和可行性。 相似文献
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为平衡防刺服的防刺性能及穿着舒适性,采用软硬结合的设计理念,提出了一种离散树脂成型复合材料的成型工艺。选用改性聚碳酸酯薄片,以离散状态按照设计图案黏结在涤纶与芳纶基布面料上制备柔性防刺复合材料,探讨不同种类离散树脂成型复合材料的防刺性能,并研究该复合材料的透气性能与弯曲性能。结果表明:芳纶基布离散树脂成型复合材料的穿刺强度是涤纶基布离散树脂成型复合材料的2倍;4层离散树脂成型复合材料与40层叠层芳纶平纹布的防刺性能相当,并显著降低了材料厚度和质量;离散树脂成型复合材料的柔软性能良好,且透气性能优异。 相似文献
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为制备新型轻质隔声复合材料,以聚氯乙烯(PVC)为基体材料,中空微珠(HGM)为基体的填充材料,柠檬酸三丁酯为增塑剂,涤纶织物为增强材料,自制二氧化硅/柠檬酸三丁酯上浆剂为界面优化剂,采用接触成型技术制备了涤纶织物/PVC-HGM复合材料,并利用双声道声学测试仪对复合材料的隔声性能进行测试。结果表明:相同厚度的涤纶织物/PVC-HGM复合材料试样,随着HGM体积分数的增加,复合材料的面密度呈线性下降; HGM体积分数的增加不能显著提高涤纶织物/PVC-HGM复合材料的隔声性能;随着HGM粒径的增大,HGM体积分数相同的涤纶织物/PVC-HGM复合材料的隔声性能明显提高。 相似文献
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Impact properties of thermoplastic composites 总被引:1,自引:0,他引:1
The excellent properties exhibited by thermoplastic composites at much reduced weight have attracted attention in the development of products in different sectors. Thermoplastic (TP) composites, because of their distinctive properties as well as ease of manufacturing, have emerged as a competitor against the conventional thermoset resin-based composites. Depending on the application, these composites may undergo impact events at various velocities and often fail in many complex modes. Hence, the development of TP composites having high energy-dissipation at (the desired) much-reduced weight has become a challenging task, but it is a problem which may be alleviated through the appropriate selection of materials and fabrication processes. Furthermore, fibre surface modification has been shown to increase fibre-matrix interfacial adhesion, which can lead to improved impact resistance. Textile preforms are helpful in acting as a structural backbone in the composites since they offer a relatively free hand to the composite designer to tailor its properties to suit a specific application. Additionally, hybrid textile composite structures may help in achieving the desired properties at much lower weight.Simulation software can play a significant role in the evaluation of composites without damaging physical samples. Once the simulation result has been validated with actual experimental results, it should be possible to predict the test outcomes for different composites, with different characteristics, at different energy levels without conducting further physical tests. Various numerical models have been developed which have to be incorporated into these software tools for better prediction of the result.In the current issue of Textile Progress, the effects of various materials and test parameters on impact behaviour are critically analyzed. The effect of incorporating high-performance fibres and natural fibres or their hybrid combination on the impact properties of TP composites are also discussed and the essential properties of TP polymers are briefly explained. The effects of fibre and matrix hybridization, environmental factors, various textile preform structures and fibre surface modification treatments on the impact properties of thermoplastic composites are examined in detail. Various numerical models used for impact analysis are discussed and the potential applications of TP composites in automobile, aerospace and medical sectors are highlighted. 相似文献