Effect of Hexagonal Boron Nitride Nanoplatelet on Crystal Nucleation, Mechanical Behavior, and Thermal Stability of High‐Density Polyethylene‐Based Nanocomposites
Effect of Hexagonal Boron Nitride Nanoplatelet on Crystal Nucleation, Mechanical Behavior, and Thermal Stability of High‐Density Polyethylene‐Based Nanocomposites
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DOI：
10.1002/mame.202000248
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发表时间：
2020-07
影响因子：
3.9
通讯作者：
A. Chaurasia;A. Parashar;R. S. Mulik
中科院分区：
文献类型：
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作者：
A. Chaurasia;A. Parashar;R. S. Mulik
六方氮化硼纳米片（BNNP）可显著提高高密度聚乙烯的机械和热性能。为了保证BNNP的上级分散性，采用了两种不同的技术，胶体溶液和溶剂共混，用于制备纳米复合材料。与溶剂共混相比，基于胶体溶液的制造技术具有纳米填料在PE基体中的上级分散能力，有助于提高合成纳米复合材料的热稳定性和结晶度。据报道，在1%重量分数的BNNP下，聚乙烯（PE）的结晶速率显著增加，其随着BNNP重量百分比的增加而进一步增加。BNNP作为PE结晶成核位点的新来源，也降低了二级结构球晶的尺寸。提高BNNP/PE纳米复合材料的拉伸强度和杨氏模量的报道与BNNP的重量贡献的增加在1%至5%的范围内。
Hexagonal boron nitride nanoplatelets (BNNP) significantly enhance the mechanical and thermal properties of high‐density polyethylene. In order to ensure superior dispersibility of BNNP, two different techniques, colloidal solution, and solvent blending, are used for fabricating nanocomposites. Compared to solvent blending, the colloidal solution‐based fabrication technique has superior dispersion capabilities for nanofillers in the PE matrix, which helps in improving the thermal stability and crystallinity in synthesized nanocomposites. A significant increase in the rate of crystallization of polyethylene (PE) is reported at 1% weight fraction of BNNP, which further increases with the increase in weight percentage of BNNP. BNNP acts as a new source of nucleating sites for crystallization in PE that also reduces the size of secondary structures spherulites. Enhanced tensile strength and Young’s modulus of BNNP/PE nanocomposites are reported with the increase in weight contribution of BNNP in the range of 1% to 5%.