School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China.
School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, PR China.
Int J Biol Macromol. 2024 Nov;281(Pt 2):136908. doi: 10.1016/j.ijbiomac.2024.136908. Epub 2024 Oct 26.
PTDF is prepared by a convenient ionic reaction of phytic acid, terephthalic dihydrazide and iron salts in water. It is a new type of high efficiency flame retardant. PTDF has high phosphorus and nitrogen content and good thermal stability, which can effectively improve the flame retardancy of PLA. PTFE is an anti-drip agent and is often used to improve the flame retardancy of PLA together with flame retardants. The addition of 4 wt% PTDF and 0.1 wt% PTFE made PLA reach V-0 flame retardant grade from non-flame retardant, and the oxygen index increased from 19.5 % to 24.5 %. With the increase of PTDF content, the performance of PLA improved significantly. The peak heat release rate (PHRR) and THR of PLA/6PTDF composites decrease by 27.4 % and 16.2 %, respectively, and the flame retardant index FRI increase by 232 %, showing excellent flame retardant efficiency. 6 wt% PTDF can increase the crystallinity of PLA by 25.9 %, tensile strength, maximum force required for impact fracture and notch impact strength by 12 %, 37 % and 129 %, respectively, and effectively improve the mechanical properties and toughness of the composite. The bio-based flame-retardant PLA/PTDF composites reported in this paper can be applied to office equipment.
PTDF 通过植酸、对苯二甲酸二酰肼和铁盐在水中的方便离子反应制备而成，是一种新型高效阻燃剂。PTDF 具有高磷、高氮含量和良好的热稳定性，能有效提高 PLA 的阻燃性。PTFE 是一种抗滴落剂，常与阻燃剂一起用于提高 PLA 的阻燃性。添加 4wt% PTDF 和 0.1wt% PTFE 可使 PLA 从非阻燃级别达到 V-0 阻燃级别，氧指数从 19.5%提高到 24.5%。随着 PTDF 含量的增加，PLA 的性能显著提高。PLA/6PTDF 复合材料的峰值热释放率（PHRR）和总热释放量（THR）分别降低了 27.4%和 16.2%，阻燃指数（FRI）提高了 232%，表现出优异的阻燃效率。6wt% PTDF 可使 PLA 的结晶度提高 25.9%，拉伸强度、冲击断裂所需的最大力和缺口冲击强度分别提高 12%、37%和 129%，有效提高了复合材料的力学性能和韧性。本文报道的生物基阻燃 PLA/PTDF 复合材料可应用于办公设备。
