Vahabi Henri, Michely Laurent, Moradkhani Ghane, Akbari Vahideh, Cochez Marianne, Vagner Christelle, Renard Estelle, Saeb Mohammad Reza, Langlois Valérie
Université de Lorraine, CentraleSupélec, LMOPS, F-57000 Metz, France.
Laboratoire Matériaux Optiques, Photoniques et Systèmes, CentraleSupélec, Université Paris-Saclay, 57070 Metz, France.
Materials (Basel). 2019 Jul 11;12(14):2239. doi: 10.3390/ma12142239.
A series of samples based on poly(3-hydroxybutyrate) (PHB) containing five different additives were prepared and their thermal stability and flammability were discussed. The samples first underwent flammability screening by using Pyrolysis Combustion Flow Calorimeter (PCFC) analyses. Then, four samples were selected for further investigations. PHB composites containing sepiolite (Sep.) inorganic nanofiller, and also organic ammonium polyphosphate (APP) were examined for flammability and thermal behavior using PCFC, thermogravimetric analysis (TGA), flame test, and Differential Scanning Calorimetry (DSC) analyses. Moreover, burning behavior of samples were captured on a digital camera to give a deeper sense of their flammability character for comparison. The results revealed a significant improvement of flammability and thermal stability of composites, particularly in the presence of sepiolite with respect to the value obtained for unfilled PHB. Regarding TGA results, the char residue yield was increased to ca. 20.0 wt.% in the presence of sepiolite, while 0.0 wt.% was observed for PHB. PCFC measurements uncovered higher performance of PHB-Sep. sample as signaled by 40% reduction in the peak of heat release rate with respect to PHB. According to observations, PHB-Sep. sample showed non-dripping behavior with high capacity of charring in the presence of Sep. in a vertical flame test.
制备了一系列基于聚（3-羟基丁酸酯）（PHB）并含有五种不同添加剂的样品，并讨论了它们的热稳定性和可燃性。首先使用热解燃烧流动量热仪（PCFC）分析对样品进行可燃性筛选。然后，选择了四个样品进行进一步研究。使用PCFC、热重分析（TGA）、燃烧试验和差示扫描量热法（DSC）分析，对含有海泡石（Sep.）无机纳米填料以及有机聚磷酸铵（APP）的PHB复合材料的可燃性和热行为进行了研究。此外，用数码相机捕捉样品的燃烧行为，以便更深入地了解它们的可燃性特征以进行比较。结果表明，复合材料的可燃性和热稳定性有显著提高，特别是在存在海泡石的情况下，相对于未填充PHB所获得的值。关于TGA结果，在存在海泡石的情况下，焦炭残留产率增加到约20.0 wt.%，而PHB的焦炭残留产率为0.0 wt.%。PCFC测量结果表明，PHB-Sep.样品具有更高的性能，相对于PHB，其热释放速率峰值降低了40%。根据观察结果，在垂直燃烧试验中，PHB-Sep.样品在存在海泡石的情况下表现出不滴落行为且具有高炭化能力。
