A study of the mechanical performance of nanocomposites of polyethylene containing exfoliated boron nitride nanoplatelets
A study of the mechanical performance of nanocomposites of polyethylene containing exfoliated boron nitride nanoplatelets
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含剥离氮化硼纳米片的聚乙烯纳米复合材料的机械性能研究
DOI：
10.1002/pc.26936
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发表时间：
2022-07
影响因子：
5.2
通讯作者：
Richao Zhang
中科院分区：
文献类型：
--
作者：
Si‐Ning Wei;Xin Liu;Jun Yan;Meiling Zhong;Joseph Paul;Jiali Zhang;Richao Zhang
氮化硼纳米片（BNNPs）正在成为开发具有电绝缘性能的聚合物基导热纳米复合材料的潜在候选者。通常，通常发现这种基于聚合物的纳米复合材料的机械性能（例如韧性）较差，这主要是由于BNNP的分散性差，这是由BNNP和聚合物基质之间较弱的界面相互作用引起的。在这里，我们报告了一个成功的方法来制造高密度聚乙烯（HDPE）/BNNP纳米复合材料，具有上级的机械性能，通过原位剥离的纳米填料通过熔融挤出技术。所得结果表明，BNNP负载量为15wt%的纳米复合材料的韧性为18.8 × 103 KJ m-3，即与对照HDPE样品相比提高了约1.5倍。机械性能的增强可归因于使用熔融挤出途径实现的剥离的BNNPs的更大程度的均匀分散。通过扫描电镜和傅里叶变换红外光谱的分析结果表明，由于BNNPs与聚乙烯链之间的相互作用较强，形成了一种有趣的“向日葵状”核壳结构，从而促进了剥离的BNNPs在HDPE基体中的均匀分散。因此，这项工作开辟了一条途径，走向一个简单的和可升级的版本，用于制造聚合物纳米复合材料，具有上级的机械性能和更广泛的适用性。
Boron nitride nanoplatelets (BNNPs) are emerging as a potential candidate for developing polymer-based thermally conducting nanocomposites that have electrically insulating properties. Generally, the mechanical performance of such polymer-based nanocomposites, for example, toughness, is often found to be inferior, primarily, owing to the poor dispersion of BNNP, resulting from weaker interfacial interactions between BNNPs and polymer matrices. Here, we report on a successful method to fabricate high density polyethylene (HDPE)/BNNP nanocomposites, with superior mechanical properties, through the in situ exfoliation of the nanofiller via a melt-extrusion technique. The results obtained showed that the toughness of a nanocomposite with 15 wt% BNNP loading is 18.8 × 103 KJ m−3, that is, about 1.5 times enhancement as compared to the control HDPE sample. The enhancement in mechanical properties can be attributed to a greater degree of homogeneous dispersion of the exfoliated BNNPs achieved using the melt- extrusion route. The results that were analyzed through scanning electron microscope and Fourier transform infrared measurements showed that an interesting microstructural feature, named “sunflower-like” core-shell structure, formed owing to the relatively stronger interactions between BNNPs and polyethylene chains, which in turn facilitated the uniform dispersion of exfoliated BNNPs in HDPE matrix. This work, therefore, opens up a pathway toward an easy and up-scalable version for fabricating polymer nanocomposites that have superior mechanical performance and with wider applicability.
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影响因子：
5.5
作者：
Dong Zhou;M. Fuentes-Cabrera;Akash Singh;R. Unocic;J. Carrillo;Kai Xiao;Yumeng Li;Bo Li
通讯作者：
Dong Zhou;M. Fuentes-Cabrera;Akash Singh;R. Unocic;J. Carrillo;Kai Xiao;Yumeng Li;Bo Li
影响因子：
9.5
作者：
Richao Zhang;D. Sun;Ai Lu;S. Askari;M. Macias‐Montero;P. Joseph;D. Dixon;K. Ostrikov;P. Maguire
通讯作者：
Richao Zhang;D. Sun;Ai Lu;S. Askari;M. Macias‐Montero;P. Joseph;D. Dixon;K. Ostrikov;P. Maguire
影响因子：
3.9
作者：
A. Chaurasia;A. Parashar;R. S. Mulik
通讯作者：
A. Chaurasia;A. Parashar;R. S. Mulik
影响因子：
29.4
作者：
Li, Xianlei;Hao, Xiaopeng;Qian, Guodong
通讯作者：
Qian, Guodong
影响因子：
3.2
作者：
PARKER, WJ;JENKINS, RJ;BUTLER, CP
通讯作者：
BUTLER, CP