In Situ Thermal Reduction of Graphene Nanosheets Based Poly(methyl methacrylate) Nanocomposites with Effective Reinforcements
In Situ Thermal Reduction of Graphene Nanosheets Based Poly(methyl methacrylate) Nanocomposites with Effective Reinforcements
复制标题
DOI：
10.1021/ie5035978
复制
发表时间：
2015-01
影响因子：
4.2
通讯作者：
X. Sheng;Delong Xie;Wen-Rong Cai;Xinya Zhang;Li Zhong;Huiping Zhang
中科院分区：
文献类型：
--
作者：
X. Sheng;Delong Xie;Wen-Rong Cai;Xinya Zhang;Li Zhong;Huiping Zhang
将石墨烯纳米片（GNS）纳入聚合物基体中可以有效增强其热性能和机械性能。我们报道了一种简便且环保的方法，通过首先使用PMMA细乳液接枝功能化氧化石墨烯（GO），然后将接枝的GO与PMMA基体熔融共混，并同时在基体中原位热还原GO，在聚（甲基丙烯酸甲酯）（PMMA）基体中制备具有均匀分散的GNS的聚合物纳米复合材料。结果表明，GNSs 在所得纳米复合材料中表现出剥离形貌和良好的分布。通过仅加入 1.5 wt% 的 GNS，聚合物基体的拉伸强度提高了 37.9%，杨氏模量提高了 61.4%。实验得出的杨氏模量与理论模拟非常吻合。此外，当 GNSs 负载量为 1.5 wt% 时，纳米复合材料的储能模量增加了 45%，而玻璃化转变温度 (Tg) 增加了 7.5 °C。
The incorporation of graphene nanosheets (GNSs) into a polymer matrix can effectively enhance its thermal and mechanical properties. We report a facile and eco-friendly method for preparing polymer nanocomposites with homogeneously dispersed GNSs in the poly(methyl methacrylate) (PMMA) matrix via first grafting functionalized graphene oxide (GO) using PMMA miniemulsion, then melt blending the grafted GO with PMMA matrix, and simultaneous in situ thermal reduction of GO in the matrix. The results show that the GNSs exhibit exfoliated morphology and good distribution in the obtained nanocomposites. A 37.9% enhancement in tensile strength and a 61.4% increase of Young’s modulus with respect to the polymer matrix are achieved by incorporating only 1.5 wt % GNSs loading. The experimental derived Young’s modulus agrees well with the theoretical simulation. Moreover, the storage modulus of the nanocomposites increases by 45%, while the glass transition temperature (Tg) increases by 7.5 °C at 1.5 wt % GNSs loading.