In the current study, huntite hydromagnesite (HH) was used as flame retardant additive in poly (lactic acid) (PLA) to produce green flame retardant composites. The effects of HH amount, particle size and surface modifications on the flame retardant, thermal and mechanical properties were investigated. The properties of the composites were investigated using limiting oxygen index (LOI), horizontal and vertical burning test (UL 94), mass loss calorimeter, thermogravimetric analysis, tensile test, impact test and dynamic mechanical analysis. According to results, the flame retardant PLA composites with different UL-94 ratings (HB, V2, V0) were produced. The LOI value increased as the added amount of HH increased. The highest LOI value of 34.2 was achieved with the addition of 60 wt% HH. Surface modifications had no remarkable effect on the flammability properties of the composites. The addition of HH reduced the tensile and impact strengths and improved the elastic modulus of the composites as the added amount of HH increased. The addition of HH with large particle size deteriorated the flammability properties and tensile strength despite of the increase in impact strength. Surface modifications improved the mechanical properties of the composites due to the improvement in interfacial adhesion between HH and PLA.

在当前的研究中，硅藻土水菱镁矿（HH）被用作聚（乳酸）（PLA）中的阻燃添加剂，以生产绿色阻燃复合材料。研究了HH量，粒径和表面改性对阻燃剂，热和机械性能的影响。使用极限氧指数（LOI），水平和垂直燃烧试验（UL 94），质量损失量热仪，热重分析，拉伸试验，冲击试验和动态力学分析研究了复合材料的性能。根据结果​​，制备了具有不同UL-94等级（HB，V2，V0）的阻燃PLA复合材料。LOH值随HH的添加量增加而增加。添加60 wt％的HH可获得34.2的最高LOI值。表面改性对复合材料的可燃性没有显着影响。随着HH的添加量增加，HH的添加降低了复合材料的拉伸强度和冲击强度，并提高了复合材料的弹性模量。尽管冲击强度增加，但添加大粒径的HH却使可燃性和拉伸强度恶化。由于HH和PLA之间的界面粘合性的改善，表面改性改善了复合材料的机械性能。尽管冲击强度增加，但添加大粒径的HH却使可燃性和拉伸强度恶化。由于HH和PLA之间的界面粘合性的改善，表面改性改善了复合材料的机械性能。尽管冲击强度增加，但添加大粒径的HH却使可燃性和拉伸强度恶化。由于HH和PLA之间的界面粘合性的改善，表面改性改善了复合材料的机械性能。