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Mechanical properties of polymer composites reinforced by functionalized graphene prepared via direct exfoliation of graphite flakes in styrene

机译：通过苯乙烯的石墨薄片直接剥离制备官能化石墨烯的聚合物复合材料的机械性能

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摘要

Using a convenient sonochemical method, we have prepared polystyrene (PS) functionalized graphenes (FGs) by direct exfoliation of graphite flakes in the monomer of styrene. This material could be dispersed in toluene and subsequently formed into composites with PS by solution casting followed by a compression molding method. The FGs are well dispersed in the PS matrix as evidenced by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The addition of a small amount of FGs significantly increased the glass transition temperature (T-g) of the PS matrix. It's worth noting that compared to pure PS, a 103.7% increase in tensile strength and a 407% improvement of Young's modulus were achieved by addition of only 0.5 wt% FGs due to the effective load transfer between the FGs and the PS matrix. The storage modulus was also considerably enhanced upon addition of FGs. The PS/FG composites show superior mechanical properties as compared to their counterparts reinforced by carbon fillers such as multi-walled carbon nanotubes (MWNT) and thermally reduced graphene (TrG). The presence of PS on the FG surfaces and thus a strong interaction between the FGs and PS is essential for the property enhancements. Moreover, the Young's modulus of the PS/FG composites was compared with the predictions of the well-established Halpin-Tsai model. The FGs are very effective as a reinforcing filler for graphene-based polymeric composites.
机译：使用方便的Sonochemical方法，通过在苯乙烯单体中的石墨薄片直接剥离，制备聚苯乙烯（PS）官能化石墨烯（FGS）。该材料可以分散在甲苯中，随后通过溶液浇铸与PS的复合材料，然后用压缩模塑方法形成。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM），FGS良好地分散在PS基质中。添加少量FGS显着增加了PS基质的玻璃化转变温度（T-G）。值得一提的是，相比于纯的PS，在拉伸强度增加了103.7％和杨氏模量的407％的改善，通过添加仅0.5％（重量）的FG的由于FGS和所述PS基质之间的有效负荷传递实现。在添加FGS时，储存模量也显着提高。与由多壁碳纳米管（MWNT）和热还原石墨烯（TRG）相比，PS / FG复合材料相比，PS / FG复合材料相比，其对应于由碳填充剂（如多壁碳纳米管（MWNT）和热还原的石墨烯增强）。 PS在FG表面上的存在，因此FGS和PS之间的强相互作用对于性质增强至关重要。此外，将PS / FG复合材料的杨氏模量与良好的结合的Halpin-Tsai模型进行了比较。 FGS作为基于石墨烯的聚合物复合材料的增强填料非常有效。

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  • 来源
    《RSC Advances》 |2016年第113期|共7页
  • 作者

    Wang Xiwei; Tan Dongxing; Chu Zhaoyang; Chen Li; Chen Xuegang; Zhao Jian; Chen Guangming;

  • 作者单位

    Qingdao Univ Sci &

    Technol Minist Educ Shandong Prov Key Lab Rubber Plast Key Lab Rubber Plast 53 Zhengzhou Rd Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Minist Educ Shandong Prov Key Lab Rubber Plast Key Lab Rubber Plast 53 Zhengzhou Rd Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Minist Educ Shandong Prov Key Lab Rubber Plast Key Lab Rubber Plast 53 Zhengzhou Rd Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Minist Educ Shandong Prov Key Lab Rubber Plast Key Lab Rubber Plast 53 Zhengzhou Rd Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Minist Educ Shandong Prov Key Lab Rubber Plast Key Lab Rubber Plast 53 Zhengzhou Rd Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Minist Educ Shandong Prov Key Lab Rubber Plast Key Lab Rubber Plast 53 Zhengzhou Rd Qingdao 266042 Peoples R China;

    Chinese Acad Sci Inst Chem Beijing 100190 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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