Mechanical properties of epoxy nanocomposites filled with melamine functionalized molybdenum disulfide.

Bin Chen,He-Xin Zhang,Keun-Byoung Yoon,Si-Yuan Liu,Qiu-Yang Ye,Bao-Jian Ni,Wen-Tao Liu

doi:10.1039/c8ra02689k

Abstract

In this work, a melamine functionalized molybdenum disulfide (M-MoS2) was prepared and used as fillers to form epoxy (EP)/MoS2 nanocomposites. The effects of molybdenum disulfide (MoS2) and melamine functionalized molybdenum disulfide (M-MoS2) loading on the mechanical properties of epoxy composites were investigated and compared. With only addition of 0.8 wt% M-MoS2, the tensile strength and modulus of EP/M-MoS2 nanocomposites showed 4.5 and 4.0 times increase over the neat epoxy. Interestingly, the elongation at break value of EP was also increased with the introduction of M-MoS2 fillers. These properties could result from the good dispersion and strong interfacial adhesion of M-MoS2 fillers and the EP matrix. Therefore, this work provides a facile way to produce of high-performance EP nanocomposites.

Highlights

EP resin is an important thermoset material extensively used in a wide variety of applications such as coatings,[1] adhesives,[2] laminate,[3] semiconductor encapsulate,[4] and resin matrix composites,[5] because of its excellent mechanical stiffness and toughness, low shrinkage, good chemical resistance and superior adhesive force to many substrates.[6,7,8,9,10] Up to now, great efforts have been conducted to improve the properties of EP resin through addition of nano llers, such as montmorillonite, polyhedral oligomeric silsesquioxanes, carbon nanotube, graphene.[11,12,13,14,15,16,17,18,19]Recently, transition metal dichalcogenides (TMDCs) have attracted great interest in a wide range of research elds.[20,21,22,23,24,25,26,27] MoS2 is one of the most typical TMDC.[28,29,30,31] A monolayer of MoS2 reportedly has an extraordinarily high breaking strength ($23 GPa) and Young's modulus ($300 GPa), which are greater than those of chemically reduced graphene.[32,33] Derived from these remarkable properties, the MoS2 sheets may hold considerable potential as a new EP resin reinforcement nano ller
This work provides a facile way to produce of high-performance EP nanocomposites
No characteristic peaks appear in the spectrum of bulk MoS2, whereas several sharp peaks are observed for the melamine-functionalized MoS2 (M-MoS2) sample

Summary

Introduction

EP resin is an important thermoset material extensively used in a wide variety of applications such as coatings,[1] adhesives,[2] laminate,[3] semiconductor encapsulate,[4] and resin matrix composites,[5] because of its excellent mechanical stiffness and toughness, low shrinkage, good chemical resistance and superior adhesive force to many substrates.[6,7,8,9,10] Up to now, great efforts have been conducted to improve the properties of EP resin through addition of nano llers, such as montmorillonite, polyhedral oligomeric silsesquioxanes, carbon nanotube, graphene.[11,12,13,14,15,16,17,18,19]Recently, transition metal dichalcogenides (TMDCs) have attracted great interest in a wide range of research elds.[20,21,22,23,24,25,26,27] MoS2 is one of the most typical TMDC.[28,29,30,31] A monolayer of MoS2 reportedly has an extraordinarily high breaking strength ($23 GPa) and Young's modulus ($300 GPa), which are greater than those of chemically reduced graphene.[32,33] Derived from these remarkable properties, the MoS2 sheets may hold considerable potential as a new EP resin reinforcement nano ller. In this research, we report a melamine functionalized MoS2 and further used as llers to reinforce the EP resin. In the rst step (380 C), the weight loss may be attributed to decomposition of the carbon formed on the MoS2 surface as a result of carbonization of melamine.

Results

Conclusion