Thermal Mending of Electroactive Carbon/Epoxy Laminates Using a Porous Poly(ε-caprolactone) Electrospun Mesh.
Thermal Mending of Electroactive Carbon/Epoxy Laminates Using a Porous Poly(ε-caprolactone) Electrospun Mesh.
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DOI：
10.3390/polym13162723
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发表时间：
2021-08-14
期刊：
影响因子：
5
通讯作者：
Pegoretti A
中科院分区：
文献类型：
--
作者：
Cescato R;Rigotti D;Mahmood H;Dorigato A;Pegoretti A
首次将聚己内酯(ε)多孔网状物直接电纺到碳纤维(CF)层上，并用于制备具有电激活自愈合性能的新型结构环氧(EP)复合材料。制备了三个样品，即纯EP/CF复合材料和两个含有限量PCL(即5wt.%和10wt.%)的层合板，并从微观结构和热机械角度对其进行了表征。PCL网状物的引入降低了弯曲应力(17%)、层间剪切强度(15%)和层间剪切强度(39%)。在模式I下评估了所制备层合板的层间断裂韧性，并通过样品内部通过焦耳效应的电流产生的电阻加热在80°C(即，高于PCL的熔化温度)对断裂样品进行了热修复。结果表明，由于电纺PCL网的存在，PCL含量为10wt.%的层合板的愈合效率高达31%。
For the first time, a porous mesh of poly(ε-caprolactone) (PCL) was electrospun directly onto carbon fiber (CF) plies and used to develop novel structural epoxy (EP) composites with electro-activated self-healing properties. Three samples, i.e., the neat EP/CF composite and two laminates containing a limited amount of PCL (i.e., 5 wt.% and 10 wt.%), were prepared and characterized from a microstructural and thermo-mechanical point of view. The introduction of the PCL mesh led to a reduction in the flexural stress at break (by 17%), of the interlaminar shear strength (by 15%), and of the interlaminar shear strength (by 39%). The interlaminar fracture toughness of the prepared laminates was evaluated under mode I, and broken samples were thermally mended at 80 °C (i.e., above the melting temperature of PCL) by resistive heating generated by a current flow within the samples through Joule’s effect. It was demonstrated that, thanks to the presence of the electrospun PCL mesh, the laminate with a PCL of 10 wt.% showed healing efficiency values up to 31%.
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