Electrospinning provides a facile and versatile method for generating nanofibers from a large variety of starting materials, including polymers, ceramic, composites, and micro-/nanocolloids. In particular, incorporating functional nanoparticles (NPs) with polymeric materials endows the electrospun fibers/sheets with novel or better performance. This work evaluates the spinnability of polyacrylamide (PAAm) solution containing thermoresponsive poly(N-isopropylacrylamide-co-tert-butyl acrylate) microgel nanospheres (PNTs) prepared by colloid electrospinning. In the presence of a suitable weight ratio (1:4) of PAAm and PNTs, the in-fiber arrangements of PNTs-electrospun fibers will evolve into chain-like arrays and beads-on-string structures by confining of PAAm nanofibers, and then the free amide groups of PAAm can bind amide moieties on the surfaces of PNTs, resulting in the assembling of PNTs in the cores of PAAm fibers. The present work serves as a reference in the fabrication of novel thermoresponsive hybrid fibers involving functional nanospheres via electrospun packing. The prepared nanofibers with chain-like and thermoresponsive colloid arrays in the cores are expected to have potential application in various fields.

中文翻译：

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静电纺丝填充PAAm纳米纤维芯中软胶体阵列的结构演变和形成机理

电纺丝提供了一种从多种起始材料（包括聚合物，陶瓷，复合材料和微/纳米胶体）生产纳米纤维的便捷且通用的方法。特别地，将功能性纳米颗粒（NP）与聚合物材料结合在一起使电纺纤维/片材具有新颖或更好的性能。这项工作的计算结果的含热反应性聚（聚丙烯酰胺酰胺（PAAm）溶液纺丝性Ñ -isopropylacrylamide-共-叔胶体静电纺丝制备的丙烯酸丁酯微凝胶纳米球（PNT）。在适当重量比（1：4）的PAAm和PNT的存在下，通过限制PAAm纳米纤维，PNTs-电纺纤维的纤维内排列将演变成链状阵列和串珠状结构，然后PAAm的游离酰胺基可以结合PNTs表面的酰胺部分，导致PNTs在PAAm纤维芯中组装。本工作可作为通过电纺丝包装制备涉及功能纳米球的新型热敏性杂化纤维的参考。制备的在芯中具有链状和热响应性胶体阵列的纳米纤维有望在各个领域具有潜在的应用。