Abstract Dispersion quality of nanoparticles has always limited the performance of polymer nanocomposites and coatings. Herein, the main purpose is to improve the dispersion quality of nanoparticles and overall properties in polyvinylidene fluoride (PVDF)/polyhedral oligomeric silsesquioxane (POSS) nanocomposites fabricated through spray-coating technique. POSS was added to PVDF/DMF solution at varying concentrations. Based on morphological analysis, low to moderate contents (1 and 3 wt%) of POSS exhibited a good dispersion quality but the high contents (5 and 10 wt%) of POSS led to the formation of large aggregates. To improve the dispersion quality of POSS, tetrahydrofuran (THF) was used as co-solvent. The improved dispersion of POSS caused a significant enhancement in the crystallinity of PVDF from 29.8–59.5% according to the differential scanning calorimetry (DSC) results. X-ray diffraction results revealed that the majority of PVDF crystals from the α-type and addition of co-solvent led to the formation of a slight amount of γ phase which was confirmed by the multiple endotherms based on DSC results. The co-solvent addition also led to higher hydrophobicity due to the increased crystallinity. Overall, the use of a proper co-solvent led to better dispersion of nanoparticles which can result in improved performance of nanocomposite coatings.

中文翻译：

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使用四氢呋喃作为共溶剂改善聚偏二氟乙烯/POSS涂层中纳米颗粒的分散性和聚合物结晶度

摘要 纳米粒子的分散质量一直限制着聚合物纳米复合材料和涂层的性能。在此，主要目的是提高通过喷涂技术制备的聚偏二氟乙烯（PVDF）/多面体低聚倍半硅氧烷（POSS）纳米复合材料中纳米颗粒的分散质量和整体性能。将 POSS 以不同浓度添加到 PVDF/DMF 溶液中。根据形态分析，低至中等含量（1 和 3 wt%）的 POSS 表现出良好的分散质量，但高含量（5 和 10 wt%）的 POSS 导致形成大聚集体。为了提高 POSS 的分散质量，使用四氢呋喃 (THF) 作为共溶剂。POSS 分散度的提高导致 PVDF 的结晶度从 29.8-59 显着提高。5% 根据差示扫描量热法 (DSC) 结果。X 射线衍射结果表明，大部分来自 α 型的 PVDF 晶体和添加共溶剂导致少量 γ 相的形成，这通过基于 DSC 结果的多重吸热证实。由于增加的结晶度，共溶剂添加还导致更高的疏水性。总体而言，使用适当的共溶剂可以更好地分散纳米颗粒，从而提高纳米复合涂层的性能。由于增加的结晶度，共溶剂添加还导致更高的疏水性。总体而言，使用适当的共溶剂可以更好地分散纳米颗粒，从而提高纳米复合涂层的性能。由于增加的结晶度，共溶剂添加还导致更高的疏水性。总体而言，使用适当的共溶剂可以更好地分散纳米颗粒，从而提高纳米复合涂层的性能。