KH-550改性纳米Al2O3增强芳纶纸性能的研究

Effect of Modified Nano- Al2O3 on Properties of Aramid Paper

关键词:  芳纶纸  硅烷偶联剂  纳米Al₂O₃  性能

Key Words:aramid paper  silicon coupling agent  nano- Al₂O₃  performance

摘要:采用不同用量的硅烷偶联剂（KH-550）对纳米Al₂O₃表面进行改性研究,采用红外光谱和粒度仪对改性前后纳米Al₂O₃进行表征；并考察了改性纳米Al₂O₃的用量对芳纶纸抗张强度、介电强度和紧度等性能的影响。结果表明,KH-550能够成功地对纳米Al₂O₃进行改性,并且有助于芳纶纸性能的增强。随着KH-550用量的增加,改性后的纳米Al₂O₃粒径有所减小；纳米Al₂O₃与KH-550最佳配比为5 g∶15 mL,改性纳米Al₂O₃用量为6%时,芳纶纸的抗张指数和介电强度分别提高了58.3%和37.0%,但纸张的紧度变化不明显。

Abstract:Nano- Al₂O₃ particles were modified with four different amount of silicon coupling agent KH-550 and the modified nano- Al₂O₃ particle size was measured. At the same time, the effects of addition amount of modified nano- Al₂O₃ on tensile strength, dielectric strength, tightness properties of aramid paper were studied. The tensile strength and dielectric strength of the aramid paper before and after adding nano- Al₂O₃ were compared. The results showed that the nano- Al₂O₃ particle size was reduced after modification. When the ratio of nano- Al₂O₃ and silicon coupling agent KH-550 was 5 g∶15 mL, the amount of modified nano- Al₂O₃ was 6%, the tensile strength of the paper increased by 58.3%, the dielectric strength increased by 37.0%, the paper tightness did not change significantly.