Malik Sharali, Ruddock Felicite M, Dowling Adam H, Byrne Kevin, Schmitt Wolfgang, Khalakhan Ivan, Nemoto Yoshihiro, Guo Hongxuan, Shrestha Lok Kumar, Ariga Katsuhiko, Hill Jonathan P
Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany.
Department of Civil Engineering, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, United Kingdom.
Beilstein J Nanotechnol. 2018 Mar 5;9:801-808. doi: 10.3762/bjnano.9.73. eCollection 2018.
Pure graphene in the form of few-layer graphene (FLG) - 1 to 6 layers - is biocompatible and non-cytotoxic. This makes FLG an ideal material to incorporate into dental polymers to increase their strength and durability. It is well known that graphene has high mechanical strength and has been shown to enhance the mechanical, physical and chemical properties of biomaterials. However, for commercial applicability, methods to produce larger than lab-scale quantities of graphene are required. Here, we present a simple method to make large quantities of FLG starting with commercially available multi-layer graphene (MLG). This FLG material was then used to fabricate graphene dental-polymer composites. The resultant graphene-modified composites show that low concentrations of graphene (ca. 0.2 wt %) lead to enhanced performance improvement in physio-mechanical properties - the mean compressive strength increased by 27% and the mean compressive modulus increased by 22%. Herein we report a new, cheap and simple method to make large quantities of few-layer graphene which was then incorporated into a common dental polymer to fabricate graphene-composites which shows very promising mechanical properties.
几层石墨烯（FLG）形式的纯石墨烯——1至6层——具有生物相容性且无细胞毒性。这使得FLG成为一种理想的材料，可融入牙科聚合物中以提高其强度和耐久性。众所周知，石墨烯具有高机械强度，并且已被证明能增强生物材料的机械、物理和化学性能。然而，为了实现商业应用，需要有生产大于实验室规模数量石墨烯的方法。在此，我们展示了一种从市售多层石墨烯（MLG）出发制备大量FLG的简单方法。然后将这种FLG材料用于制造石墨烯牙科聚合物复合材料。所得的石墨烯改性复合材料表明，低浓度的石墨烯（约0.2 wt%）会使物理机械性能得到显著改善——平均抗压强度提高了27%，平均压缩模量提高了22%。在此我们报告一种新的、廉价且简单的方法来制备大量的几层石墨烯，然后将其融入一种常见的牙科聚合物中以制造出具有非常有前景的机械性能的石墨烯复合材料。
