Aramid Nanofiber Templated In Situ SNAr Polymerization for Maximizing the Performance of All-Organic Nanocomposites,ACS Macro Letters

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Aramid Nanofiber Templated In Situ SNAr Polymerization for Maximizing the Performance of All-Organic Nanocomposites
ACS Macro Letters ( IF 5.1 ) Pub Date : 2020-03-26 , DOI: 10.1021/acsmacrolett.0c00156
Seul-A Park ₁ , Youngho Eom _{1,

2} , Hyeonyeol Jeon ₁ , Jun Mo Koo ₁ , Taehyung Kim _{3,

4} , Jaemin Jeon ₅ , Moon Jeong Park ₅ , Sung Yeon Hwang _{1,

6} , Byeong-Su Kim ₃ , Dongyeop X Oh _{1,

6} , Jeyoung Park _{1,

6}

Affiliation

The performance limits of conventional super engineering plastics with inorganic nanofillers are surpassed by all-organic nanocomposites prepared via in situ S_NAr polymerization of polysulfone (PSU) in the presence of a highly dispersed aramid nanofiber (ANF) solution. The latter is directly used, bypassing the energy-consuming, nanostructure-damaging workup process. Using only a 0.15 wt % nanofiller, the all-organic nanocomposite shows an ultimate tensile strength 1.6× higher and 3.4× tougher than neat PSU and its blending counterpart due to the mutually interactive filler and maximally homogenized matrix. The exceptional toughness of the ANF/PSU nanocomposite originates from the grafted PSU on the surface of ANF; it drives stress-delocalized deformation, as revealed by stress-absorbable viscoelastic behavior and ductile elongation of materials. This material is a promising candidate for use as a filler-interactive, high-performance nanocomposite.

中文翻译：

芳纶纳米纤维模板化原位 SNAr 聚合以最大限度地提高全有机纳米复合材料的性能

_{通过原位 S N}制备的全有机纳米复合材料超越了传统超级工程塑料与无机纳米填料的性能极限在高度分散的芳纶纳米纤维 (ANF) 溶液存在下聚砜 (PSU) 的 Ar 聚合。后者直接使用，绕过了耗能、破坏纳米结构的后处理过程。仅使用 0.15 wt% 的纳米填料，全有机纳米复合材料的极限拉伸强度比纯 PSU 及其共混对应物高 1.6 倍，韧性高 3.4 倍，这是由于填料的相互作用和最大程度的均质化基质。ANF/PSU 纳米复合材料的非凡韧性源于 ANF 表面接枝的 PSU；它驱动应力离域变形，正如材料的应力可吸收粘弹性行为和延展性伸长所揭示的那样。这种材料是一种很有前途的候选材料，可用作填料相互作用的高性能纳米复合材料。

更新日期：2020-04-23

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