ANF/TiO2机械力化学复合对芳纶纳米复合纸抗紫外老化性能的影响

Fabrication of TiO2/ANF Composite Based on Mechanochemical Effect and Its Effect on the UV-resistance of Aramid Nanopaper

关键词:  芳纶纳米纤维  纳米TiO₂  机械力化学  抗紫外性能  纸张强度

Key Words:aramid nanofiber  nano-TiO₂  mechanochemistry  UV-resistance  paper strength

摘要:以芳纶纳米纤维（ANF）和纳米TiO₂为原料，基于机械力化学原理，采用超声共混法或球磨复合法实现ANF与纳米TiO₂复合，制备出具有优异抗紫外和强度性能的芳纶纳米复合纸（以下简称复合纸），探究了复合方法和纳米TiO₂添加量对复合纸抗紫外老化性能与强度性能的影响。结果表明，与传统的超声共混法相比，采用球磨复合法有利于改善ANF与纳米TiO₂的界面结合。当纳米TiO₂添加量为6%时，球磨法制备的复合纸断裂应力70.13 MPa，与未添加纳米TiO₂复合纸相比，纸张断裂应力提高了12%；同时，紫外老化后，该复合纸强度保留率为81.5%，与超声共混法相比提高了15.8个百分点。随着纳米TiO₂添加量的提高，球磨复合法制备的复合纸抗紫外老化性能改善效果更加明显。

Abstract:Aramid nanofiber/nano-TiO₂ composite paper with excellent mechanical strength and UV-resistance ability was fabricated by ultrasound blending or ball milling to mix aramid nanofiber and nano-TiO₂ based on mechanochemical mechanism. The effects of preparation method and nano-TiO₂ dosage on the strength and UV-resistance of the composite paper were investigated. The results showed that compared with traditional method of ultra-sound blending， ball milling could enhance the interface bonding between ANF and nano-TiO₂. When nano-TiO₂ dosage was 6%， the strength of paper fabricated by ball milling was 70.13 MPa， which was increased by 12% compared with that of paper made by ultra-sound blending. In addition， the strength retention rate of the composite paper made by ball milling was 81.5%， which was increased by 15.8 percentage points compared with the sample made by ultra-sound blending. The UV-resistance of the composite paper made by ball milling was also enhanced with increasing the dosage of nano-TiO₂.