Sahoo Anindita, Gayathri H N, Phanindra Sai T, Upasani Prasad S, Raje Vivek, Berkmans Joseph, Ghosh Arindam
Department of Physics, Indian Institute of Science, Bangalore 560012, India.
Nanotechnology. 2020 Jul 31;31(31):315706. doi: 10.1088/1361-6528/ab88ec. Epub 2020 Apr 14.
Polyethylene terephthalate-based nanocomposites with hexagonal boron nitride nanosheets (BNNs) were prepared by a solution casting method with varying concentrations of BNNs from 0.5 wt% to 4 wt%. Melting and crystallization behaviour of the composites were investigated by differential scanning calorimetry, which suggests that with increasing presence of nanosheets, the crystallinity increases and hence the polyethylene terephthalate chain mobility gets restricted, which leads to suppression of crystal growth. The nanoindentation measurements on the composite films exhibit improved mechanical properties. Enhancement of 33.3% of elastic modulus and 32.4% of hardness was observed with 2 wt% infusion of boron nitride nanosheets in polyethylene terephthalate.
采用溶液浇铸法制备了含有不同浓度（0.5 wt%至4 wt%）六方氮化硼纳米片（BNNs）的聚对苯二甲酸乙二酯基纳米复合材料。通过差示扫描量热法研究了复合材料的熔融和结晶行为，结果表明，随着纳米片含量的增加，结晶度提高，从而聚对苯二甲酸乙二酯链的迁移率受到限制，导致晶体生长受到抑制。对复合薄膜的纳米压痕测量显示其力学性能得到改善。在聚对苯二甲酸乙二酯中注入2 wt%的氮化硼纳米片时，观察到弹性模量提高了33.3%，硬度提高了32.4%。
