Polypropylene-Based Nanocomposite with Enhanced Aging Stability by Surface Grafting of Silica Nanofillers with a Silane Coupling Agent Containing an Antioxidant
Polypropylene-Based Nanocomposite with Enhanced Aging Stability by Surface Grafting of Silica Nanofillers with a Silane Coupling Agent Containing an Antioxidant
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DOI：
10.1021/acsomega.0c01198
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发表时间：
2020-05
期刊：
影响因子：
4.1
通讯作者：
Ryota Watanabe;Aki Sugahara;Hideaki Hagihara;K. Sakamoto;Y. Nakajima;Y. Naganawa
中科院分区：
文献类型：
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作者：
Ryota Watanabe;Aki Sugahara;Hideaki Hagihara;K. Sakamoto;Y. Nakajima;Y. Naganawa
同时提高聚合物纳米复合材料的力学性能和使用寿命对进一步扩展高分子材料的多功能性和减少对环境的影响具有重要意义。在本研究中，我们通过添加含有受阻酚抗氧化剂的硅烷偶联剂（SCA）作为填料的表面改性有序二氧化硅纳米球，制备了具有改善老化稳定性的增强聚丙烯（PP）基纳米复合材料。SCA在填料表面的均匀接枝有助于填料均匀分散到基体中，从而改善了性能（例如刚度和延展性），并通过填料分散使抗氧化成分均匀分布到整个纳米复合材料中。SCA的接枝也可能对抗氧化剂迁移起到抑制作用，从而导致聚合物在老化过程中失去稳定性。这种设计pp基纳米复合材料的新思路，在提高其力学性能和寿命的同时，有望应用于制造各种类型的聚合物纳米复合材料。
Simultaneous improvement in the mechanical properties and lifetime of polymer nanocomposites is crucially significant to further extend the versatility of polymer materials and reduce environmental impact. In this study, we fabricated reinforced polypropylene (PP)-based nanocomposites with improved aging stability by the addition of surface-modified well-ordered silica nanospheres with a silane coupling agent (SCA) containing hindered phenol antioxidant as a filler. Uniform grafting of the SCA on the filler surface contributed to homogeneous dispersion of the filler into the matrix, leading to improved properties (e.g., stiffness and ductility) and uniform distribution of the antioxidant component into the entire nanocomposite by filler dispersion. The grafting of SCA also likely provides an inhibitory effect on antioxidant migration, which leads to loss of polymer stability during the aging process. This novel idea for the material design of PP-based nanocomposites, which simultaneously enhances their mechanical properties and lifetime, is promising for application in the fabrication of various types of polymer nanocomposites.