Engineering chemistry of electrospun nanofibers and interfaces in nanocomposites for superior mechanical properties.
Engineering chemistry of electrospun nanofibers and interfaces in nanocomposites for superior mechanical properties.
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DOI：
10.1021/am100288r
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发表时间：
2010-06
影响因子：
9.5
通讯作者：
Elif Ozden;Y. Menceloğlu;M. Papila
中科院分区：
文献类型：
--
作者：
Elif Ozden;Y. Menceloğlu;M. Papila
这项工作的新奇是基于设计的电纺纳米纤维的化学，使所得的复合材料大大受益于纳米纤维和聚合物基体之间的交联。具体地，将内部合成的共聚物聚苯乙烯-共-甲基丙烯酸缩水甘油酯P（St-co-GMA）的溶液静电纺丝以产生表面反应性纳米至亚微米级纤维的垫，随后伴随着在乙二胺（EDA）上喷涂作为环氧树脂的补充交联剂。然后将P（St-co-GMA）/EDA纤维垫嵌入环氧树脂中。复合材料的三点弯曲模式分析表明，P（St-co-GMA）/EDA纳米纤维增强环氧树脂的储能模量分别比纯环氧树脂和P（St-co-GMA）纳米纤维增强环氧树脂高约10倍和2.5倍。尽管纳米纤维的重量分数低至2wt%。机械响应的显著增加归因于固有交联的纤维结构和静电纺丝纤维的表面改性/化学，其导致交联的聚合物基质-纤维界面结合。
The novelty of this work is based on designing the chemistry of the electrospun nanofibers, so that the resultant composites substantially benefit from cross-linking between the nanofibers and the polymer matrix. Specifically, the solution of in-house synthesized copolymers polystyrene-co-glycidyl methacrylate P(St-co-GMA) is electrospun to produce mats of surface reactive nano-to-submicron scale fibers that are accompanied later by spraying over the ethylenediamine (EDA) as a supplementary cross-linking agent for epoxy. The P(St-co-GMA)/EDA fiber mats are then embedded into an epoxy resin. Analysis of the three-point-bending mode of the composites reveals that the storage modulus of P(St-co-GMA)/EDA nanofiber-reinforced epoxy are about 10 and 2.5 times higher than that of neat and P(St-co-GMA) nanofiber-reinforced epoxy, respectively, even though the weight fraction of the nanofibers was as low as 2 wt %. The significant increase in the mechanical response is attributed to the inherently cross-linked fiber structure and the surface modification/chemistry of the electrospun fibers, that results in cross-linked polymer matrix-nanofiber interfacial bonding.