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首页> 外文期刊>Journal of Applied Polymer Science >Poly(ethylene terephthalate)-based nanocomposite films as greenhouse covering material: Environmental sustainability, mechanical durability, and thermal stability
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Poly(ethylene terephthalate)-based nanocomposite films as greenhouse covering material: Environmental sustainability, mechanical durability, and thermal stability

机译：聚（对苯二甲酸乙二醇酯）基于纳米复合膜作为温室覆盖材料：环境可持续性，机械耐久性和热稳定性

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摘要

The environmental sustainability, mechanical durability, and thermal stability of the poly(ethylene terephthalate) (PET)-based nanocomposite films compared with pure PET were evaluated. The samples were obtained by incorporating 2 wt% of TiO2, SiO2, ZnO nanoparticles (NPs), and an equal mixture of NPs in polymer by melt-mixing in a twin-screw extruder. The mechanical properties and hardness of samples were determined by the tensile and the atomic force microscopy-based nanoindentation tests. The melting, crystallization, and glass transition temperatures of samples were studied by dynamic mechanical thermal analysis and differential scanning calorimetry. The effects of compatibility, dispersity, and hydrophobicity of NPs on the surface morphology, crystallinity, and thermomechanical properties of nanocomposites were studied. The interaction of SiO(2)NPs with PET chains had a promising effect on the surface morphology, high elastic modulus, dispersibility, crystallinity, and thermostability of the sample. The mixing of ZnO and TiO(2)NPs improved the UV-blocking effects, and photostability, while the SiO(2)and TiO(2)NPs maintained the thermal properties of the film against UV radiation. The resulting film could be a good candidate as a greenhouse covering material due to its suitable photosynthetically active radiation transmittance.
机译：与纯PET相比，评估了聚对苯二甲酸乙二醇酯（PET）基纳米复合薄膜的环境可持续性、机械耐久性和热稳定性。通过在双螺杆挤出机中熔融混合，将2 wt%的TiO2、SiO2、ZnO纳米颗粒（NPs）和等量的NPs混合物加入聚合物中，获得样品。通过拉伸和基于原子力显微镜的纳米压痕试验确定了样品的机械性能和硬度。通过动态机械热分析和差示扫描量热法研究了样品的熔化、结晶和玻璃化转变温度。研究了纳米颗粒的相容性、分散性和疏水性对纳米复合材料表面形貌、结晶度和热机械性能的影响。SiO（2）NP与PET链的相互作用对样品的表面形貌、高弹性模量、分散性、结晶度和热稳定性有很大的影响。ZnO和TiO（2）纳米颗粒的混合提高了紫外线屏蔽效果和光稳定性，而SiO（2）和TiO（2）纳米颗粒保持了薄膜的热性能，抵抗紫外线辐射。由于其具有合适的光合有效辐射透射率，因此该薄膜可能是一种很好的温室覆盖材料。

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