Natural seaweed microparticles obtained from Undaria pinnatifida waste (A) were used as fillers in thermoplastic starch (TPS)–chitosan (CH) blend in order to obtain microcomposites films for application in sustainable agriculture. The adequate proportion of both polymers was optimized with regards their mechanical, barrier, water interaction and morphological properties. Then, the effect of different content of seaweed on microcomposites properties was investigated. The seaweed used showed good interaction with the TPS–CH matrix. Its addition produced an increase in the tensile strength and a slight increase in the elongation at break. Contents of 10% of A lead to a more heterogeneous structure with the formation of aggregates. Low contents of A reduced the mobility of the polymer chains resulting in a lower moisture content and higher T_g, although the WVP increased with the content of A. The improvements achieved with microcomposites were finally discussed under the light of new agricultural mulch films regulations.

从裙带菜Undaria pinnatifida获得的天然海藻微粒废料（A）被用作热塑性淀粉（TPS）-壳聚糖（CH）共混物中的填充剂，以便获得可用于可持续农业的微复合膜。关于它们的机械，阻隔，水相互作用和形态特性，对两种聚合物的适当比例进行了优化。然后，研究了不同含量的海藻对微复合材料性能的影响。所用的海藻与TPS-CH基质表现出良好的相互作用。它的加入使抗张强度增加，断裂伸长率略有增加。含量为10％的A会导致形成聚集体的结构更加不均一。低含量的A会降低聚合物链的迁移率，从而导致较低的水分含量和较高的T _g，尽管WVP随着A含量的增加而增加。最后，根据新的农用覆盖膜法规对微复合材料的改进进行了讨论。