Multi-functional environmental friendly biobased materials have attracted the attention due to the serious pollution caused by petroleum-based plastics. Lignin-containing nanocellulose (LCN), sodium alginate (SA) and ammonium polyphosphates (APP) have been directly added to polyvinyl alcohol (PVA) matrix to prepare flame retardant blends with excellent UV shielding properties. Compared with pure PVA, with the addition of LCN, PVA blends can almost 100 % shield the UVC, UVB and UVA light. The limiting oxygen index for combustion containing of the SA and APP increased from 18.19 % for unmodified PVA to 38.48 % (increased by 111.5 %). The burning intensity for the PVA blends is dramatically lower than that for PVA. They displayed self-extinguishing characteristics. The thermal stability from degradation of the blends was greater than that from unmodified PVA. In addition, the presume addition of SA enhanced the compatibility between APP and the PVA matrix. A green, simple and efficient way to produce biobased flame retardant materials with UV shielding ability has been demonstrated.

中文翻译：

---

含木质素的纳米纤维素/PVA 共混物，具有阻燃和紫外线屏蔽性能


多功能环保型生物基材料因石油基塑料造成的严重污染而受到关注。含木质素的纳米纤维素 （LCN）、海藻酸钠 （SA） 和聚磷酸铵 （APP） 已直接添加到聚乙烯醇 （PVA） 基质中，以制备具有优异紫外线屏蔽性能的阻燃混合物。与纯 PVA 相比，添加 LCN 后，PVA 混合物几乎可以 100% 屏蔽 UVC、UVB 和 UVA 光。SA 和 APP 的燃烧极限氧指数从未改性 PVA 的 18.19 % 增加到 38.48 %（增加了 111.5 %）。PVA 混合物的燃烧强度明显低于 PVA。它们表现出自熄的特性。共混物降解的热稳定性大于未改性的 PVA。此外，SA 的假定添加增强了 APP 与 PVA 矩阵之间的兼容性。已经展示了一种绿色、简单、高效的生产具有紫外线屏蔽能力的生物基阻燃材料的方法。