writer：Yuchun Li， Jinzhao Wang，Boqiong Xue，Shuheng Wang，Peng Qi，Jun Sun，Hongfei Li，Xiaoyu Gu，Sheng Zhang
keywords：碳纳米管负载超分子聚集体用于提升PA6的阻燃与抗光氧老化性能
source：期刊
specific source：Chemosphere
Issue time：2021年

  An integrated multi-functional additive was fabricated by successively grafting melamine (MEL) and phytic acid (PhA) on multiwalled carbon-nanotubes (MWNCTs), and was then applied in PA6 to improve the flame retardancy and light aging resistance of the composite. The limit oxygen index of PA6 composite containing 7 wt% PhA-MEL-MWCNTs was increased to 26.4 from 21.0. The smoke and CO release were significantly reduced by 48% and 88% respectively, and the severe melt dripping of PA6 in burning was eliminated. It is proved that PhA-MEL-MWCNTs can absorb ultraviolet (UV) radiation, and hence significantly reduces the mechanical property loss of the PA6 composite after UV aging. The tensile strength of the aged PA6/7 wt%PhA-MEL-MWCNTs composite sample only decreased by 18.1%, which was significantly lower than the loss rate of the control aged PA6 sample (62.5%). This protocol provides a new opportunity for fabricating long-life flame retardant polyamide composites.

  通过在多壁碳纳米管（MWNCTs）上依次接枝三聚氰胺（MEL）和植酸（PhA）制备了一种集成的多功能添加剂，然后将其应用于PA6以提高复合材料的阻燃性和耐光老化性。含有 7 wt% PhA-MEL-MWCNTs 的 PA6 复合材料的极限氧指数从 21.0 增加到 26.4。烟气和CO释放量分别显着降低48%和88%，消除了PA6燃烧过程中严重的熔滴现象。证明PhA-MEL-MWCNTs可以吸收紫外线（UV）辐射，从而显着降低UV老化后PA6复合材料的机械性能损失。老化后的 PA6/7 wt% PhA-MEL-MWCNTs 复合样品的拉伸强度仅降低了 18.1%，显着低于对照老化 PA6 样品的损失率 (62.5%)。该协议为制造长寿命阻燃聚酰胺复合材料提供了新的机会。

https://doi.org/10.1016/j.chemosphere.2021.132100