共查询到20条相似文献,搜索用时 9 毫秒
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利用原位复合法制备了聚苯胺(PANI/)/Fe3O4复合材料,运用紫外光谱、扫描电镜、四探针电阻率仪等测试方法研究了硅烷偶联剂KH-550对PANI/Fe3O4复合材料结构及性能的影响。结果表明:经KH-550处理后的PANI/Fe3O4复合材料的微粒不易团聚,其电导率比未经处理的PANI/Fe3O4复合材料高约1个数量级,且随热处理温度的升高,复合材料的电导率降低,由半导体变为绝缘体;KH-550影响PANI与Fe3O4之间的电荷作用,使复合材料的紫外光谱特征吸收峰产生了一定的位移。 相似文献
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硅烷偶联剂对龙岩高岭土表面改性的研究 总被引:1,自引:0,他引:1
采用硅烷偶联剂KH-540对龙岩高岭土进行表面改性处理,研究了偶联剂的用量、表面改性处理的pH值、改性温度、反应时间等因素对高岭土活化指数的影响。以高岭土在液体石蜡中的沉降体积和红外光谱(FT-IR)等手段研究了改性效果以及改性剂与高岭土之间的相互作用。结果表明,改性的最佳实验条件为:偶联剂用量为2%左右,改性pH在8~10,改性温度为60℃,反应时间40 min。高岭土经过活化处理后,在液体石蜡中的分散性和稳定性均得到明显提高;偶联剂与高岭土之间以化学键合作用为主。 相似文献
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本文通过处理液浸渍钠钙硅系统玻璃对其表面进行改性,采用ESCA研究了钠钙硅系统玻璃在表面改性前后其表面结构的变化。研究表明:钠钙硅系统玻璃在表面改性后其表面形成了一层有机物多分子层,由此探讨了钠钙硅系统玻璃表面改性的机理。 相似文献
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利用硅烷偶联剂KH550对热塑性聚氨酯胶膜(TPU)进行表面改性处理,通过红外光谱、表面接触角、可见光透过率、粘结强度等测试研究了偶联剂处理对TPU胶膜的结构和性能的影响.结果表明:改性后的TPU胶膜表面粗糙度增大,表面水接触角降低,由120.5°降至80.5°,胶膜表面活性、耐热稳定性和可见光透过率都有明显的提升.同时,胶膜对于复合玻璃(Glass/TPU/PC)的粘结强度有显著提高,当处理时间为5 min时效果最佳,粘结强度由改性前的2.02 MPa增大至5.63 MPa,提高了179%. 相似文献
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采用自制的淀粉纳米晶(SNC)对玻璃纤维进行表面处理,增加其与环氧树脂基体的界面剪切强度(IFSS)。研究了处理方式、处理时间、SNC乙醇分散液浓度、热处理温度等工艺参数对SNC在玻璃纤维表面沉积情况的影响,以及对改性玻璃纤维与环氧树脂的界面性能的影响规律。采用扫描电子显微镜、单纤维强力仪对处理前后玻璃纤维进行表征,并采用微脱粘法测试玻璃纤维与环氧树脂的界面粘结情况。结果表明,当重力静置处理时间24 h,SNC乙醇分散液浓度为1 g/100 m L时,SNC在玻璃纤维表面均匀沉积,且能显著提高玻璃纤维与环氧树脂的IFSS,为27.29 MPa,较未处理的纤维增加29.3%。150℃热处理4 h后,X射线光电子能谱结果显示SNC与玻璃纤维形成化学键合,进一步增加纤维与环氧树脂的界面粘结,IFSS值达到32.30 MPa,较未处理的纤维增加53%,且纤维的拉伸强度得到较好的维持。 相似文献
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Effect of Silane Coupling Agent on the Mechanical Properties of Clay Filled Styrene Butadiene Rubber
《Polymer-Plastics Technology and Engineering》2013,52(6):1159-1171
Abstract The effect of treatment of coupling agent [Bis (3-triethoxy-silyl-propyl) tetrasulphide] on mechanical properties of composites made from styrene butadiene rubber and clay is reported in this paper. The coupling agent in the form of solution (1.0%) was used for treatment of the filler. The treatment resulted in enhancement of mechanical properties of composites when compared with composites containing untreated clay. The properties under consideration were tensile strength, modulus at 100% and 400%, Young's modulus, hardness, etc. Good reinforcement was observed due to treatment of 1% coupling agent. Tensile strength was improved by 11%, modulus at 400% was found to improve by 237%, elongation at break was improved by 250%, while Young's modulus also was improved by 298% for treated clay composites, respectively, at 0.41 volume fraction when compared with untreated clay composites. 相似文献
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以3%氧化铝(Al2O3)或3种硅烷偶联剂表面修饰过的氧化铝为增强剂,采用高速混合与熔融挤出结合方法制备Al2O3/聚丙烯(PP)复合材料。研究硅烷表面修饰氧化铝对PP力学性能和耐热性能的影响。结果表明,采用硅烷偶联剂γ-巯丙基三甲氧基硅烷(KH590)对氧化铝表面修饰后,Al2O3/PP复合材料的性能得到改善。拉伸强度由33.80 MPa略降至32.63 MPa,冲击强度由14.58 kJ/m2增加至19.79 kJ/m2,拉伸模量由0.25 GPa增加至0.27 GPa,邵氏硬度D由75增加到84;同时Al2O3/PP复合材料的耐热性能有明显提高。 相似文献
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偶联剂表面改性Sb2O3的研究 总被引:2,自引:0,他引:2
研究了不同偶联剂表面改性Sb2O3的改性效果和条件,结果发现钛酸酯偶联剂NDZ-101的改性效果最佳,其最佳用量为1.0%与理论计算值相当;当改性时间大于30min,改性温度大于60℃,改性效果趋于稳定。 相似文献
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通过分级选取不同粒径的玻璃粉体,研究湿法对玻璃粉体表面改性的最佳条件,通过IR与TG-DSC分析,表明含20%水的乙醇溶液作为分散剂在70℃下进行实验得到的粉体表面改性效果较好,失重转变点出现在303℃(280~500目)与323℃(小于500目),较纯酒精243℃(280~500目)更高,终止点的温度也较高,其有机出峰也更为明显。同时研究表明粉体粒径粗细与表面改性结果成反比,随着粒径变小改性效果也更好,改性后的玻璃粉体在有机物质中分散比未改性玻璃粉体更为均匀,将改性后玻璃粉调配成浆料后的流动性下降,改性后的浆料流动时间均超过10 min。 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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M. Mukherjee G. Nayak S. Bose C. K. Das 《Polymer-Plastics Technology and Engineering》2013,52(11):1107-1112
Present study concentrates on the effect of silane coupling agent on the properties and dispersibility of multi-walled carbon nanotube (MWCNTs) in the Polycarbonate (PC)/Liquid Crystalline Polymer (LCP) system. Thermal stability of the PC/LCP/MWCNTs has been improved in an appreciable manner with the addition of silane coupling agents, as revealed from thermogravimetric analysis. Storage modulus also enhanced on addition of silane coupling agent into PC/LCP/MWCNTs systems. Field Emission Electron Microscopic study revealed finer morphology and substantial reduction of the LCP domain, indicating better compatibility between PC and LCP in the presence of a silane coupling agent. High Resolution Transmission Electron Microscopic study supports the unform dispersion of MWCNTs throughout the matrix in the presence of a silane coupling agent. 相似文献