EMAA/CNT膜对复合材料Ⅱ型层间断裂韧性及自修复率的影响

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (2): 25-31.

EMAA/CNT膜对复合材料Ⅱ型层间断裂韧性及自修复率的影响

高雅, 刘玲^*

同济大学航空航天与力学学院复合材料与结构研究所,上海200092

收稿日期:2019-06-14 出版日期:2020-02-28 发布日期:2020-02-28
通讯作者: 刘玲(1973-),女,博士,教授,主要从事复合材料与结构、纳米复合材料方面的研究,lingliu@tongji.edu.cn。
作者简介:高雅(1993-),女,硕士研究生,主要从事复合材料方面的研究。
基金资助:
国家自然科学基金(11772233)

EFFECT OF EMAA/CNT FILMS ON THE MODE Ⅱ INTERLAMINAR FRACTURE TOUGHNESSAND SELF-HEALING EFFICIENCY OF COMPOSITE MATERIALS

GAO Ya, LIU Ling^*

School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China

Received:2019-06-14 Online:2020-02-28 Published:2020-02-28

摘要/Abstract

摘要： 纤维增强树脂基复合材料的典型结构之一为层合结构,较弱的层间性能引起的分层是层合结构失效破坏的主要因素。本文首先采用聚乙烯甲基丙烯酸(EMAA)和碳纳米管(CNT)制备了无孔实心膜和多孔夹芯膜两种EMAA/CNT复合薄膜。然后,将两种复合薄膜分别引入玻璃纤维/环氧层合板的中间界面,研究其对Ⅱ型层间断裂韧性(G_ⅡC)的增韧效果和对Ⅱ型裂纹的自修复性能。结果表明:多孔EMAA/CNT夹芯膜具有较佳的增韧和修复性能,相比纯玻璃纤维/环氧的空白试样,多孔EMAA/CNT夹芯膜增强板的G_ⅡC提高了19.6%,并且通过热激励修复后其G_ⅡC的修复率为92.5%;而无孔EMAA/CNT实心膜增强板的G_ⅡC降低了27.5%,其G_ⅡC的修复率为81.8%。微观表征表明,多孔夹芯膜与环氧在层间形成均匀的结构,从而起到良好的增韧和修复作用。

关键词: 聚乙烯甲基丙烯酸(EMAA), 碳纳米管(CNT), Ⅱ型层间断裂韧性, 自修复

Abstract: Laminated structure is a major structure of fiber reinforced plastics, and delamination caused by weak interlaminar properties will cause a final failure to the laminates. In this paper, poly (ethylene-co-methacrylic acid) (EMAA) and carbon nanotube (CNT) are used to prepare two kinds of EMAA/CNT composite films, i.e., solid and porous membranes. Then, these two films were respectively introduced into the middle interface of glass fiber/epoxy laminates, and how the films affected the mode Ⅱ interlaminar fracture toughness (G_ⅡC) and its self-healing were studied. The results show that porous EMAA/CNT film has better toughening and self-healing properties. Compared with the glass fiber/epoxy blank laminate, porous EMAA/CNT film improves the G_ⅡC by 19.6%, which can be recovered to 92.5% after thermally self-healing. However, solid EMAA/CNT film would decrease the G_ⅡC by 27.5%, although the self-healing efficiency is 81.8%. Microscopic characterization shows that uniform distribution of the porous EMAA/CNT and epoxy at interlaminar interface plays a positive role in toughening and self-healing.

Key words: poly (ethylene-co-methacrylic acid) (EMAA), carbon nanotube (CNT), mode Ⅱ interlaminar fracture toughness, self-healing

中图分类号:

TB332

高雅, 刘玲. EMAA/CNT膜对复合材料Ⅱ型层间断裂韧性及自修复率的影响[J]. 复合材料科学与工程, 2020, 0(2): 25-31.

GAO Ya, LIU Ling. EFFECT OF EMAA/CNT FILMS ON THE MODE Ⅱ INTERLAMINAR FRACTURE TOUGHNESSAND SELF-HEALING EFFICIENCY OF COMPOSITE MATERIALS[J]. Composites Science and Engineering, 2020, 0(2): 25-31.

参考文献

[1] 缪钱江, 方征平, 蔡国平. 自修复复合材料研究进展. 材料科学与工程学报, 2004, 22(2): 149-151.
[2] Yanagisawa Y, Nan Y, Okuro K, et al. Mechanically robust, readily repairable polymers via tailored noncovalent cross-linking. Science, 2018, 359(6371): 72-76.
[3] 董慧民, 益小苏, 安学锋, 等. 纤维增强热固性聚合物基复合材料层间增韧研究进展. 复合材料学报, 2014, 31(2): 273-285.
[4] Shen Z, Bateman S, Wu D Y, et al. The effects of carbon nanotubes on mechanical and thermal properties of woven glass fibre reinforced polyamide-6 nanocomposites. Composites Science & Technology, 2009, 69(2): 239-244.
[5] Lau K T, Hui D. Effectiveness of using carbon nanotubes as nano-reinforcements for advanced composite structures. Carbon, 2002, 40(9): 1605-1606.
[6] Lau K T, Shi S Q. Failure mechanisms of carbon nanotube/epoxy composites pretreated in different temperature environments. Carbon, 2002, 40(15): 2965-2968.
[7] 方征平, 王建国, 顾嫒娟, 等. 胺功能化多壁碳纳米管/环氧树脂复合材料的研究//全国高分子材料科学与工程研讨会.
2006.
[8] 周毅文, 刘玲, 杨乔馨. 功能化MWCNTs网格/环氧树脂复合材料的制备及性能. 复合材料学报, 2014, 31(4): 866-872.
[9] Liu L, Shen L L, Zhou Y X. Improving the interlaminar fracture toughness of carbon/epoxy laminates by directly incorporating with porous CNT buckypaper. Journal of reinforced plastics and composites, 2016, 35(2): 165-176.
[10] Cohades A, Branfoot C, Rae S, et al. Progress in self-healing fiber-reinforced polymer composites. Adv Mater Interfaces, 2018, 5(17): 1800177.
[11] Zako M, Takano N. Intelligent material systems using epoxy particles to repair microcracks and delamination damage in GFRP. Journal of Intelligent Material Systems & Structures, 1999, 10(10): 836-841.
[12] Hayes S A, Zhang W, Branthwaite M, et al. Self-healing of damage in fibre-reinforced polymer-matrix composites. Journal of the Royal Society Interface, 2007, 4(13): 381.
[13] Meure S, Dong Y W, Furman S. Polyethylene-co-methacrylic acid healing agents for mendable epoxy resins. ActaMaterialia, 2009, 57(14): 4312-4320.
[14] Sam M, Scott F, Sarah K. Poly ethylene-co-(methacrylic acid) healing agents for mendable carbon fiber laminates. Macromolecular Materials & Engineering, 2010, 295(5): 420-424.
[15] Varley R J, Parn G P. Thermally activated healing in a mendable resin using a non woven EMAA fabric. Composites Science & Technology, 2012, 72(3): 453-460.
[16] Varley R J, Craze D A, Mouritz A P, et al. Thermoplastic healing in epoxy networks: exploring performance and mechanism of alter-native healing agents. Macromolecular Materials & Engineering, 2013, 298(11).
[17] Pingkarawat K, Bhat T, Craze D A, et al. Healing of carbon fibre-epoxy composites using thermoplastic additives. Polymer Chemistry, 2013, 4(18): 5007-5015.
[18] Pingkarawat K, Dell′Olio, Varley R J, et al. An efficient healing agent for high temperature epoxy composites based upon tetra-glyci-dyldiaminodiphenylmethane. Composites Part A Applied Science and Manufacturing, 2015, 78: 201-210.
[19] Pingkarawat K,Dell′Olio,Varley R J, et al. Poly(ethylene-co-methacrylic acid) (EMAA) as an efficient healing agent for high performance epoxy networks using diglycidyl ether of bisphenol A (DGEBA). Polymer, 2016, 92: 153-163.
[20] 张泽平, 容敏智, 章明秋. 基于可逆共价化学的交联聚合物加工成型研究-聚合物工程发展的新挑战. 高分子学报, 2018, (7): 829-852.