Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China; Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, China.
Key Laboratory of State Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650224, China.
Int J Biol Macromol. 2023 Sep 30;249:126018. doi: 10.1016/j.ijbiomac.2023.126018. Epub 2023 Jul 28.
In this study, a mild and eco-friendly synergistic treatment strategy was investigated to improve the interfacial compatibility of bamboo fibers with poly(lactic acid). The characterization results in terms of the chemical structure, surface morphology, thermal properties, and water resistance properties demonstrated a homogeneous dispersion and excellent interfacial compatibility of the treated composites. The excellent interfacial compatibility is due to multi-layered coating of bamboo fibers using synergistic treatment involving dilute alkali pretreatment, polydopamine coating and silane coupling agent modification. The composites obtained using the proposed synergistic treatment strategy exhibited excellent mechanical properties. Optimal mechanical properties were observed for composites with synergistically treated bamboo fiber mass proportion of 20 %. The tensile strength, elongation at break and tensile modulus of the treated composites were increased by 63.06 %, 183.04 % and 259.04 %, respectively, compared to the untreated composites. This synergistic treatment strategy and the remarkable performance of the treated composites have a wide range of applicability in bio-composites (such as industrial packaging, automotive lightweight interiors, and consumer goods).
在这项研究中，研究了一种温和且环保的协同处理策略，以改善竹纤维与聚乳酸的界面相容性。从化学结构、表面形态、热性能和耐水性等方面的特性分析结果表明，处理后的复合材料具有均匀的分散性和优异的界面相容性。这种优异的界面相容性归因于采用协同处理对竹纤维进行多层涂覆，协同处理包括稀碱预处理、聚多巴胺涂层和硅烷偶联剂改性。使用所提出的协同处理策略获得的复合材料表现出优异的机械性能。对于协同处理的竹纤维质量比例为 20%的复合材料，观察到最佳的机械性能。与未处理的复合材料相比，处理后的复合材料的拉伸强度、断裂伸长率和拉伸模量分别提高了 63.06%、183.04%和 259.04%。这种协同处理策略和处理后的复合材料的卓越性能在生物复合材料（如工业包装、汽车轻量级内饰和消费品）中有广泛的应用前景。
