西北林学院学报2024，Vol.39Issue(5)：219-225,7.DOI:10.3969/j.issn.1001-7461.2024.05.27
聚多巴胺改性竹长纤维对环氧树脂基复合材料性能的影响
Effect of Bamboo Fiber Modified with Polydopamine on the Properties of Epoxy Resin Based Composites
摘要
Abstract
In order to enhance the interface compatibility between bamboo fiber and epoxy resin(EP),a high-performance bamboo fiber was developed.Polydopamine(PDA)modified bamboo fiber was formed by dopamine(DA)autopolymerization,and bamboo fiber/EP composite was prepared by hot pressing.The effects of synthetic conditions of PDA on the mechanical properties and wettability of EP-based composites were investigated by means of universal mechanical testing machine and surface tension measuring instru-ment.The results demonstrated that polydopamine-modified bamboo fiber with a pH value of 8.5 and a concentration of 2.0 g/L could increase the surface contact angle,reduce surface energy,as well as decrease polarity in both modified bamboo fiber composite material.FTIR and XPS analyses revealed an increased nitrogen content on the surface of modified bamboo fiber due to hydrogen bonding formed between catechol groups in dopamine's molecular structure and free hydroxyl groups in bamboo fibers,resulting in reduced water absorption by the composite material.XRD analysis indicated improved crystallinity in modified bamboo fibers.The bending strength,bending modulus,and impact strength were enhanced to 131.10 MPa,8 097.61 MPa,and 25.68 kJ/m2,respectively for the composite material after modification;these values were found to be higher than those observed for unmodified composites by 5.36％,18.8％,and 36％,re-spectively.DMA and TG tests showed that the energy storage modulus,loss modulus and thermal stability of the modified composite were enhanced.关键词
竹纤维/环氧树脂/复合材料/聚多巴胺Key words
bamboo fiber/epoxy resin/composite/polydopamine分类
通用工业技术引用本文复制引用
詹绍彬,熊燕英,余婷,刘晓辉,陈礼辉,周吓星..聚多巴胺改性竹长纤维对环氧树脂基复合材料性能的影响[J].西北林学院学报,2024,39(5):219-225,7.基金项目
十四五国家重点研发计划(2023YFD2201903) （2023YFD2201903）
福建省自然基金面上项目(2021J01099) （2021J01099）
福建农林大学科技创新专项基金(CXZX2019115S). （CXZX2019115S）
