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Influences of porous reduction graphene oxide/molybdenum disulfide as filler on dielectric properties, thermal stability, and mechanical properties of natural rubber
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2021-08-13 , DOI: 10.1002/vnl.21857 Hongwei Pan 1 , Zhaokun Wang 1 , Yongyin Cui 1 , Lan Cao 1 , Chengzhong Zong 1
Journal of Vinyl and Additive Technology ( IF 3.8 ) Pub Date : 2021-08-13 , DOI: 10.1002/vnl.21857 Hongwei Pan 1 , Zhaokun Wang 1 , Yongyin Cui 1 , Lan Cao 1 , Chengzhong Zong 1
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A ternary composite system consisting of natural rubber (NR), porous reduced graphene oxide (rPGO), and molybdenum disulfide (MoS2) was introduced for applying in the dielectric field, of which rPGO and MoS2 hybrid conductive filler (rPGM) was prepared by an effective and environmentally friendly method-microwave reduction. And the well-dispersed NR composites (NGM) were made by the latex co-precipitation method. Due to the large specific surface area of rPGM itself and the synergistic dispersion of rPGO and MoS2, it formed many stable interface structures with the NR matrix, which not only made the blend exhibit high elasticity and withstood large deformation as NR but also greatly improved the dielectric, mechanical and thermal stability of the NR matrix. Compared with neat NR, the dielectric constant of nanocomposite increased by 11 times in the presence of rPGM conductive filler, and the leakage current generated by direct contact of fillers was reduced due to the attachment of MoS2 to the surface of rPGO; when 2% rPGM was added, the NR exhibited the highest tensile strength (21.3 MPa), elongation at break (495%), and abrasion resistance (0.165 cm−3); in addition, the thermal stability of the nanocomposite was also improved. These phenomena indicate that rPGM had great potential in conductive fillers and provided a reliable way for NR applications in the field of dielectric elastomers.
中文翻译：
多孔还原氧化石墨烯/二硫化钼填料对天然橡胶介电性能、热稳定性和力学性能的影响
介绍了一种由天然橡胶（NR）、多孔还原氧化石墨烯（rPGO）和二硫化钼（MoS 2）组成的三元复合体系应用于介电领域，其中制备了rPGO和MoS 2混合导电填料（rPGM）通过一种有效且环保的方法——微波还原。并且通过乳胶共沉淀法制备了分散良好的NR复合材料（NGM）。由于 rPGM 本身的大比表面积以及 rPGO 和 MoS 2的协同分散,它与NR基体形成了许多稳定的界面结构，不仅使共混物表现出与NR一样的高弹性和大变形能力，而且大大提高了NR基体的介电、机械和热稳定性。与纯NR相比，在rPGM导电填料的存在下，纳米复合材料的介电常数提高了11倍，由于MoS 2附着在rPGO表面，填料直接接触产生的漏电流降低；当添加 2% rPGM 时，NR 表现出最高的拉伸强度 (21.3 MPa)、断裂伸长率 (495%) 和耐磨性 (0.165 cm -3); 此外，纳米复合材料的热稳定性也有所提高。这些现象表明，rPGM 在导电填料方面具有巨大的潜力，为 NR 在介电弹性体领域的应用提供了可靠的途径。
更新日期：2021-08-13
中文翻译：
多孔还原氧化石墨烯/二硫化钼填料对天然橡胶介电性能、热稳定性和力学性能的影响
介绍了一种由天然橡胶（NR）、多孔还原氧化石墨烯（rPGO）和二硫化钼（MoS 2）组成的三元复合体系应用于介电领域，其中制备了rPGO和MoS 2混合导电填料（rPGM）通过一种有效且环保的方法——微波还原。并且通过乳胶共沉淀法制备了分散良好的NR复合材料（NGM）。由于 rPGM 本身的大比表面积以及 rPGO 和 MoS 2的协同分散,它与NR基体形成了许多稳定的界面结构，不仅使共混物表现出与NR一样的高弹性和大变形能力，而且大大提高了NR基体的介电、机械和热稳定性。与纯NR相比，在rPGM导电填料的存在下，纳米复合材料的介电常数提高了11倍，由于MoS 2附着在rPGO表面，填料直接接触产生的漏电流降低；当添加 2% rPGM 时，NR 表现出最高的拉伸强度 (21.3 MPa)、断裂伸长率 (495%) 和耐磨性 (0.165 cm -3); 此外，纳米复合材料的热稳定性也有所提高。这些现象表明，rPGM 在导电填料方面具有巨大的潜力，为 NR 在介电弹性体领域的应用提供了可靠的途径。
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