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首页> 外文期刊>RSC Advances >Bio-elastomer nanocomposites reinforced with surface-modified graphene oxide prepared via in situ coordination polymerization
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Bio-elastomer nanocomposites reinforced with surface-modified graphene oxide prepared via in situ coordination polymerization

机译：通过原位配位聚合制备的表面改性的石墨烯氧化物增强生物弹性体纳米复合材料

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This article proposes a method to produce bio-elastomer nanocomposites, based on polyfarnesene or polymyrcene, reinforced with surface-modified graphene oxide (GO). The surface modification is performed by grafting alkylamines (octyl-, dodecyl-, and hexadecylamine) onto the surface of GO. The successful grafting was confirmed via spectroscopic (FTIR and Raman) and X-ray diffraction techniques. The estimated grafted amines appear to be around 30 wt%, as calculated via thermogravimetric analysis, increasing the inter-planar spacing among the nanosheets as a function of alkyl length in the amine. The resulting modified GOs were then used to prepare bio-elastomer nanocomposites via in situ coordination polymerization (using a ternary neodymium-based catalytic system), acting as reinforcing additives of polymyrcene and polyfarnesene. We demonstrated that the presence of the modified GO does not affect significantly the catalytic activity, nor the microstructure-control of the catalyst, which led to high cis -1,4 content bio-elastomers (>95%). Moreover, we show via rheometry that the presence of the modified-GO expands the capacity of the elastomer to store deformation or applied stress, as well as exhibit an activation energy an order of magnitude higher.
机译：本文提出了一种生产生物弹性体纳米复合材料的方法，基于聚氟烯或多氟烯，用表面改性的石墨烯（GO）加强。通过将烷基胺（辛基 - ，十二烷基 - 和十六烯胺）接枝到去的表面上进行表面改性。通过光谱（FTIR和拉曼）和X射线衍射技术确认成功接枝。估计的接枝胺似乎约为30wt％，如通过热重分析计算，随着胺中的烷基长度的函数增加了纳米片中的平面间距。然后使用所得改性的GOS通过原位配位聚合（使用三元钕类催化系统）制备生物弹性体纳米复合材料，作用为增强金属烯和聚甲烯的添加剂。我们证明，改性液体的存在不会显着影响催化活性，也不会影响催化剂的微观结构控制，其导致高CIS -1,4含量生物弹性体（> 95％）。此外，我们通过流变测量来显示改性 - 去扩展弹性体的容量来存储变形或施加应力，以及表现出较高量的激活能量。

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