Tailoring optical and electrical properties of hybrid polymer nanodielectrics: Synthesis and characterization of CuO/TiO2 nanoparticle-embedded HPMC/NaAlg blend

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.503

H.M. Ragab , N.S. Diab , Azza M. Khaled , Shimaa Mohammed Aboelnaga , Ammar Qasem , M.O. Farea , M.A. Morsi

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引用次数: 0

Abstract

Polymer nanodielectrics composed of nanoceramic fillers exhibit adjustable optical and electrical properties that make them suitable for advanced optoelectronic and organoelectronic devices. This study synthesized copper oxide and titanium dioxide nanoparticles (CuO/TiO₂ NPs) using a sonochemical method. These nanoparticles were incorporated into a hybrid polymer matrix of hydroxypropyl methylcellulose and sodium alginate (HPMC/NaAlg) at concentrations of 3.0, 5.0, 7.0, and 9.0 wt% through solution casting. X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectra revealed the induced increment for the amorphous structure of the HPMC/NaAlg blend and the formation of intermolecular interactions between the host polymer and the added hybrid NPs. Optical properties, including the optical bandgap and other optical constants, were examined using UV/vis spectrophotometry, where the direct and indirect bandgaps reduced from 4.51 eV (for pure blend) to 3.28 eV (9.0 wt% nanocomposite film) and 3.37 to 2.29 eV, respectively. The AC electrical conductivity and dielectric complex permittivity were explored over the frequency (f) range of 0.1 Hz–10 MHz. At f = 10 Hz, the dielectric constant increased significantly from 12 to 270, and AC conductivity enhanced from 1.68 × 10⁻¹² S/m to 1.55 × 10⁻¹⁰ S/m with the addition of 9.0 wt% CuO/TiO₂ NPs. These results suggest that the prepared HPMC/NaAlg-CuO/TiO₂ films are promising for various applications such as UV-blockers, optical bandgap tuning, optical coatings, and high-permittivity controllable substrates for futuristic energy storage devices.

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杂化聚合物纳米电介质的光学和电学性能：CuO/TiO2纳米颗粒包埋HPMC/NaAlg共混物的合成和表征

由纳米陶瓷填料组成的聚合物纳米电介质具有可调节的光学和电学性能，使其适用于先进的光电和有机电子器件。本研究采用声化学方法合成了氧化铜和二氧化钛纳米粒子（CuO/TiO2 NPs）。通过溶液铸造，将这些纳米颗粒以3.0、5.0、7.0和9.0 wt%的浓度掺入羟丙基甲基纤维素和海藻酸钠（HPMC/NaAlg）的混合聚合物基质中。x射线衍射（XRD）和傅里叶变换红外光谱（FTIR）显示HPMC/NaAlg共混物的非晶态结构增加，并在宿主聚合物和添加的杂化NPs之间形成分子间相互作用。利用紫外/可见分光光度法检测了其光学性能，包括光学带隙和其他光学常数，其中直接带隙和间接带隙分别从4.51 eV（纯共混物）减少到3.28 eV （9.0 wt%纳米复合膜）和3.37 eV减少到2.29 eV。在0.1 Hz-10 MHz的频率范围内研究了交流电导率和介电复介电常数。在f = 10 Hz时，当添加9.0 wt% CuO/TiO2 NPs时，介电常数从12增加到270，交流电导率从1.68 × 10−12 S/m提高到1.55 × 10−10 S/m。这些结果表明，制备的HPMC/NaAlg-CuO/TiO2薄膜具有广泛的应用前景，如紫外阻挡剂、光学带隙调谐、光学涂层和未来储能器件的高介电常数可控衬底。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.