Polymer Research Laboratory, Department of Polymer Science and Engineering, University of Bonab, P.O. Box 5551761167, Bonab, Iran.
Department of Polymer Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran.
Environ Res. 2022 Apr 15;206:112281. doi: 10.1016/j.envres.2021.112281. Epub 2021 Oct 29.
Recently, attentions to the applications of biotechnology and nanotechnology in the polymer industries have been greater than before. Hybrid nanocomposites containing multi-type of nano structures are widely established, but application of biotechnology for in-situ embedment of nanoparticles in polymer matrix is rarely reported. In this study, poly (ethylene terephthalate) (PET) based ternary bionanocomposites containing modified chitosan (phosphorylated chitosan) and nanosilver particles were prepared by simple eco-friendly method. Chitosan was selected as a biopolymer with respect to the biological activity and compatibility with PET. Phosphorylation of chitosan was achieved in order to introduce the phosphorus moieties as a flame retardant agent in PET matrix by using chemical approach. Also a cost-effective and environmentally friendly method was used for the in-situ fabrication and decoration of silver nanoparticles on to phosphorylated chitosan in PET matrix. Effects of the hybrid system (phosphorylated chitosan and silver nanoparticles) on the morphology, thermal behavior and antibacterial properties of the PET samples were investigated by different methods. The microstructure and homogeneity of the samples were analyzed by studying of dispersion of nanoparticles in PET via scanning electron microscopy. The antibacterial properties of PET nanocomposites can be improved by insertion of silver nanoparticles into the bulk of polymer matrix. Obtained results indicated that the PET/phosphorylated chitosan/silver nanocomposites showed a significantly higher growth inhibition rate compared with the PET and PET/phosphorylated chitosan blend. Also the flame retardant properties of PET nanocomposites were drastically enhanced.
最近，生物技术和纳米技术在聚合物工业中的应用受到了比以往更多的关注。含有多种纳米结构的混合纳米复合材料已经广泛建立，但生物技术在聚合物基体中原位嵌入纳米颗粒的应用却很少有报道。在这项研究中，通过简单的环保方法制备了含有改性壳聚糖（磷酸化壳聚糖）和纳米银颗粒的聚对苯二甲酸乙二醇酯（PET）基三元生物纳米复合材料。壳聚糖被选为一种具有生物活性和与 PET 相容性的生物聚合物。通过化学方法对壳聚糖进行磷酸化，以在 PET 基体中引入磷作为阻燃剂。同时，还采用了一种经济高效且环保的方法，在 PET 基体中原位制备和修饰纳米银颗粒。通过不同的方法研究了杂化体系（磷酸化壳聚糖和银纳米颗粒）对 PET 样品的形貌、热行为和抗菌性能的影响。通过扫描电子显微镜研究纳米颗粒在 PET 中的分散情况，分析了样品的微观结构和均匀性。通过将银纳米颗粒插入聚合物基体中，可以提高 PET 纳米复合材料的抗菌性能。研究结果表明，与 PET 和 PET/磷酸化壳聚糖共混物相比，PET/磷酸化壳聚糖/银纳米复合材料表现出更高的生长抑制率。此外，PET 纳米复合材料的阻燃性能也得到了显著提高。
