Effect of networked hybridized nanoparticle reinforcement on the thermal conductivity and mechanical properties of natural rubber composites.
Effect of networked hybridized nanoparticle reinforcement on the thermal conductivity and mechanical properties of natural rubber composites.
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DOI：
10.1039/c8ra08543a
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发表时间：
2019-01-02
期刊：
影响因子：
3.9
通讯作者：
Silva, Vinod Asantha
中科院分区：
文献类型：
--
作者：
Jayasinghe, J. M. A. R. B.;De Silva, R. T.;de Silva, Rohini M.;de Silva, K. M. Nalin;Mantilaka, M. M. M. G. P. G.;Silva, Vinod Asantha
通过引入新型导电杂化纳米填料，即聚苯胺接枝碳黑(PANI/CB)纳米粒子和碳纤维纳米粒子(CF/CB)复合材料，提高了天然橡胶(NR)的导热性能。采用原位法制备了PANI/CB杂化填料，首先将苯胺单体吸附在炭黑球状结构域上，然后在氧化剂存在下聚合。通过熔融共混制备了最终的橡胶复合材料，其中PANI/CB和CF/CB的填充量分别保持在橡胶的百分之四十(Phr)。含CF/CB(20 ： 20)和PANI/CB(20 ： 20)的橡胶复合材料的导热系数分别为0.45W m−1 K−1和0.31W m−1 K−1，且导热系数较对照样品(0.25W m−1 K−1)显著提高。CF/CB和PANI/CB复合材料的较高导热系数表明，与整齐的CB橡胶复合材料相比，CB纳米颗粒形成的CF和PANI纳米纤维的网络结构极大地提高了散热性能。扫描电子显微镜(SEM)证实了所合成的PANI与球形CB纳米粒子的结合，以及CF/CB和PANI/CB杂化填料的相互连接形态。用傅里叶变换红外光谱(FTIR)对合成的PANI/CB杂化填料进行了表征，以评价其化学性能。热重分析表明，与对照相比，CF/CB(20 ： 20)和PANI/CB(20 ： 20)复合材料具有更高的热稳定性。此外，CF/CB(20 ： 20)和PANI/CB(20 ： 20)的加入显著提高了轮胎的极限拉伸强度、断裂模数、回弹和耐磨性等力学性能，远高于轮胎行业要求的最低标准力学参数。这些增强复合材料在轮胎工业中显示出作为橡胶散热复合材料的巨大潜力。通过引入新型导电杂化纳米填料，即聚苯胺接枝碳黑纳米颗粒和连接碳微纤维复合材料的碳黑纳米颗粒，提高了天然橡胶的导热性能。
Thermal conductivity of natural rubber (NR) was enhanced by incorporating novel conductive hybrid nanofillers, namely polyaniline grafted carbon black (PANI/CB) nanoparticles and carbon black nanoparticles linked with carbon microfiber (CF/CB) composites. The PANI/CB hybrid fillers were synthesized using an in situ method, where aniline monomers were initially adsorbed onto carbon black spherical domains and, afterwards, it was polymerized in the presence of an oxidizer. Final rubber composites were prepared through melt mixing, where PANI/CB and CF/CB filler loading was kept at 40 parts per hundred of rubber (phr). The thermal conductivity values of the rubber composites with CF/CB (20 : 20) and PANI/CB (20 : 20) yield were 0.45 W m−1 K−1 and 0.31 W m−1 K−1, respectively and the thermal conductivity improved significantly compared to the control (0.25 W m−1 K−1) sample. The higher thermal conductivity values of CF/CB and PANI/CB incorporated composites suggest that the generated networked structure of CF and PANI nanofibers with CB nanoparticles has immensely contributed to enhancing the heat dissipation compared to that of the neat CB rubber composite. Scanning electron micrographs (SEM) confirmed the attachment of the synthesized PANI onto the spherical CB nanoparticles and interconnected morphology of CF/CB and PANI/CB hybrid fillers. The synthesized PANI/CB hybrid filler was further characterized using Fourier-transform infrared (FTIR) spectroscopy to evaluate the chemical properties. Furthermore, thermogravimetric analysis revealed the higher thermal stability of CF/CB (20 : 20) and PANI/CB (20 : 20) composites compared to the control. Moreover, the addition of CF/CB (20 : 20) and PANI/CB (20 : 20) improved the mechanical properties such as ultimate tensile strength, modulus at break, resilience and abrasion resistance significantly and well above the minimum required standard mechanical parameters in the tyre industry. These reinforced composites show great potential to be used as heat dissipating rubber composites in the tyre industry. Thermal conductivity of natural rubber was enhanced by incorporating novel conductive hybrid nanofillers, namely polyaniline grafted carbon black nanoparticles and carbon black nanoparticles linked with carbon microfiber composites.
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影响因子：
2.1
作者：
Guo, Chuigen;Zhou, Lin;Lv, Jianxiong
通讯作者：
Lv, Jianxiong
影响因子：
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作者：
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通讯作者：
Wilkes, GB
DOI：
10.1016/j.compositesa.2005.07.006
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作者：
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