锌金属配合物改善甲基纤维素基绿色聚合物复合材料的光电参数:结构和光学性质

IF 4.8 2区 工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD
Dyari M. Mamand, Sarkawt A. Hussen, Shujahadeen B. Aziz
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引用次数: 0

摘要

目前的研究采用绿色方法,以甲基纤维素(MC)为基础,提供具有增强光电性能的聚合物复合材料。利用绿茶染料配体成功制备锌金属配合物(Zn-MC)。FTIR结果表明,锌盐阴离子带在Zn-MC产物中消失。FTIR结果表明,添加的Zn-MC颗粒与载体聚合物之间存在良好的相互作用。XRD谱图显示了制备的Zn-MC的非晶态行为。随着Zn-MC浓度的增加,MC主体聚合物的x射线衍射图中出现了峰状结构,峰状结构的强度逐渐下降,并逐渐展宽。在紫外可见光谱研究的基础上,利用各种模型确定了光学带隙。所有模型的带隙值都很接近。发现纯MC聚合物的光学带隙为6 eV,加入36 mL悬浮Zn-MC后,光学带隙降至1.6 eV。利用德鲁德-洛伦兹振子模型,计算了与微观性质相关的特定参数,如弛豫时间(τ)、载流子浓度(N/m*)和光迁移率(\(\mu_{opt}\))。从W-D模型中确定的参数用于计算光矩(M−1和M−3)。利用折射率测定了带间振子的平均波长(\(\lambda_{0}\))和振子的平均强度(\(S_{o}\))。发现\(\lambda_{0}\)随着Zn-MC的增加而增大,同时导致\(S_{o}\)减小。乌尔巴赫能随金属配合物浓度的增加而升高。光学电导率结果表明,Zn-MC的增加直接导致了光学电导率的增加。研究了相速度(\(v_{p}\))和群速度(\(v_{g}\))这两个与折射率相关的关键物理参数。研究了被称为Verdet因子(\(V\left( \lambda \right)\))的磁光常数,它表征了在单道中每单位磁场和厚度的法拉第旋转体积。与干净的MC样品相比,掺杂薄膜的非线性折射率\(n_{2}\)有所增加。测定了薄膜表面电阻和热发射的基尔霍夫函数。研究了MC固体复合材料的第一阶(\(\chi^{\left( 1 \right)}\))和第三阶(\(\chi^{\left( 3 \right)}\))非线性光学参数。图形摘要
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improvement of optoelectronic parameters of methylcellulose (MC) based green polymer composite via zinc metal complexes: structural and optical properties

The current study followed green methodology to deliver polymer composites based on methylcellulose (MC) with enhanced optoelectronic properties. Ligands of green tea dye were used successfully to produce zinc metal complexes (Zn-MC). The FTIR established that bands associated with anions of the zinc salt were disappeared in Zn-MC product. The FTIR results of the composite films indicate good interaction among host polymer and the added Zn-MC particles. The XRD pattern revealed the amorphous behavior of the prepared Zn-MC. The humps appeared in the XRD pattern of MC host polymer, dropped in intensity and broadened with increasing Zn-MC concentration. The optical band gap was determined based on UV–vis investigation using various models. The band gap values in all models are close to each other. The optical band gap was found to be 6 eV for pure MC polymer and reduced to 1.6 eV upon adding 36 mL of suspended Zn-MC. Using the Drude-Lorentz oscillator model, specific parameters associated with microscopic properties such as relaxation time (τ), carrier concentration (N/m*), and optical mobility (\(\mu_{opt}\)) were calculated. The parameters determined from the W-D model were used to calculate the optical moments (the M−1 and M−3). The average wavelength of inter-band oscillators (\(\lambda_{0}\)), and the average strength of oscillators (\(S_{o}\)) were determined with the help of refractive index. It was found that when \(\lambda_{0}\) increases with increasing Zn-MC, it simultaneously causes \(S_{o}\) to decrease. The Urbach energy rises with increasing metal complex concentration. The optical conductivity results revealed that increasing of Zn-MC causes a direct increase in optical conductivity. The phase velocity (\(v_{p}\)) and group velocity (\(v_{g}\)) as two key physical parameters related to refractive index were studied. The Magneto-Optical constant known as the Verdet factor (\(V\left( \lambda \right)\)), which characterizes the volume of Faraday rotation per unit of magnetic field and thickness in a single pass was studied. The non-linear refractive index \(n_{2}\) was found to increase in the doped films compared to the clean MC sample. The Kirchhoff functions, which consist of film surface resistance and thermal emission, were determined. The first \(\chi^{\left( 1 \right)}\)), and third \(\chi^{\left( 3 \right)}\) order non-linear optical parameters also studied for the MC solid composites.

Graphical abstract

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来源期刊
Cellulose
Cellulose 工程技术-材料科学:纺织
CiteScore
10.10
自引率
10.50%
发文量
580
审稿时长
3-8 weeks
期刊介绍: Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.
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