共查询到19条相似文献,搜索用时 171 毫秒
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为了研究玄武岩纤维掺量对泡沫玻璃性能的影响,以粉煤灰、玻璃粉、玄武岩纤维及外加剂制备泡沫玻璃,分析不同掺量下玄武岩纤维对泡沫玻璃物理性能、力学性能和导热系数的影响。研究结果表明:随着玄武岩纤维掺量的增加,泡沫玻璃的表观密度、导热系数呈递增趋势,当玄武岩纤维掺量为3‰-4‰时,表观密度变化较为平缓;当玄武岩纤维掺量为1‰时,导热系数达到0.0631 W/(m·K),当玄武岩纤维掺量在1‰-5‰时,对泡沫玻璃的含水率、吸水率影响较小,分别维持在0.35%、15%左右;当玄武岩纤维的掺量在1‰-4‰时,泡沫玻璃的抗压、抗折强度逐渐增大,掺量在4‰时,试样的抗压、抗折强度达到8.28 MPa和0.75 MPa,相比于基准试样,分别提高了2.24倍和1.92倍。 相似文献
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玄武岩纤维增强混凝土力学性能的研究 总被引:2,自引:0,他引:2
本文研究了单掺玄武岩纤维及玄武岩纤维与粉煤灰复合对混凝土力学性能的影响.结果表明,掺0.05%~0.15%的玄武岩纤维对混凝土抗压强度的改善不明显,但可以明显提高混凝土的抗折和劈裂抗拉强度;当玄武岩纤维掺量为0.10%时,与基准混凝土相比,混凝土的28 d拉压比提高了27.2%,且当纤维掺量为0.15%时,混凝土28 d折压比提高13.5%,即玄武岩纤维掺入到混凝土中能降低混凝土的脆性,提高其韧性和抗裂性;同时,当适量的玄武岩纤维和粉煤灰复合,能进一步提高玄武岩纤维混凝土的力学性能. 相似文献
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采用真空辅助成型工艺(VARI)制备连续玄武岩纤维增强木材复合材料,通过测试其力学性能,分析了平纹6×6、平纹9×9、斜纹6×6、斜纹9×9等四种不同类型玄武岩织物的增强效果,结果显示平纹6×6玄武岩纤维布增强木材复合材料的综合力学性能最优。 相似文献
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设计了一种具有较高强度、同时兼有良好电磁波屏蔽功能的复合板,该复合板以普通PVC板为基体,以高强度的Fe78Si13B9非晶态合金薄带状材料(简称非晶带材)作为增强材料。对Fe78Si13B9非晶带材和复合板的力学性能研究表明,非晶带材内部应力分布严重不均匀,在拉伸过程中始终处于弹性变形阶段,拉伸强度为1400—1500MPa;与PVC板相比,随着非晶带材铺层数的增加,复合板的拉伸强度和弯曲强度显著上升。复合板以4层非晶带材为宜,其拉伸强度为42MPa,较PVC板提高了130%,复合板的弯曲强度达54MPa,比PVC板的弯曲强度提高了1倍以上。 相似文献
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采用高能激光束对玄武岩纤维进行表面改性,并制备玄武岩纤维/环氧树脂复合材料。利用扫描电镜、原子力显微镜、X射线衍射等手段,表征改性前后玄武岩纤维的微观形态、物相结构,系统研究了激光对纤维的微观组织变化、性能等影响规律,并测试了玄武岩纤维/环氧树脂复合材料的力学性能。研究结果表明,随着激光功率的增加,玄武岩纤维表面缺陷深度和缺陷面积增加。当激光功率由0 W提高至120 W时,表面缺陷最大深度由9 nm增加至180 nm,表面缺陷的分布范围由3.5~6.5 nm增加至90~120 nm,表面粗糙度由1.41 nm增加至24.70 nm。激光改性后,玄武岩纤维单丝拉伸性能降低,由于激光对纤维的辐射作用,玄武岩纤维的表面缺陷深度与拉伸强度的关系不符合经典理论。激光改性前后,玄武岩纤维XRD谱峰位基本一致,表面所含元素的种类没有发生变化。激光改性使玄武岩纤维/环氧树脂复合材料的力学性能有所改善,随着激光功率的增加,复合材料的拉伸强度和冲击强度呈先升高后降低的趋势。 相似文献
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《Polymer Composites》2017,38(12):2798-2805
The thermoplastic matrix composites have gained great importance in last three decades. The chopped basalt fiber (mineral fiber) is considered to be a good fiber due to excellent properties as potential reinforcement of composite materials. In this work, composites of chopped basalt fiber (6 mm) with thermoplastic material Nylon‐6 (Polyamide‐6) were prepared and its mechanical and morphological properties were evaluated for automobile applications. The melt blending was carried out in corotating twin‐screw extruder and injection‐molded test samples were prepared for the analysis. The test samples of composite without coupling agent prepared by varying the loading of basalt fiber content of 5%, 10%, 15%, 20%, and 25% by weight and with coupling agent composite loading of Nylon‐6 and basalt fiber content were kept constant and the coupling agent (PE‐g‐MA) loading were changed as 1, 2, 3, 4, and 5 phr. The Mechanical and SEM properties were evaluated. From the test results, it was observed that the mechanical properties were improved with increasing coupling agent ratio. SEM images show good dispersion and adhesion of matrix and reinforcement. POLYM. COMPOS., 38:2798–2805, 2017. © 2015 Society of Plastics Engineers 相似文献
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制备出了短切碳纤维增强TDE-85环氧树脂复合材料,研究了碳纤维的含量对复合材料力学性能和耐热性能的影响。结果表明,碳纤维的加入有利于复合材料力学性能和耐热性能的提高,并在碳纤维含量为0.25%时,复合材料的拉伸强度、冲击韧性、弯曲强度和弯曲模量达到最大,分别提高了29.33%、25.31%、30.28%和68.93%。此外,对复合材料的弯曲断裂面进行了微观形貌分析,结果表明一定量的碳纤维可以较好地分散在树脂基体中,同时,碳纤维原丝和树脂基体的界面结合比较弱,主要依赖于两相之间的物理嵌合。 相似文献
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掺加聚乙烯醇(PVA)纤维、玄武岩纤维(BF)及混杂纤维(PVA纤维与BF)对脱硫石膏基复合胶凝材料性能进行改性,研究纤维复合材料的力学性能、耐水性能及耐干湿性能;应用电镜扫描技术对复合材料的微观形貌进行观察,探讨纤维对脱硫石膏基复合胶凝材料的影响机制。结果表明:PVA纤维掺量为1.5%时复合材料力学性能较好,试样的绝干抗折强度和绝干抗压强度较空白组分别提升了92.55%和32.62%;混杂纤维掺量为0.9%时耐水性能较好,试样的抗折软化系数较空白组提升了46.60%、吸水率低至13.87%;混杂纤维掺量为0.6%时耐干湿性能较优,干湿强度系数较空白组提升了50.74%。 相似文献
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直接成纤法芳纶-Ⅱ短纤维形态和性能的研究 总被引:3,自引:1,他引:2
利用聚对苯二甲酰对苯二胺(芳纶-Ⅱ树脂)的聚合物凝胶,在聚合的环境下就地直接成纤的方法制备了芳纶-Ⅱ短纤维。研究了在直接成纤法中,芳纶-Ⅱ树脂的对数比浓粘度(η_(inb))与所制备的短纤维的长度和长径比之间的关系;建立了用短纤维一环氧树脂复合材料的性能表征短纤维性能的方法。在此基础上进一步研究了短纤维的长度和长径比对其性能的影响.结果表明,利用直接成纤法,由η_(inh)≥3.5dL/g的聚合物凝胶可以制备性能较好、适用于复合材料应用的芳纶-Ⅱ短纤维。 相似文献
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Mohammed Saleh Didem Demir Yasin Ozay Mutlu Yalvac Nimet Bolgen Nadir Dizge 《应用聚合物科学杂志》2021,138(25):50599
In this study, a novel basalt embedded fiber membranes was prepared by the electrospinning method. The effects of the feed rate, voltage, tip to collector distance, and the basalt content on the prepared composite fiber membranes were investigated and optimized using the response surface method. Four models were built to compare the fibers in terms of deionized water flux (DWF), activated sludge flux, chemical oxygen demand (COD) removal, and porosity of fiber membranes. All the developed models were significant and adequately precise. The maximum flux of DWF was obtained when the voltage was 17.25 kV, the tip to collector distance of 19 cm, and a basalt content in polymer of 1.25%. COD removal decreased at higher voltage values as the feed rate increased. The porosity, pore size, and the contact angle values decreased for basalt embedded fiber membrane. The increases in the basalt percentage in polymer increased the hydrophilicity of the fiber. The flux decline for the basalt embedded fiber membrane was compared with the pristine fiber membrane. The permeate fluxes of pristine and basalt embedded fiber membranes were 42.3 and 59.6 L/m2/h, respectively. The biofouling performances of pristine and basalt embedded fiber membranes were also examined. Irreversible fouling decreased from 42.9% to 8.0%, and reversible fouling increased from 56.5% to 91.1% after modification of the membrane with basalt powder. Scanning electron microscopy with energy dispersive X-ray analysis (SEM–EDX) analysis showed that basalt powder was successfully embedded into polyether sulfone polymer. 相似文献