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首页> 外文期刊>ACS applied materials & interfaces >In Situ Synthesis of Monomer Casting Nylon-6/Graphene-Polysiloxane Nanocomposites: Intercalation Structure, Synergistic Reinforcing, and Friction-Reducing Effect
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In Situ Synthesis of Monomer Casting Nylon-6/Graphene-Polysiloxane Nanocomposites: Intercalation Structure, Synergistic Reinforcing, and Friction-Reducing Effect

机译：原位合成单体浇铸尼龙-6 /石墨烯 - 聚硅氧烷纳米复合材料：插层结构，协同增强和摩擦降低效果

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摘要

On the basis of the industrialized graphene nanosheets (GNs) product, we synthesized monomer casting nylon-6 (MC PA6)/GN-3-aminopropyl-terminated poly(dimethylsiloxane) (APDMS) nanocomposite in situ through the anchoring effect of APDMS onto the GN surface. APDMS/PA6 molecules were confirmed to intercalate into the GN layers by the formation of strong interfacial interactions. The intercalation ratio and the average layer thickness of the grafted GN sample decreased in the presence of APDMS. Moreover, for MC PA6/GN APDMS nanocomposite, GN APDMS was uniformly distributed in the matrix and no phase separation was observed. The size of spherical APDMS particles was obviously reduced compared with that of MC PA6/APDMS composite, revealing a strong interaction between APDMS and GN and the enhancement of compatibility in the composite system. Compared with neat MC PA6, the addition of GN APDMS resulted in 12% increase in the tensile strength and 37% increase in the impact strength; meanwhile, increase in both the storage modulus (E') and the glass transition temperature (T-g) indicated synergistic reinforcing and toughening effect of GN APDMS on MC PA6. Furthermore, over 81 and 48% reduction in the friction coefficient and the specific wear rate, respectively, was achieved for the nanocomposite, and the worn surface displayed flat and smooth features with a uniform depth distribution, a low annealing effect, and a reduced friction heat, further confirming the synergistic friction-reducing effect of GN APDMS on MC PA6.
机译：在工业化石墨烯纳米片（GNS）产品的基础上，我们通过APDMS的锚定效应合成单体铸造尼龙-6（MC PA6）/ GN-3-氨基丙基封端的聚（二甲基硅氧烷）（APDMS）纳米复合材料GN表面。通过形成强界面相互作用，确认APDMS / PA6分子嵌入GN层中。在APDMS存在下，移植的GN样品的嵌入率和平均层厚度降低。此外，对于MC PA6 / GN APDMS纳米复合材料，GN APDMS在基质中均匀分布，观察到没有相分离。与MC PA6 / APDMS复合材料相比，球形APDMS颗粒的尺寸明显减少，揭示了APDMS和GN之间的强相互作用以及复合系统中的相容性的增强。与纯净MC PA6相比，加入GN APDMS导致拉伸强度增加12％，冲击强度增加37％;同时，储存模量（E'）和玻璃化转变温度（T-G）的增加表明了GN APDMS对MC PA6的协同增强和增韧效果。此外，对于纳米复合材料，分别达到摩擦系数的81和48％和特定磨损率超过81％和48％，并且磨损的表面显示出平坦和平滑的特征，具有均匀的深度分布，低退火效果和减少的摩擦热量，进一步证实GN APDMS对MC PA6的协同摩擦降低效果。

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