Abstract：
A facial strategy of co-deposition is proposed to enhance the interfacial bonding in wood fiber (WF)/polylactic acid (PLA) composites. Dopamine or tannic acid (TA) was co-deposited with 3-aminopropyltriethoxysilane (APTES) onto the WF surface to create active coatings. These coatings were formed through Michael addition and Schiff base reactions and effectively attached to the WF through a combination of hydrogen and covalent bonding. Such active coatings facilitated the connection between WF and PLA through both covalent bonds and physical entanglements, thereby enhancing the interfacial interactions and compatibility between the two components. The co-deposition of TA with APTES was found to be more effective than with dopamine, leading to a dramatic improvement in the tensile strength and elongation at break of the composites by 33.4 % and 185.9 %, respectively. This work offers a facile method to prepare high performance plant fiber reinforced PLA composites, thereby broadening the potential applications of PLA.
摘要：
提出了一种共沉积的面部策略，以增强木纤维（WF）/聚乳酸（PLA）复合材料的界面结合。将多巴胺或单宁酸(TA)与3-氨基丙基三乙氧基硅烷(APTES)共沉积到WF表面上以产生活性涂层。这些涂层是通过迈克尔加成和席夫碱反应形成的，并通过氢和共价键合的组合有效地连接到WF上。这种活性涂层通过共价键和物理缠结促进了WF和PLA之间的连接，从而增强两种组分之间的界面相互作用和相容性。发现TA与APTES的共沉积比多巴胺更有效，导致复合材料的拉伸强度和断裂伸长率显著提高33.4%和185.9%，分别。这项工作提供了一种简单的方法来制备高性能植物纤维增强PLA复合材料，从而拓宽了PLA的潜在应用。
