Abstract

Nanosized semiconducting cadmium selenide particles were successfully distributed within the polymer matrix of polyvinyl alcohol (PVA) utilizing the method of heat induced chemical synthesis. The structural characterization of the prepared nanocomposite was conducted using X-ray diffraction for the phase analysis of the nanocrystallites, Transmission electron microscopy (TEM) was used for size and shape determination of the nanoparticles and Fourier transform infrared (FTIR) spectroscopy for identification of the various chemical functional groups possessed by the PVA/CdSe nanocomposites. Various properties of hybrid nanocomposites have been widely scrutinized by researchers during the past few decades because of their unique properties and versatility. The present study involved the behavioral analysis of various optical properties, such as optical absorbance (A), transmittance (T), optical band gap (E_g), refractive index (n), extinction coefficient (k), real and imaginary dielectric constants (ε₁ and ε₂) and optical conductivity (σ_opt), of nanocomposite thin films produced by solution casting at temperatures ranging from 303 K to 343 K. The present study also deals with the evaluation of various ultrasonic acoustical properties, like adiabatic compressibility (β_ad), acoustic impedance (Z), intermolecular free length (L_f), relaxation time (τ) and attenuation coefficient, α, as a function of the square of the frequency (ƒ¹ Masoud, E. M.; El-Bellihi, A. A.; Bayoumy, W. A.; Mohamed, E. A. Polymer Composite Containing Nano Magnesium Oxide Filler and Lithiumtriflate Salt: An Efficient Polymer Electrolyte for Lithium Ion Batteries Application. J. Mol. Liq. 2018, 260, 237–244. DOI: https://doi.org/10.1016/j.molliq.2018.03.084.[Crossref], [Web of Science ®] , [Google Scholar]), i.e., (α/ƒ¹ Masoud, E. M.; El-Bellihi, A. A.; Bayoumy, W. A.; Mohamed, E. A. Polymer Composite Containing Nano Magnesium Oxide Filler and Lithiumtriflate Salt: An Efficient Polymer Electrolyte for Lithium Ion Batteries Application. J. Mol. Liq. 2018, 260, 237–244. DOI: https://doi.org/10.1016/j.molliq.2018.03.084.[Crossref], [Web of Science ®] , [Google Scholar]), to permit detailed understanding of behavioral changes in particle-fluid interactions with variation in the solution temperature of the nanocomposite.

摘要

利用热诱导化学合成的方法，纳米尺寸的半导体硒化镉颗粒成功地分布在聚乙烯醇 (PVA) 的聚合物基质中。制备的纳米复合材料的结构表征使用 X 射线衍射进行纳米微晶的相分析，透射电子显微镜 (TEM) 用于确定纳米颗粒的尺寸和形状，傅里叶变换红外 (FTIR) 光谱用于鉴定纳米晶PVA/CdSe 纳米复合材料所具有的各种化学官能团。在过去的几十年中，混合纳米复合材料的各种特性因其独特的特性和多功能性而受到研究人员的广泛关注。本研究涉及各种光学特性的行为分析，_克），折射率（n），消光系数（k），实部和虚介电常数（ε ₁和ε ₂）和光电导率（σ_选择），在温度为303 K至通过溶液流延制备的纳米复合薄膜的343 K。本研究还涉及对各种超声声学特性的评估，如绝热压缩率 (β _ad )、声阻抗 (Z)、分子间自由长度 (L _f )、弛豫时间 (τ) 和衰减系数α，作为频率平方的函数 (ƒ ¹ 马苏德，EM；El-Bellihi, AA ; 巴尤米，华盛顿州；Mohamed， 含有纳米氧化镁填料和三氟甲磺酸锂盐的EA聚合物复合材料：一种用于锂离子电池应用的高效聚合物电解质。J.摩尔。液体。 2018 , 260 , 237 – 244。DOI：https://doi.org/10.1016/j.molliq.2018.03.084。[Crossref], [Web of Science®], [  Google Scholar] ), 即 (α/ƒ ¹ 马苏德，EM；El-Bellihi, AA ; 巴尤米，华盛顿州；Mohamed， 含有纳米氧化镁填料和三氟甲磺酸锂盐的EA聚合物复合材料：一种用于锂离子电池应用的高效聚合物电解质。J.摩尔。液体。 2018 , 260 , 237 – 244。DOI：https://doi.org/10.1016/j.molliq.2018.03.084。[Crossref]、[Web of Science®]、[  Google Scholar]），以便详细了解粒子-流体相互作用随纳米复合材料溶液温度变化的行为变化。