含木质素纳米纤维素阻燃紫外屏蔽膜的制备与表征
Preparation and characterization of lignin-containing nanocellulose films with flame retardant and UV shielding properties
面对石油基塑料造成的严重污染，多功能的环保生物质塑料受到学者们的关注。本研究使用简单的“一锅法”将含木质素纳米纤维素(LCN)、海藻酸钠(SA)、聚磷酸铵(APP)直接添加到聚乙烯醇(PVA)基体中制备了具有优异阻燃性和紫外屏蔽性的复合膜。XPS、FTIR结果证明了SA/APP成功被引入到PVA膜中。与对照纯PVA膜相比，添加了LCN的薄膜对UVC、UVB和UVA的紫外屏蔽能力均达到近 100%;所制备阻燃改性紫外屏蔽膜的极限氧指数从 18.19%增加到 38.48%，燃烧强度明显减弱，且具有离火自熄的效果，且在热稳定性测试结果证明了薄膜的残余质量明显增加，900℃时残余质量高达29.7 0%;另外，还发现SA的添加可以改善APP与基质之间相容性差的问题。这为扩大PVA的应用范围和开发生物质基阻燃材料提供了一种绿色、简单、高效的思路。
In light of the significant environmental impact of petroleum-based plastics,scholars have directed their attention towards multifunctional and eco-friendly biomass plastics.In this study,lignin-containing nanocellulose(LCN),sodium alginate(SA),and ammonium polyphosphate(APP)were directly added into a polyvinyl alcohol(PVA)matrix by a simple one-pot method to prepare composite films with excellent flame retardancy and ultraviolet(UV)shielding properties.The XPS and FTIR results demonstrated that SA/APP was effectively incorporated into the PVA film.In comparison to the pure PVA film,the UV shielding ability of the LCN-added film against UVC,UVB,and UVA reached nearly 100%.Additionally,the ultimate oxygen index of the prepared flame-retardant modified UV shielding film was increased from 18.19%to 38.48%,increased by 111.5%.Additionally,the film exhibited a self-extinguishing effect when removed from the source of ignition.The results of the thermal stability test demonstrated a notable increase in the residual mass of the film,reaching 29.70%at 900 °C.Furthermore,it was discovered that the addition of SA could improve the poor compatibility between APP and the substrate.This offers a sustainable,straightforward,and effective approach for broadening the utilization of PVA and developing biomass-based flame retardant materials.
向璐;王又梅;齐锦秋;谢九龙;
四川农业大学林学院,四川 成都 611130##四川省教育部木材工业与家具工程重点实验室,北京 100084;四川农业大学林学院,四川 成都 611130##四川省教育部木材工业与家具工程重点实验室,北京 100084;四川农业大学林学院,四川 成都 611130##四川省教育部木材工业与家具工程重点实验室,北京 100084;四川农业大学林学院,四川 成都 611130##四川省教育部木材工业与家具工程重点实验室,北京 100084;
1512-1512 / 1
评论