Enhanced interfacial properties of carbon fibers reinforced epoxy or PP composites using modified graphene oxide with two different polymer brushes

IF 2.4 3区 化学 Q3 POLYMER SCIENCE
Haifeng Cui, Qing Zhang, Huihuang Ma, Xiaodong Zhou
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引用次数: 0

Abstract

Carbon fibers (CFs) can usually only be used to reinforce polar (or non-polar) resins, and if they are to be used for reinforcing with another polymer type, they need to be surface-modified, which will inevitably damage the surface of the carbon fibers and thus reduces the overall performance of the composite. In this work, graphene oxide was first prepared and modified, and then two polymer brushes, polystyrene (PS) and hydroxypropyl polyacrylate (PHPA) were grafted onto its surface in a one-step process. This approach reduced the damage caused to the CFs surface by multiple treatments and improved the interfacial adhesion between CFs and different resin matrices. An electrophoretic deposition method was used to deposit the modified GO on the surface of CFs, which can form strong interaction between CFs and a variety of resins. The results showed that different molecular chains have been grafted on the surface of GO, and then the latter was uniformly deposited on the surface of CFs, improving their surface toughness. Additionally, when the suspension concentration was only 1 mg/mL, the interfacial shear strength (IFSS) of CF/epoxy and CF/PP increased by 52.0% and 26.5%, respectively. This means that a small amount of GO can significantly improve the interfacial properties of carbon fiber reinforced composites (CFRCs). Therefore, they can be applied to aerospace, wind energy and other industries to effectively improve the interfacial bonding between fiber and resin, after surface modification.

Graphical abstract

Abstract Image

Abstract Image

使用改性氧化石墨烯与两种不同聚合物刷增强碳纤维增强环氧树脂或聚丙烯复合材料的界面性能
碳纤维(CF)通常只能用于增强极性(或非极性)树脂,如果要用于增强其他类型的聚合物,则需要对其进行表面改性,这将不可避免地损坏碳纤维的表面,从而降低复合材料的整体性能。在这项工作中,首先制备并改性了氧化石墨烯,然后一步法将聚苯乙烯(PS)和聚丙烯酸羟丙酯(PHPA)两种聚合物刷接枝到氧化石墨烯表面。这种方法减少了多次处理对 CF 表面造成的损害,并改善了 CF 与不同树脂基质之间的界面粘附性。采用电泳沉积法在 CF 表面沉积改性 GO,可使 CF 与多种树脂之间形成较强的相互作用。结果表明,GO 表面接枝了不同的分子链,然后将后者均匀地沉积在 CFs 表面,从而提高了 CFs 的表面韧性。此外,当悬浮液浓度仅为 1 毫克/毫升时,CF/环氧树脂和 CF/PP 的界面剪切强度(IFSS)分别提高了 52.0% 和 26.5%。这说明,少量的 GO 就能显著改善碳纤维增强复合材料(CFRC)的界面性能。因此,它们可以应用于航空航天、风能等行业,在表面改性后有效改善纤维与树脂之间的界面粘结。
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来源期刊
Iranian Polymer Journal
Iranian Polymer Journal 化学-高分子科学
CiteScore
4.90
自引率
9.70%
发文量
107
审稿时长
2.8 months
期刊介绍: Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.
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