Cryogenic fracture behavior of epoxy reinforced by a novel graphene oxide/poly(p-phenylenediamine) hybrid

被引：44
作者：
Hussein, Abdelrahman [1 ]
Sarkar, Sourav [1 ]
Lee, Kwangju [2 ]
Kim, Byungki [1 ]
机构：
[1] Sch Mechatron Engn, 1600 Chungjeol Ro, Cheonan 31253, Chungnam, South Korea
[2] Korea Univ Technol & Educ, Sch Mech Engn, 1600 Chungjeol Ro, Cheonan 31253, Chungnam, South Korea
来源：
COMPOSITES PART B-ENGINEERING | 2017年 / 129卷
基金：
新加坡国家研究基金会;
关键词：
Nanocomposites; Graphene; Cryogenic temperature; Fracture toughness; MECHANICAL-PROPERTIES; TOUGHENING MECHANISMS; POLYMER COMPOSITES; THERMAL-PROPERTIES; TENSILE-STRENGTH; NANOCOMPOSITES; OXIDE; TEMPERATURE; MORPHOLOGY; TOUGHNESS;
D O I：
10.1016/j.compositesb.2017.07.085
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Epoxy polymers are actively used in high-end technological applications. However, a major drawback of epoxies is their brittle mechanical behavior especially at cryogenic temperatures. Here we report a novel filler (GO-PDA) of poly (p-phenylenediamine) (PDA) nano-sized particles attached to graphene oxide (GO) sheets. Chemical analysis showed the attachment of PDA particles to GO through amidation of carboxylic groups. Transmission electron microscopy showed that PDA particles are uniform and spherical of approximate to 70 nm in size. Selected area electron diffraction showed that these particles are crystalline. Mechanical properties of epoxy/GO-PDA composite are tested at 25 degrees C (RT) and 120 degrees C (CR) temperatures. Young's modulus was not remarkably affected by GO-PDA addition. However, strength, fracture strain and toughness showed improvement at relatively low GO-PDA wt%. Microstructural analysis of fractured surfaces showed that the fracture mechanism is dependent on testing temperature. GO-PDA has a very good strengthening and toughening effects for epoxy without compromising the modulus both at RT and CR . (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：133 / 142
页数：10
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