Tannic acid (TA), natural phenolic compounds abundant in many plants, exhibit low flammability and good absorbility because of multidentate properties. Based on it, a novel intumescent flame retardant (IFR) system (AGT) that consists of ammonium polyphosphate (APP)/TA functionalized graphene (TGE) presents synergistic flame retardant and smoke suppression for natural rubber (NR) due to the dual flame retardant functions of each component. The novel IFR (AGT) system is of interest to a variety of fields because of its distinct flame retardant and relatively good mechanical properties in comparison to traditional IFR system. Cone calorimeter results reveal that the AGT system could clearly change the decomposition behavior of NR and form a strong a highly graphitized and phosphorous-containing carbonaceous structure char layer on the surface of the composites, consequently resulting in synergistic effects on the flame retardancy and smoke suppression properties. Moreover, TGE endows NR composite excellent mechanical properties within an effective additive mass of AGT system.

单宁酸（TA）是许多植物中丰富的天然酚类化合物，由于具有多齿特性，因此显示出低易燃性和良好的吸收性。在此基础上，由聚磷酸铵（APP）/ TA功能化石墨烯（TGE）组成的新型膨胀型阻燃（IFR）系统（AGT）由于具有双重阻燃性，因此对天然橡胶（NR）具有协同阻燃性和抑烟性每个组件的功能。小说国际财务报告准则 （AGT）与传统的IFR系统相比，该系统具有独特的阻燃性和相对良好的机械性能，因此在各个领域都受到关注。锥形量热仪结果表明，AGT系统可以明显改变NR的分解行为和形式一个强壮的在复合材料表面上形成高度石墨化且含磷的碳质结构炭层，因此对阻燃性和抑烟性产生协同作用。此外，TGE在有效添加量的AGT系统中赋予NR复合材料优异的机械性能。