Ionic Liquid-Graphene Oxide for Strengthening Microwave Curing Epoxy Composites,ACS Applied Nano Materials

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Ionic Liquid-Graphene Oxide for Strengthening Microwave Curing Epoxy Composites
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-11-24 , DOI: 10.1021/acsanm.0c02511
Ke Shi ₁ , Jintao Luo ₁ , Xianhua Huan ₁ , Song Lin ₂ , Xin Liu ₁ , Xiaolong Jia _{1,

3} , Lei Zu ₄ , Qing Cai ₁ , Xiaoping Yang _{1,

3}

Affiliation

The challenge for fully exerting the excellent nature of graphene oxide (GO) within polymer composites was to realize its uniform dispersion and strong interfacial bonding in the polymer matrix through an efficient surface reduction approach. In this work, via the in situ activation effect of microwaves (MWs), a butyl glycidyl ether-modified ionic liquid (BIL)-GO hybrid was successfully synthesized at an ultrafast speed by introducing BIL into the two-dimensional lamellar structure of GO through chemically induced intercalation and noncovalent functions. Both GO and BIL components of BIL-GO had the positive synergism in absorbing MWs, which contributed much to enhancing its dispersibility in the epoxy (EP) matrix as compared with pristine GO. Superior to GO-filled systems, BIL-GO/EP composites showed lower activation energies (E_a1 and E_a2 reduced by 11.2 and 17.3%, respectively) over the range of cure following inside-out solidification modes because of the introduction of BIL because uniformly dispersed BIL-GO with exfoliated interlayers acted as trap centers of MWs. Additionally, BIL-GO/EP composites possessed a 22.1% increase in the strength of the transverse fiber bundle test over that of GO/EP composites, indicating better BIL-GO/EP interfacial bonding. The obtained results manifested that the advantageous effect of BIL through the in situ activation of MWs was to enhance the interface stress transfer and form a uniform BIL-GO network, thereby significantly enhancing the mechanical, thermal, and electrical properties of BIL-GO composites.

中文翻译：

离子液体石墨烯氧化物用于增强微波固化环氧树脂复合材料

在聚合物复合材料中充分发挥氧化石墨烯（GO）优良性能的挑战是通过有效的表面还原方法实现其在聚合物基质中的均匀分散和牢固的界面结合。在这项工作中，通过微波的原位活化作用，通过将BIL引入到GO的二维层状结构中，成功地以超快的速度成功合成了丁基缩水甘油醚改性的离子液体（BIL）-GO杂化物。化学诱导的嵌入和非共价功能。与原始GO相比，BIL-GO的GO和BIL组分在吸收MW方面都具有积极的协同作用，这有助于提高其在环氧（EP）基质中的分散性。优于GO填充系统，BIL-GO / EP复合材料显示出较低的活化能（在从内而外的固化模式下，固化范围内的E _a1和E _a2分别降低了11.2％和17.3％，这是因为引入了BIL，因为带有剥离夹层的均匀分散的BIL-GO充当了MWs的捕获中心。另外，与GO / EP复合材料相比，BIL-GO / EP复合材料的横向纤维束测试强度提高了22.1％，表明BIL-GO / EP界面粘合性更好。获得的结果表明，BIL通过原位活化MWs的有利作用是增强界面应力传递并形成均匀的BIL-GO网络，从而显着增强BIL-GO复合材料的机械，热和电性能。

更新日期：2020-12-24

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