用于改善聚乳酸复合材料界面相容性的竹纤维的仿生聚多巴胺沉积和硅烷接枝改性
Bioinspired polydopamine deposition and silane grafting modification of bamboo fiber for improved interface compatibility of poly (lactic acid) composites.
作者信息
Zhang Kaiqiang, Chen Zhenghao, Boukhir Mustapha, Song Wei, Zhang Shuangbao
机构信息
MOE Key Laboratory of Wooden Material Science and Application, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Wood Science and Engineering, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China; MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China.
International Centre for Bamboo and Rattan, Beijing 100102, China.
出版信息
Int J Biol Macromol. 2022 Mar 15;201:121-132. doi: 10.1016/j.ijbiomac.2021.12.119. Epub 2021 Dec 29.
The surface of bamboo fiber (BF) has poor interface compatibility with the surface of the poly (lactic acid) (PLA), which compromises composite performance. In this study, a bioinspired polydopamine (PDA) function coating was constructed on a BF surface to act as a bridge to introduce an epoxy-functionalized silane layer (KH560). The results of the test confirmed that KH560 was successfully grafted onto the surface of the BF. Therefore, the flexural, tensile, and impact strength of the modified composites increased by 37.22%, 49.64%, and 26.66%, respectively, compared with that of the untreated composites. Furthermore, the PDA-KH560-modified BF enhanced the PLA composites' thermal stability. This strategy is assumed to provide a simple and green method for improving interface adhesion strength and potentials for future manufacturing of high-performance composites.
竹纤维（BF）表面与聚乳酸（PLA）表面的界面相容性较差，这会影响复合材料的性能。在本研究中，在BF表面构建了一种受生物启发的聚多巴胺（PDA）功能涂层，作为引入环氧官能化硅烷层（KH560）的桥梁。测试结果证实KH560成功接枝到BF表面。因此，与未处理的复合材料相比，改性复合材料的弯曲强度、拉伸强度和冲击强度分别提高了37.22%、49.64%和26.66%。此外，PDA-KH560改性的BF提高了PLA复合材料的热稳定性。该策略被认为提供了一种简单且绿色的方法来提高界面粘合强度，并为未来高性能复合材料的制造提供了潜力。
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