Polydopamine with additional bioderived flame retardants was used as coatings for flexible polyurethane foam and triple-wall corrugated cardboard. Clay was used to prevent the foam from collapsing during combustion. Dopamine can also effectively intercalate clay to produce well-distributed coatings, so it was used in all coatings. Scanning electron microscopy was used to examine the morphology of the coatings. The amount of polydopamine coating applied to clay platelets and the morphology of the aggregates formed were greatly affected by the catalyzing base used. Amine-containing bases produced the largest aggregates and gaseous ammonia was found to be an effective base. The ability to form intumescing coatings was crucial for achieving good flame protection. Microcombustion calorimetry, flame-spread and cone calorimetry experiments revealed that (aminomethyl)phosphonic acid and glycine phytate produce intumescing chars that, in combination with montmorillonite clays, form a protective barrier for both foam and cardboard. The added flame retardants were also important for reducing the smoldering propensity of cardboard after flame extinguishment.

中文翻译：

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膨胀型聚多巴胺防火涂料

聚多巴胺和其他生物衍生的阻燃剂用作柔性聚氨酯泡沫和三层瓦楞纸板的涂料。粘土用于防止泡沫在燃烧过程中塌陷。多巴胺还可以有效地插入粘土中，以产生分布均匀的涂料，因此它被用于所有涂料中。扫描电子显微镜用于检查涂层的形态。施加到粘土片上的聚多巴胺涂层的量和形成的聚集体的形态受所用催化碱的影响很大。含胺的碱产生最大的聚集体，并且发现气态氨是有效的碱。形成膨胀涂层的能力对于获得良好的火焰防护至关重要。微燃烧量热法 火焰扩散和锥形量热法实验表明，（氨基甲基）膦酸和甘氨酸肌醇六磷酸产生膨胀炭，与蒙脱石粘土一起形成泡沫和纸板的保护层。添加的阻燃剂对于降低灭火后纸板的闷烧倾向也很重要。