固定化漆酶介体系在竹塑复合材料界面改性中的作用机制

Mechanism of Immobilized Laccase-mediated Systems in Interfacial Modification of Bamboo-plastic Composites

采用固定化漆酶与多巴胺协同改性竹纤维,固定化漆酶催化氧化竹纤维表面形成活性位点,在竹纤维表面构筑了微纳米多尺度疏水结构,改善了竹纤维与聚β—羟基丁酸酯(PHB)的界面相容性,其制备的竹塑复合材料的冲击性能、拉伸性能和弯曲性能分别提升了23.10%、25.00%、29.14%。同时固定化技术能够克服漆酶回收困难的问题,经过两次改性竹纤维后的固定化漆酶酶活回收率达15.79%,实现竹塑复合界面生物酶促增容工作高效化、可循环化。

This study explores the use of magnetic materials for immobilizing laccase to modify bamboo fibers synergistically with dopamine.The immobilized laccase facilitates the oxidation of bamboo fiber surfaces,creating active sites and forming a micro-and nano-multiscale hydrophobic structure on the fibers.This modification enhances the interfacial compatibility between bamboo fibers and poly(β-hydroxybutyrate)(PHB),resulting in significant improvements in the impact,tensile,and flexural properties of bamboo-plastic composites by 23.10%,25.00%,and 29.14%,respectively.Additionally,the immobilization technology overcomes the challenge of laccase recovery difficulty,with a 15.79%increase in enzyme activity recovery rate after two modifications.This approach efficiently enhances the interfacial bio-enzymatic capacity and recyclability of bamboo-plastic composites.