Biocomposites based on polyethylene from renewable resources derived from sugar cane as raw material were modified with phosphonium ionic liquids. Mechanical properties and thermal behavior of modified biocomposites in air atmosphere were studied. The influence of ionic liquids (IL) on thermal degradation of biocomposites based on polyethylene from renewable resources was studied by thermogravimetric analysis (TGA). Three phosphonium ionic liquids containing phosphorus both in cation and anion segments were used. Biocomposites were filled with 10 wt% and 20 wt% hemp fiber. In general, modification of biocomposites reinforced with 20 wt% hemp fiber with phosphonium ionic liquids resulted in improvement of tensile properties, i.e. tensile strength, as well as impact strength and hardness, whereas Young’s modulus decreased compared to unmodified biocomposites. Thermal degradation of biocomposites modified with phosphonium ILs containing phosphate anion proceeds in two steps corresponding to overlapping processes of degradation of polymer matrix and decomposition of hemp fibers components. Conversely, biocomposites modified with ionic liquid based on phosphinate anion exhibit more complex degradation behaviour, as well as slightly enhanced thermal stability. It may indicate that anion segment of ionic liquids influences the thermal behavior of ILs modified biocomposites.

基于phospho的离子液体对基于聚乙烯的生物复合材料进行了改性，该复合材料来自以甘蔗为原料的可再生资源。研究了改性生物复合材料在空气中的力学性能和热行为。通过热重分析（TGA）研究了离子液体（IL）对可再生资源中基于聚乙烯的生物复合材料热降解的影响。使用了在阳离子链段和阴离子链段中都含有磷的三种liquid离子液体。用10wt％和20wt％的大麻纤维填充生物复合材料。通常，用phospho离子液体对用20 wt％的大麻纤维增强的生物复合材料进行改性可改善拉伸性能，即拉伸强度以及冲击强度和硬度，与未改性的生物复合材料相比，杨氏模量下降。用含磷酸根阴离子的phospho类ILs修饰的生物复合材料的热降解过程分为两个步骤，分别对应于聚合物基质降解和大麻纤维组分降解的重叠过程。相反，用基于次膦酸根阴离子的离子液体改性的生物复合材料表现出更复杂的降解行为，并且热稳定性略有提高。这可能表明离子液体的阴离子链段会影响ILs修饰的生物复合材料的热行为。用基于次膦酸根阴离子的离子液体改性的生物复合材料表现出更复杂的降解行为，并且热稳定性略有提高。这可能表明离子液体的阴离子链段会影响ILs修饰的生物复合材料的热行为。用基于次膦酸根阴离子的离子液体改性的生物复合材料表现出更复杂的降解行为，并且热稳定性略有提高。这可能表明离子液体的阴离子链段会影响ILs修饰的生物复合材料的热行为。