Vinyl Alcohol Research Articles

One-pot synthesis of Li3xLa2/3−xTiO3/PVA composite with high tunable electrical attributes governed by the Li+ content

The primary goal of this study is to elucidate the structural and electrical characteristics, alongside potential applications, of ceramic-polymeric composites. These composites are achieved by incorporating lithium-lanthanum titanates (Li3xLa2/3−xTiO3 - LLTO) into a polyvinyl alcohol polymeric matrix (PVA). The synthesis of lithium-lanthanum titanates occurred through high-energy ball milling method. Then, three types of composites were produced using the solvent casting method: a sample of pure Poly (vinyl alcohol) polymer (PVA), a second PVA composite with the addition of La0·59Li0·24TiO3 (Li-0.24) and a third sample with La0·56Li0·33TiO3 (Li-0.33). SEM and AFM analyzes revealed notable changes in the morphology and 3D spatial patterns of the films upon incorporating lithium-lanthanum titanates into the PVA matrix. The PVA film presents a topography featuring a more evenly distributed range of topographic heights, indicating a smoother surface structure. With varying LLTO content, the morphology of the PVA composite underwent changes. The lower roughness of the PVA surface is evident from its measured average roughness value (Ra = 1.9 ± 0.5 nm). Upon incorporating LLTO, the surfaces displayed increased roughness, measuring specifically at 40.1 ± 7.3 nm (Li-0.24) and 22.7 ± 5.5 nm (Li-0.33). Notably, there was an approximately 43 % reduction in the average roughness value from Li-0.24 to Li-0.33. The analysis by Raman allowed the identification of functional groups of the PVA polymeric chain, in addition to the presence of some vibrational modes related to the structure of lithium-lanthanum titanates for the sample with the highest content of Li+ ions (Li-0.33). Finally, the sample Li-0.33 showed the lowest value of electrical resistance (67 kΩ) and of phase angle (16°), compared to the PVA (100 MΩ and 90°). These results show that the presence of the LLTO changed the insulating behavior of the PVA matrix changed and improved potential to electronic applications.

Innovative Design and Construction of Poly(Vinyl Alcohol) Coatings by Plant-Inspired Cross-Linking and Hydrogen Bonding Enabled Oil-Resistant and Strong Paper-Based Composites

Innovative Design and Construction of Poly(Vinyl Alcohol) Coatings by Plant-Inspired Cross-Linking and Hydrogen Bonding Enabled Oil-Resistant and Strong Paper-Based Composites

Preparation of radiation-sensitive dosimeter for gamma rays

This research uses two different dosimetry techniques (films and gels) to evaluate how γ-rays affect Cyanidin chloride. The first method relies on combining CC with poly (vinyl alcohol) to create a thin film dosimeter, while the second uses CC with gelatin to create a gel dosimeter that is more sensitive to γ-rays. The produced film or gel changes visually from red to colorless when exposed to γ-rays. The usable dose range of films was up to 35 kGy, and for gels, it was between 10 and 150 Gy. All dosimetric characteristics were studied.

Enhancing Egyptian Kaolin Properties through Additive Engineering: Insights from Poly(vinyl alcohol), Silica Nanoparticles, and Activated Carbon

Enhancing Egyptian Kaolin Properties through Additive Engineering: Insights from Poly(vinyl alcohol), Silica Nanoparticles, and Activated Carbon

Screening of Short-Chain Antimicrobial Peptide LKARI with Broad-Spectrum Bactericidal Properties and Its Application in Promoting Wound Healing.

Due to the extensive use of antibiotics, many highly resistant bacteria and extensively resistant bacteria have been produced. In recent years, the increase of drug-resistant bacteria and the resulting proliferation of drug-resistant bacteria have increased the incidence of hospital-acquired infections and caused great harm to human health. Antimicrobial peptides (AMPs) are considered to be an innovative antibiotic and belong to the latest advances in this field. We designed a polypeptide and verified its low minimum inhibitory concentration and broad-spectrum activity against Gram-positive bacteria, Gram-negative bacteria, and fungi in microbiology and pharmacology. Several experiments have confirmed that the screened antimicrobial peptides have significant antidrug resistance and also show significant therapeutic properties in the treatment of systemic bacterial infections. In addition, through our experimental research, it was proved that the antibacterial hydrogel composed of poly(vinyl alcohol), sodium alginate, and antimicrobial peptides had excellent antibacterial properties and showed good wound healing ability.

Recyclable Bimodal Polyvinyl Alcohol/PEDOT:PSS Hydrogel Sensors for Highly Sensitive Strain and Temperature Sensing.

Multimodal flexible sensors, consisting of multiple sensing units, can sense and recognize different external stimuli by outputting different types of response signals. However, the recovery and recycling of multimodal sensors are impeded by complex structures and the use of multiple materials. Here, a bimodal flexible sensor that can sense strain by resistance change and temperature by voltage change was constructed using poly(vinyl alcohol) hydrogel as a matrix and poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) as a sensing material due to its conductivity and thermoelectric effect. The plasticity of hydrogels, along with the simplicity of the sensor's components and structure, facilitates easy recovery and recycling. The incorporation of citric acid and ethylene glycol improved the mechanical properties, strain hysteresis, and antifreezing properties of the hydrogels. The sensor exhibits a remarkable response to strain, characterized by high sensitivity (gauge factor of 4.46), low detection limit (0.1%), fast response and recovery times, minimal hysteresis, and excellent stability. Temperature changes induced by hot air currents, hot objects, and light cause the sensor to exhibit high response sensitivity, fast response time, and good stability. Additionally, variations in ambient humidity and temperature minimally affect the sensor's strain response, and temperature response remains unaffected by humidity changes. The recycled sensors are essentially unchanged for bimodal sensing of strain and temperature. Finally, bimodal sensors are applied to monitor body motion, and robots to sense external stimuli.

Tough and conductive double-network hydrogel based on PVA/poly(ionic liquids) strengthened by metal ion complexation for flexible sensors

Hydrogels have attracted extensive attention for their promising applications as flexible sensors. Developing conductive hydrogels with excellent mechanical properties still remains a significant challenge. Herein, double-network (DN) hydrogels composed of poly(vinyl alcohol) (PVA) and poly(ionic liquids) (PILs) are prepared through repetitive freezing/thawing process. The hydrogels are further treated with Fe3+ ions to enhance the mechanical properties due to the complexation between carboxyl groups and Fe3+ ions. The influence of the amount of PILs and concentration of Fe3+ on mechanical properties and conductivity is investigated. The optimal DN hydrogel P(VMCA-AA)1/PVA-Fe3+ 4 shows excellent mechanical properties, whose tensile strength, elongation at break, and toughness are 2.2 MPa, 350%, and 3.5 MJ m−3, respectively. P(VMCA-AA)1/PVA-Fe3+ 4 also displays a good conductivity of 1.04 S m−1. Moreover, the hydrogel demonstrates a high sensing sensitivity with a gauge factor (GF) of 3.36, indicating its application potential as a flexible sensor.

Preparation and Properties of Poly(Vinyl Alcohol)-Based Anion-Exchange Membranes with Different Cross-Linked Structures

Preparation and Properties of Poly(Vinyl Alcohol)-Based Anion-Exchange Membranes with Different Cross-Linked Structures

Morphological Properties of Poly (vinyl alcohol)/Gelatin contained Indonesian Carbonated Hydroxyapatite Abalone Nanofibrous Scaffold by Electrospinning

One strategy for dealing with bone defects is replicating and reconstructing artificial bone for bone tissue engineering (BTE) application, known as the scaffold. Bone consists of an extracellular matrix (ECM) which, at the nanoscale, has a fibrous structure that can be replicated in synthetic scaffolds using an electrospinning method. This work describes the analysis of the morphological properties of Poly (vinyl alcohol) (PVA)/Gelatin contained Indonesian carbonated hydroxyapatite (CHA) abalone nanoparticle scaffold by electrospun nanofiber. CHA nanoparticles were produced using a co-precipitation method, and nanofibrous PVA/Gelatin/CHA 5 wt% scaffold was fabricated by electrospinning. The synthesized CHA produced the same condition as B-type CHA, ensured by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffractometer (XRD), and differential scanning calorimetry (DSC), and energy-dispersive X-ray spectroscopy (EDS) tests. The morphological properties of PVA/Gelatin/CHA are analyzed using Scanning Electron Microscopy (SEM). The SEM image indicated that PVA/Gelatin nanofiber tended to have a fine morphology without beads. The agglomeration of the PVA/Gelatin/CHA 5 wt% nanofiber scaffold can be neglected because it is still on the sub-micron scale (1 μm–100 nm). Moreover, adding CHA 5 wt% in the PVA/Gelatin matrix decreased the average fiber diameter. The diameter fiber results are within the fiber diameter range (100–450 nm) in native bone ECM. Therefore, PVA/Gelatin/CHA 5 wt% has the potential to serve as an alternative scaffold material for BTE application.

Enhancement of Poly(vinyl alcohol) Hydrogel Properties by N-Succinyl Chitosan and Mesona chinensis Extract for Use as Wound Dressings

Hydrogels composed of different ratios of poly(vinyl alcohol), N-succinyl chitosan (NSC), and Mesona chinensis extract, for use as a wound dressing, were synthesized via thermal polymerization. Potassium persulfate was chosen as the initiator and glutaraldehyde as the crosslinking agent. NSC was prepared by modification of chitosan with succinic anhydride. It was found that this preparation method gave a high gel fraction percentage. The structures of the prepared hydrogels were characterized by Fourier-transform infrared spectroscopy, and their morphology by scanning electron microscopy (SEM). In addition, water transport properties, mechanical properties and cytotoxicity were also studied. The SEM results show that the hydrogels exhibited porous structures and that pore size and size distribution increased with increasing NSC content. Hydrogel-water interactions and water transport properties were also studied in terms of swelling ratio, equilibrium water retention, and water vapour transmission rate. These showed an increase, from 637 to 1240 %, 17.8 to 21.4 %, and 110 to 121 g h−1 m−2 respectively with an increase in NSC content. These gels exhibit a lower water vapour transmission rate compared to that of second and third degree burns but higher than normal skin. Similarly, NSC improved the mechanical properties, presented in terms of stress and percentage strain, of the hydrogels. The stress, percentage strain, and Young’s modulus were found to increase from 15 to 32 kPa, 197 to 294 %, and 0.078 to 0.133 kPa respectively. The hydrogels can be considered to be non-toxic based on the in vitro cytotoxicity assay results. In conclusion, the results showed that, by varying composition, hydrogel properties can be tuned to the specific requirements of an ideal wound dressing.

Engineered 3D-printed poly(vinyl alcohol) vascular grafts: Impact of thermal treatment and functionalization

Cardiovascular diseases, a leading cause of global mortality, are driving increased demand for artificial blood vessels for surgical repair. This study discloses the fabrication of three-dimensional (3D)-printed small blood vessels as tissue-engineered grafts. Large-diameter artery and vein grafts are readily available in the market, but small-diameter blood vessels face issues due to the lack of suitable materials. Lysine-biofunctionalized and unmodified poly(vinyl alcohol) grafts (PVA grafts) (2 mm inner diameter and 3 mm outer diameter) suitable for veins and venules were designed using Fusion 360 software, Autodesk Fusion. The PVA channels were fabricated from the 3D virtual model through fused deposition modeling using a PVA filament. These channels underwent thermal treatment to adjust their crystallinity, chemical crosslinking, and functionalization to optimize their mechanical properties and biocompatibility. Crosslinking and biofunctionalization were assessed using Fourier-transform infrared spectroscopy with attenuated total reflectance, while X-ray diffraction and differential scanning calorimetry were utilized for structural analysis. PVA grafts were biologically tested using three specific types of cell cultures: bEnd.3 brain endothelial cells, L929 fibroblast cells, and U937 monocyte-like cells. The hemocompatibility of the optimized vascular grafts was evaluated using horse blood, following the guidelines outlined in ASTM F756-13 Standard Practice for Assessment of Hemolytic Properties of Materials. The direct method for hemoglobin determination was specifically employed. Additionally, we developed an external polyethylene terephthalate glycol (PETG) 3D-printed platform to house the PVA grafts in parallel. The assembled platform (PETG and PVA graft) was connected to both an inlet and an outlet to facilitate the passage of an aqueous flow through the internal section of the PVA grafts during a flow test conducted under simulated body conditions (vacuum and blood pressure: 40 mbar). The flow was induced by a vacuum pump connected to the outlet of the platform, while the inlet was connected to a feeding glass. In summation, we have established a suitable protocol for producing small vascular grafts and demonstrated that the optimization process could significantly affect graft properties.

Color-tunable ultralong-lifetime room temperature phosphorescence using phenylalanine derivative doped poly(vinyl alcohol) films

Doping chromophores in polymer matrixes to deliver room temperature phosphorescence (RTP) is well established. However, there are few examples of polymer-based RTP materials with ultralong phosphorescent lifetimes (>4 s) and afterglow (>30 s) under ambient conditions. We report a series of ultralong-lived RTP films by doping Phenylalanine (Phe) derivatives in a poly (vinyl alcohol) (PVA) matrix. The phosphorescence lifetime and efficiency of these films can be increased by introducing pentaerythritol (PER), an effect that is attributed to enhanced hydrogen-bonding interactions. The Fmoc-L-Phe@PER/PVA film exhibits a phosphorescence lifetime of 4.42 s and an afterglow duration of 46 s. Co-doping the PVA system with (Rhodamine B and Sulforhodamine B sodium salt) fluorescent dyes allows an adjustment of the afterglow from blue to red and pink. These films have been successfully applied in flexible luminescent materials, silk-screen printing, and multicolor afterglow light-emitting diode (LED) arrays.

Electrofluorochromic Hydrogels by Oligothiophene-Based Color-Tunable Fluorescent Dye Doping.

Soft electronic materials hold great promise for advancing flexible functional devices. Among the various soft materials available, hydrogels are particularly attractive for soft electronic device development due to their inherent properties, including transparency, shape adaptability through swelling/deswelling, and self-healing capabilities. Transparent hydrogels contribute to the creation of advanced smart devices such as sensors, smart windows, and anticounterfeiting technologies. Poly(vinyl alcohol) hydrogels are used as a platform for creating electrofluorochromic (EFC) devices in combination with oligothiophene-conjugated benzothiazole derivatives (OCBs) as fluorescent emitters. OCBs demonstrated excited-state intramolecular proton transfer (ESIPT) behavior with a large Stokes shift and emission changes responsive to solvent polarity and pH stimuli. Even in the solid state, OCBs exhibited strong fluorescence emission across a wide range of colors from blue to red, making them exceptionally well-suited for EFC device development. Their quantum yields in the powder state were obtained between 2.3% and 19.9%. Through the incorporation of OCBs into a PVA hydrogel (OCB@PVA), we achieved the successful fabrication of flexible EFC devices, including electronic paper and smart panels. When electric potentials (-2.4 and +2.4 V) were applied in OCB@PVA, fluorescence color changes were observed by an electrochemically induced pH change owing to electrohydrolysis of water. These devices demonstrated the potential of OCB@PVA hydrogels in the realm of flexible electronics. They could be used to create innovative and versatile devices with stimuli-responsive fluorescence properties.

Design of Polymeric Nanoparticles for Theranostic Delivery of Capsaicin as Anti-Cancer Drug and Fluorescent Nitrogen-Doped Graphene Quantum Dots.

In recent years, multifunctional nanocarriers that provide simultaneous drug delivery and imaging have attracted enormous attention, especially in cancer treatment. In this research, we designed a biocompatible fluorescent multifunctional nanocarrier for the co-delivery of capsaicin (CPS) and nitrogen-doped graphene quantum dots (N-GQDs) using the pH sensitive amphiphilic block copolymer (poly(2-ethyl-2-oxazoline)-b-poly(ε-caprolactone), PEtOx-b-PCL). The effects of the critical formulation parameters (the amount of copolymer, the concentration of poly(vinyl alcohol) (PVA) as a stabilizing agent in the inner aqueous phase, and volume of the inner phase) were evaluated to achieve optimal nanoparticle properties using Central Composite Design (CCD). The optimized nanoparticles demonstrated a desirable size distribution (167.8±1.4nm) with a negative surface charge (-19.9±0.4) and a suitable loading capacity for capsaicin (70.80±0.05%). The CPS & N-GQD NPs were found to have remarkable toxicity on human breast adenocarcinoma cell line (MCF-7). The solid fluorescent signal was acquired from cells containing multifunctional nanoparticles, according to the confocal microscope imaging results, confirming the significant cellular uptake. This research illustrates the enormous potential for cellular imaging and enhanced cancer therapy offered by multifunctional nanocarriers that combine drug substances with the novel fluorescent agents. This article is protected by copyright. All rights reserved.

A mat based on PVA doped with TiO2 nanoparticles for removal of methylene blue dye from aqueous solution and improving the carbon footprint.

Water supply is the great challenge for climate change and overpopulation. A Nanofiber mat consisting of Poly vinyl alcohol (PVA), nanoTiO2, and citric acid (PTC) was prepared using an electrospinning technique at a constant flow rate (0.5 ml/h). The morphology of the mat was detected using (FESEM) technique and image J software; they show that the mat has a Nanofiber morphology with an average diameter of 170 nanometers. This mat was used to remove methylene blue (MB) from water in two ways, the adsorption process and by photodegradation using UV light. The kinetic study of the adsorption of methylene blue MB on a PTC mat was carried out. results show that the pseudo-second order is best to describe the adsorption, of MB and the Intra- particle diffusion is the rate determining step. Seven isotherm models; four of two-parameters and three of three-parameters were used to examine the adsorption experimental data by applying linear and non-linear regression method using six error functions. The results showed comparable data between linear and non-linear regression methods for two parameters isotherms, and the best isotherm fitting with the data were Freundlich and Temkin models. On the contrary, three parameters isotherms showed distracted data between linear and non-linear regression methods. In addition, the results appear that the best predictive error function was ꭓ2.

Fully upgrade bamboo biomass into three multifunctional products through biphasic γ-valerolactone and aqueous phosphoric acid pretreatment

In this manuscript, three components of lignocellulosic biomass were obtained by deconstructing bamboo with γ-valerolactone-H2O biphasic system, and the delignification rate of 80.92 % was achieved at 120 °C for 90 min. Lignin nanospheres with diameters ranging from 75 nm to 2 um could be customized by varying the self-assembly rate. Furthermore, the lignin nanospheres-poly(vinyl alcohol) film was prepared by cross-linking lignin nanospheres and poly(vinyl alcohol), which can obtain 90 % ultraviolet absorption capacity, while the light transmittance in non-ultraviolet band was almost unchanged. At the same time, due to the strong hydrogen formation between lignin nanospheres and poly(vinyl alcohol) bond network, the tensile properties of the composite film were also improved by 30 %. Besides, the high specific surface area of biomass-derived porous biochar (2056 m2/g) can be obtained after carbonization of solid residues at 850 °C for 2 h, which was almost 8 times the specific surface area of the direct biomass carbonization due to the removal of lignin and hemicellulose. biomass-derived porous biochar can be used as an adsorbent, with a CO2 capture capacity of 4.5 mmol g−1 at normal temperature (25 °C, 1 bar). The filtrate after the reaction contained a large amount of hemicellulose oligomers, which can be reacted with dichloromethane at 170 °C for 1 h to obtain the furfural yield of 74 %. In summary, the proposed biorefinery scheme achieves a full-component upgrade of lignocellulose and can be further applied in various downstream fields.

Quantifying Chemical Reactions and Interfacial Properties at Buried Polymer/Polymer Interfaces.

Maleic anhydride (MAH)-modified polymers are used as tie layers for binding dissimilar polymers in multilayer polymer films. The MAH chemistry which promotes adhesion is well characterized in the bulk; however, only recently has the interfacial chemistry been studied. Sum frequency generation vibrational spectroscopy (SFG) is an interfacial spectroscopy technique which provides detailed information on interfacial chemical reactions, species, and molecular orientations and has been essential for characterizing the MAH chemistry in both nylon and ethyl vinyl alcohol copolymer (EVOH) model systems and coextruded multilayer films. Here, we further characterize the interfacial chemistry between MAH-modified polyethylene tie layers and both EVOH and nylon by investigating the model systems over a range of MAH concentrations. We can detect the interfacial chemical reaction products between MAH and the barrier layer at MAH concentrations of ≥0.022 wt % for nylon and ≥0.077 wt % for EVOH. Additionally, from the concentration-dependent reaction reactant/product SFG peak positions and the product imide or ester/acid C═O group tilt angles extracted from the polarization-dependent SFG spectra, we quantitatively observe concentration-dependent changes to both the interfacial chemistry and interfacial structure. The interfacial chemistry and molecular orientation as a function of MAH concentration are well correlated with the adhesion strength, providing important quantitative information for the future design of MAH-modified tie layers for a variety of important applications.

Enhanced Atmospheric Water Harvesting Performance by Three-Dimensional Carbon Fiber Felt Structure.

Freshwater shortages and the uneven distribution of water resources are critical issues for economic development and human life, and collecting water vapor in the air is one of the important ways to alleviate these issues. In recent years, adsorption-based atmospheric water harvesting (AWH) techniques have received much attention, and the core difficulty in establishing an efficient system is to develop a highly efficient functional material for AWH. In this work, an AWH material was prepared consisting of carbon fiber felt as a three-dimensional skeleton and loaded with poly(vinyl alcohol) immobilized LiCl and graphite, as a water capture and release functional material. A 24 h water capture-3 h water release test was carried out at room temperature, showing excellent water collection ability of 0.907 g·g-1 of water at 30% relative humidity (RH) and 2.429 g·g-1 of water at 80% RH. Using a 2 h capture-2 h release cycling test, the sample demonstrated a stable water capture-release performance. An outdoor field test was conducted, showing water collection efficiencies of up to 60%. We believe that the carbon fiber felt can provide good mechanical properties and achieve a high mass loading of the functional materials, and the composite material has a simple manufacturing process and realizes energy saving and sustainable water harvesting.

The synergistic effect of PVA-based gel electrolyte and Cu2+ on the optimization of zinc anode

In practical applications, rechargeable aqueous zinc ion batteries (AZIBs) face challenges such as battery leakage and pronounced dendrite growth on the zinc anode, primarily due to the absence of superior electrolyte materials. These issues significantly impact the longevity and reliability of AZIBs. To address these problems, we have designed a novel Zn(CF3SO3)2-polyvinyl alcohol(PVA)-Cu(CF3SO3)2 gel electrolyte(CPVF) consisting of poly(vinyl alcohol) (PVA) synergized with Cu2+. This innovative electrolyte not only effectively prevents leakage, a common issue with conventional electrolytes, but also promotes the uniform deposition of zinc ions. The ordered porous structure within the PVA matrix restricts the uncontrolled growth of zinc dendrites, while the Cu2+ in the gel offer a multitude of uniform zinc-philic sites in the form of Cu0 on the zinc anode. As a result, the Zn//CPVF//Zn symmetrical battery demonstrates remarkable cycling stability, with a lifespan exceeding 1200 h at 1 mA/cm2 and 0.5 mAh/cm2. Furthermore, the Zn//CPVF//V2O5 full cell retains 82.6 % of its capacity after 500 cycles at 1 A/g. The research results provide guidance for the design and optimization of high-performance and low-cost AZIBs electrolyte materials.

Modification in the Optical and Dielectric Characteristics of Poly (Vinyl Alcohol)/Carboxymethyl Cellulose Blended Polymers Doped with Two Phases Nanocomposites for Application in Optoelectronic and Energy Storage Devices

Nanocomposite films comprised of poly (vinyl alcohol) (PVA) and carboxymethylcellulose (CMC) were fabricated via a solution casting procedure, with the incorporation of (1-x)CuCo2O4/xZnMn2O4. Our research described here was aimed to explore the impact of the (1-x)CuCo2O4/xZnMn2O4 on the structural, optical and electrical features of the PVA/CMC blended polymer, using various techniques. The different phases formed (CuCo2 O4 and/or ZnMn2O4) in (1-x) CuCo2O4/x ZnMn2O4 filler samples were identified applying Rietveld refinement analysis. The structures and morphologies of the PVA/CMC/(1-x)CuCo2O4/xZnMn2O4 blend composites were determined using X-ray diffraction and scanning electron microscopy techniques. Their various linear and nonlinear optical parameters were examined using the diffused reflectance technique. The blended polymer composite with x = 0.1 displayed the highest absorbance. The transmittance of the PVA/CMC blend declined from 91 to 69% when it was loaded with a nanocomposite containing 10% ZnMn2O4. The optical band gaps of the doped blend composites had their lowest values, 5.45 eV for direct transition and (4.83, 2.99, 2.31) eV for the indirect transition, as the blend was loaded with the fillers containing 10 and 15% ZnMn2O4. The study also explored the influence of the (1-x)CuCo2O4/x ZnMn2O4 on the fluorescence spectra and chromaticity diagram of the PVA/CMC blend. The effect of the filler on the complex dielectric constant, complex electric modulus, ac conductivity and electrical storage energy of the host blend was examined. The obtained characteristics imply potential utility of the doped blends in photocatalytic, UV-blocking, UV-filtering, optoelectronic, electrical storage, nonlinear optical and photonic applications.