Achieving high performance corrosion and wear resistant epoxy coatings via incorporation of noncovalent functionalized graphene
Achieving high performance corrosion and wear resistant epoxy coatings via incorporation of noncovalent functionalized graphene
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DOI：
10.1016/j.carbon.2016.12.044
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发表时间：
2017-04-01
期刊：
影响因子：
10.9
通讯作者：
Xue, Qunji
中科院分区：
文献类型：
--
作者：
Chen, Cheng;Qiu, Shihui;Xue, Qunji
石墨烯（G）基聚合物纳米复合材料由于其比聚合物优越的上级物理化学性能而引起了人们极大的兴趣。然而，石墨烯片聚集的趋势使得难以实现在聚合物基质中的均匀分散。本文中，通过利用聚（2-丁基苯胺）（P2BA）作为分散剂，通过P2BA与石墨烯纳米片之间的非共价π-π相互作用实现石墨烯在有机溶剂中的稳定分散。然后通过环氧树脂与P2BA官能化的石墨烯（P2BA-G）和胺硬化剂的固化反应将剥离的石墨烯纳米片与涂层基质整合。将少量分散良好的石墨烯纳米片（P2BA（0.5%）-G（0.5%））嵌入环氧树脂涂层中，可显著提高环氧树脂涂层的防腐性能和耐磨性能，这是由于P2BA的氧化还原催化能力、石墨烯纳米片在环氧树脂基体中的高力学性能和阻隔性能的协同作用。本研究为开发具有上级物理机械性能的石墨烯增强有机涂层提供了一种有前途的策略。(C)2016爱思唯尔有限公司版权所有
Graphene(G)-based polymer nanocomposites have attracted great interest owing to their superior physicochemical properties over polymers. However, the tendency of graphene sheets to aggregate makes it difficult to achieve homogenous dispersion in polymer matrix. Herein, by utilization of poly(2-butylaniline) (P2BA) as a dispersing agent, stable dispersion of graphene in organic solvents was achieved via non-covalent pi-pi interactions between P2BA and graphene nanosheets. The exfoliated graphene nanosheets were then integrated with coating matrix by curing reaction of epoxy resin with P2BA functionalized graphene (P2BA-G) and amine hardener. Embedding a small percentage of well-dispersed graphene nanosheets (P2BA(0.5%)-G(0.5%)) in epoxy coating remarkably improved anticorrosion performance and wear resistance properties, which was attributed to the synergistic effects of the redox catalytic capability of P2BA, high mechanical and barrier properties of well-dispersed graphene nanosheets in the epoxy matrix. The present study provides a promise strategy for development of graphene reinforced organic coatings with superior physical-mechanical properties for metal protection. (C) 2016 Elsevier Ltd. All rights reserved.