Graphene/cellulose nanocomposite paper with high electrical and mechanical performances
Graphene/cellulose nanocomposite paper with high electrical and mechanical performances
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DOI：
10.1039/c1jm12134k
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发表时间：
2011-01-01
影响因子：
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通讯作者：
Seppala, Jukka
中科院分区：
文献类型：
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作者：
Nguyen Dang Luong;Pahimanolis, Nikolaos;Seppala, Jukka
将氧化还原石墨烯(RGO)与胺改性纳米纤维(A-NFC)很好地结合在一起，制备了具有高机械和电学性能的石墨烯/纤维素纳米复合纸。通过调节GO含量，得到了石墨烯含量为0.1~10wt%的各种石墨烯/纤维素纳米复合材料。用该方法制备的RGO/A-NFC纳米复合材料的电渗流阈值为0.3wt%，电导率为4.79×10~(-4)S m(-1)，远高于抗静电值。此外，在石墨烯含量为10wt%时，测得该纳米复合材料的电导率为71.8S m(-1)。此外，当石墨烯的加入量仅为0.3wt%时，抗张强度分别比纯纤维素和氧化石墨烯纸提高1.2倍和2.3倍，显示出良好的石墨烯增强效果。含石墨烯的复合材料的断裂伸长率为8.5%，与A-NFC纸相近，远高于GO纸。值得一提的是，当石墨烯含量为5wt%时，RGO/A-NFC复合纸的抗张强度显著提高，达到273 Mpa，分别是纤维素纸和氧化石墨烯纸的1.4倍和2.8倍。在碳基材料/纤维素复合纸中，石墨烯对纤维素纸的电气和机械性能具有如此高的增强作用，这在以前还没有报道过。
Graphene/cellulose nanocomposite paper with high mechanical and electrical performances was reported in this study by combining reduced graphene oxide sheets (RGO) and amine-modified nanofibrillated cellulose (A-NFC) in a well-controlled manner. By adjusting the GO content, various graphene/cellulose nanocomposites with 0.1-10 wt% content of graphene were obtained. The RGO/A-NFC nanocomposite synthesized by the developed method exhibits an electrical percolation threshold of 0.3 wt% with an electrical conductivity of 4.79 x 10(-4) S m(-1), which is well above the antistatic value. Furthermore, with 10 wt% of graphene, a high conductivity of 71.8 S m(-1) was measured for the nanocomposite. Moreover, it was found that on addition of only 0.3 wt% of graphene, the tensile strength increased by 1.2 fold and 2.3 folds compared to that of the neat cellulose and graphene oxide paper, respectively, revealing an excellent reinforcement of graphene sheets. Moreover, the elongation at break of the composite with graphene content was 8.5%, which is similar to that of A-NFC paper and much higher than that of GO paper. It is noteworthy to mention that with 5 wt% of graphene, the RGO/A-NFC composite paper showed a significantly enhanced tensile strength of 273 MPa that is 1.4 fold and 2.8 folds higher than that of the cellulose papers and graphene oxide paper, respectively. Such a high enhancement of electrical and mechanical properties in cellulose paper by graphene has never been reported before for any carbon-based material/cellulose composite paper.