Unique UV-resistant and surface active aramid fibers with simultaneously enhanced mechanical and thermal properties by chemically coating Ce0.8Ca0.2O1.8 having low photocatalytic activity

作者：Zhu, Xiaoling; Yuan, Li; Liang, Guozheng; Gu, Aijuan^*

来源：Journal of Materials Chemistry A, 2014, 2(29): 11286-11298.

DOI：10.1039/c4ta02060j

• INTERFACIAL BONDING STRENGTH
• GAMMA-RAY RADIATION
• CA-DOPED CEO2
• KEVLAR FIBER
• FUNCTIONALIZED GRAPHENE
• SHIELDING PROPERTIES
• PLASMA TREATMENT
• CARBON NANOTUBE
• COMPOSITES
• IMPACT

To conquer the inferior UV resistance and poor surface activity without sacrificing the outstanding integrated performance of aramid fiber (KF) is still a challenge. A series of unique modified KFs coated with CaO doped CeO2 (Ce0.8Ca0.2O1.8), Ce0.8Ca0.2O1.8@KF, were prepared, and their structures and properties were systematically investigated. Results show that the morphology of Ce0.8Ca0.2O1.8@KF can be controlled by adjusting the concentration of Ce0.8Ca0.2O1.8 coated on the surface of KF, so does the integrated performances of fibers; while the chemical and crystal structures of Ce0.8Ca0.2O1.8@KF are nearly the same as those of KF. Attractively, all Ce0.8Ca0.2O1.8@KFs not only have greatly improved UV-resistance and surface activity, but also exhibit enhanced mechanical and thermal properties. The surface free energies of Ce0.8Ca0.2O1.8@KFs are 1.2-1.4 times those of KFs; and the retentions of tenacity of Ce0.8Ca0.2O1.8@KFs after 168 h UV irradiation depend on the loading of Ce0.8Ca0.2O1.8 on the surface of KF, but all of them are as high as 88-95%. The origin behind this is intensively discussed. This investigation provides an effective method to overcome the bottle-necks of KFs.

• 出版日期2014
• 单位苏州大学