CdSe/polyvinyl alcohol nanocomposite films for packaging: thermal, mechanical, optical and physico-chemical properties

IF 2.4 3区化学 Q3 POLYMER SCIENCE Iranian Polymer Journal Pub Date : 2024-05-10 DOI:10.1007/s13726-024-01320-x

Sandeep Singh, Sangeeta Garg, Amit D. Saran

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Abstract

CdSe nanostructures, well-investigated for their optical properties, have been evaluated here as functional fillers in polyvinyl alcohol (PVA) films, for packaging applications. Polymer-nanocomposite films of PVA and CdSe nanoparticles (nanospheres and nanorods), were evaluated for their thermal, mechanical, optical and physico-chemical properties. Microemulsion-synthesized CdSe were loaded in PVA films by solution casting method. CdSe-PVA films were prepared at varying morphology (spherical to rod-like) of CdSe, by controlling the reaction time (0, 2, 4, 6 and 8 h) at 1% (by weight) loading. The effect of loading of CdSe was also studied at 0.1, 0.5, 1, 5, and 10% (by weight) for the reaction time of 4 h. CdSe nanoparticles were characterized by high-resolution transmission electron microscopy (HR-TEM) and X-ray diffractometry (XRD). The melting point and heat of fusion of CdSe-PVA films (for the reaction time of 4 h) exhibited the maximum values of 216.9 ± 0.73 °C and 6.78 ± 0.24 J/g, respectively, at 1% (by weight) of CdSe, as compared with 209.8 ± 0.52 °C and 3.76 ± 0.1 J/g for plain PVA film. The CdSe-PVA films with spherical CdSe showed the maximum enhancement of 118 and 87.4% for Young’s modulus (MPa) and modulus of toughness (MPa), respectively as compared with PVA films. With increasing load of CdSe, the CdSe-PVA films showed an increase in the two moduli with maximum enhancement of 124 and 57 at 10% (by weight) of CdSe, as compared with PVA films. The optical, colorimetric, chemical resistance, UV-hindrance, water content and antibacterial properties of CdSe-PVA films were also investigated.

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用于包装的 CdSe/聚乙烯醇纳米复合薄膜：热学、机械、光学和物理化学特性

碲化镉（CdSe）纳米结构的光学特性已得到充分研究，本研究将其作为聚乙烯醇（PVA）薄膜中的功能性填料，用于包装应用。对 PVA 和硒化镉纳米颗粒（纳米球和纳米棒）的聚合物纳米复合薄膜的热、机械、光学和物理化学性能进行了评估。通过溶液浇铸法将微乳液合成的碲化镉添加到 PVA 薄膜中。通过控制反应时间（0、2、4、6 和 8 小时），在 CdSe 的负载量为 1%（重量比）时，制备出不同形态（球形到棒状）的 CdSe-PVA 薄膜。通过高分辨率透射电子显微镜（HR-TEM）和 X 射线衍射仪（XRD）对硒化镉纳米粒子进行了表征。CdSe-PVA 薄膜的熔点和熔融热（反应时间为 4 小时）在 CdSe 含量为 1%（重量比）时分别达到最大值 216.9 ± 0.73 ℃ 和 6.78 ± 0.24 J/g，而普通 PVA 薄膜的熔点和熔融热分别为 209.8 ± 0.52 ℃ 和 3.76 ± 0.1 J/g。与 PVA 薄膜相比，含有球形 CdSe 的 CdSe-PVA 薄膜的杨氏模量（兆帕）和韧性模量（兆帕）分别提高了 118% 和 87.4%。随着 CdSe 负载的增加，CdSe-PVA 薄膜的两种模量都有所提高，与 PVA 薄膜相比，CdSe 含量达到 10%（重量比）时，两种模量分别提高了 124% 和 57%。此外，还研究了 CdSe-PVA 薄膜的光学、比色、耐化学性、紫外线阻碍、含水量和抗菌性能。

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来源期刊

Iranian Polymer Journal 化学-高分子科学

CiteScore

4.90

自引率

9.70%

发文量

107

审稿时长

2.8 months

期刊介绍： Iranian Polymer Journal, a monthly peer-reviewed international journal, provides a continuous forum for the dissemination of the original research and latest advances made in science and technology of polymers, covering diverse areas of polymer synthesis, characterization, polymer physics, rubber, plastics and composites, processing and engineering, biopolymers, drug delivery systems and natural polymers to meet specific applications. Also contributions from nano-related fields are regarded especially important for its versatility in modern scientific development.