TY - Jour A2 - Roy，Sagar Au - Piotr，Szatkowski Au - Kinga，Pielichowska Au - Stanislaw，Blazewicz Py - 2020 DA - 2020/08/30 Ti - 自愈合聚氨酯基纳米复合材料改性用碳纤维和碳纳米管Sp改装- 4518512 VL - 2020 AB - Self-healing polyurethanes (PUs) were synthesized as a matrix of nanocomposites containing two fibrous carbon components, i.e., functionalized carbon nanotubes (CNF-OH) and short carbon fibers (CF). Two types of PUs differing in the content of flexible chain segments (40% and 50%) were used. Changes in mechanical strength were analyzed to assess the ability to self-healing of PU-based matrix nanocomposites with experimentally introduced damage in the form of an incision. The healing process was activated by heating the damaged samples at 60°C, for 30 minutes. The addition of CNT-OH and CF caused a slight reduction in the self-healing ability of the nanocomposites as compared to the neat PUs. After heating to 60°C, the nanocomposites self-healed up to 72% of the initial strength of the undamaged samples. The introduction of fibrous components to the polymer matrix improved the thermal conductivity of nanocomposites and facilitated heat transfer from the environment to the interior of the samples, necessary to initiate self-healing. Low content of carbon components in the PU matrix, i.e., 3 wt% of CF and 2 wt% of CNF-OH increased the total work up to fracture of samples after healing by about 53%. SN - 0730-6679 UR - https://doi.org/10.1155/2020/4518512 DO - 10.1155/2020/4518512 JF - Advances in Polymer Technology PB - Hindawi KW - ER -