共查询到18条相似文献,搜索用时 125 毫秒
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硼酸铝晶须增强氰酸酯树脂的性能 总被引:4,自引:0,他引:4
采用硼酸铝(AlBw)晶须改性氰酸酯树脂制备出氰酸酯树脂/晶须复合材料,研究了表面处理和晶须用量对氰酸酯树脂体系的反应活性、复合材料力学性能以及耐湿热性的影响.结果表明,未经表面处理的AlBw晶须不能改善氰酸酯树脂体系的韧性,反而使树脂韧性下降,表面处理的晶须均可以改善树脂的力学性能,经硼酸酯偶联剂处理后的AlBw晶须使树脂体系冲击强度提高.采用硼酸酯偶联剂对AlBw晶须进行表面处理可明显改善晶须在树脂体系中的分散性.在晶须用量低于8%时,随着晶须加入量的增加,树脂体系的力学性能增大,氰酸酯树脂/晶须复合材料表现为韧性断裂并有明显的晶须拔出现象.晶须的加入使树脂体系耐热性和耐湿热性提高,加入8%的AlBw晶须使体系吸水率下降,冲击强度和弯曲强度保持率提高. 相似文献
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为改善石墨纤维和氰酸酯树脂间的界面性能,利用臭氧处理技术对石墨纤维进行表面处理,并采用AFM、XPS和IR对处理前后的石墨纤维表面形貌和组成进行了分析,研究了臭氧处理对石墨纤维/氰酸酯复合材料层间剪切强度和弯曲强度的影响.实验结果表明:臭氧处理提高了碳纤维表面活性,从而改善了石墨纤维/氰酸酯复合材料的界面粘结性能,进而改善了复合材料的界面和力学性能. 相似文献
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晶须/聚合物基复合材料的研究 总被引:4,自引:1,他引:3
综述了钛酸钾晶须、硼酸铝晶须、氧化锌晶须及有机晶须等在改性聚合物基复合材料中的研究概况,分析了这几种晶须在改性热塑性树脂基体的机械性能、热性能、摩擦磨损方面的应用,并讨论了影响复合材料性能的主要因素,提出了复合材料制备中存在的主要问题,及复合材料的制备工艺对晶须的表面改性研究是这一领域中的重要研究方向。 相似文献
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《功能材料》2015,(16)
采用四针状氧化锌晶须(ZnOw)和石墨烯纳米片(GNP)改性氰酸酯树脂(CE)制备了系列导热绝缘复合材料,研究了填料的种类和用量对氰酸酯复合材料导热、绝缘及热稳定性能的影响。当树脂基体中加入50%ZnOw或10%GNP时,复合材料的热导率分别达到0.77和0.97 W/(m·K),较纯树脂基体材料分别提高了185%和259%。将ZnOw与GNP混合填充氰酸酯树脂则更有利于提高复合材料的导热性能,当树脂基体中加入40%ZnOw和10%GNP混合填料时,复合材料的热导率可达到1.54 W/(m·K),较纯树脂基体材料提高了470%,并且该复合材料仍能够保持良好的电绝缘性能。TGA结果表明,石墨烯纳米片和氧化锌晶须的加入可以明显提高氰酸酯树脂复合材料的热稳定性。 相似文献
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使用自行合成的环氧改性水性聚氨酯(EWPU)上浆剂对碳纤维进行表面处理,主要研究了EWPU上浆剂对碳纤维表面及碳纤维/氰酸酯树脂复合材料界面性能的影响。采用扫描电镜(SEM)、傅里叶红外光谱(FTIR)、X射线光电子能谱(XPS)和静态接触角等表征方法对比研究了二次上浆处理前碳纤维(CF)和处理后碳纤维(MCF)的表面形貌、表面化学元素组成和浸润性的变化,并通过单纤维破碎实验和短梁剪切法,研究了EWPU上浆剂对碳纤维/氰酸酯树脂复合材料界面力学性能的影响。结果表明,经EWPU上浆处理后碳纤维表面O/C值增加了39.13%,表面活性官能团的含量增加了14.97%,碳纤维与树脂的初始和稳态接触角分别减小了19.41%和20.59%,碳纤维/氰酸酯树脂复合材料的单丝界面剪切强度和层间剪切强度分别增加了13.42%和14.29%。 相似文献
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本文以硼酸铝晶须为增强剂,以4,5-环氧环己烷-1,2-二甲酸二缩水甘油酯(TDE-85),甲基纳狄克酸酐(MNA)、N,N’-二胺基二苯甲烷型双马来酰亚胺(BMI)/O,O′-二烯丙基双酚A(BA)体系分别作为基体制备晶须增强复合材料。研究了晶须对树脂的尺寸、表面处理方法、含量对树脂体系力学性能和热性能的影响;通过扫描电子显微镜(SEM)分析了浇注体的弯曲、冲击断口,研究晶须的增强机理。 相似文献
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A alumina borate whisker with Bi(OH)3 coating was prepared by a chemical method. The coated whiskers were sintered at various temperatures. The coated whisker-reinforced pure aluminum matrix composite was fabricated by squeeze casting method. The microstructures of the coated whiskers and coated composites with the different sintering temperature of whisker preform were studied, and the tensile properties of the coated composites at room temperature were also investigated. It can be found that the microstructures of coatings on the whisker surfaces and at the interface in the coated composites are strongly dependent on the sintering temperature of whisker preform. The ultimate tensile strength and elongation to fracture of the coated composites increased with the increasing of sintering temperature of the whisker preform. 相似文献
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As a new material, aluminum borate whisker reinforced aluminum composite has been considered for a wide range applications. However, addition of reinforcements to aluminum will change the corrosion behavior significantly. A pulsed YAG laser installation was used to produce surface treatment on Al18B4O33w/2024Al composite. Electrochemical method was used to study the corrosion resistance in 3.5% sodium chloride (NaCl) solution. The crystalline phases of the composites with and without laser surface treatment were analyzed using X-ray diffraction (XRD) measurement technique. The cross-section morphologies of the laser-treated composite were characterized by scanning electron microscope (SEM). Polarization experiments showed that the sensibility to pitting corrosion for the laser treated specimen was greatly lower than that of the untreated specimen. The reduction of reinforcement Al18B4O33 whisker and intermetallics CuAl2 on the surface of the laser-treated composite along with the formation of the homogeneous and defect free microstructure in the laser-modified layer led to improvement on the corrosion resistance of the laser-treated composite. 相似文献
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Multi-wall carbon nanotubes (MWNTs) have been considered a realistic kind of reinforcement for composite materials. In this paper, microstructure and mechanical properties of the aluminum borate whisker (ABOw) and MWNTs hybrid composites were investigated. The results show that MWNTs decrease the compressive deformation of the hybrid preforms and are kept intact in the matrix during squeeze cast processing. A small amount of MWNTs may effectively improve the modulus, strength and elongation of the hybrid composite. Decreasing micropores and strengthening the matrix, high strength MWNTs make the mechanical properties of the hybrid composite superior to the singularly reinforced ones. This makes MWNTs a promising material for novel micro/nanohybrid composite. 相似文献
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高温熔剂法制备硼酸铝晶须的研究 总被引:2,自引:0,他引:2
研究了高温熔剂法制行9Al2O3.2B2O3的方法,通过正交试验,利用方差和极并分析法对生长硼酸铝晶须的反应条件进行了优化,找出了生长硼酸铝晶须的最佳工艺条件。结果表明,在高温熔剂法制备肥的过程中,反应温度,氧化硼和氧化铝的摩尔配比及恒温时间为主要因素,并在最佳工艺条件下制得晶须的长经比50~100。 相似文献