Preparation and investigation of properties of deproteinized natural rubber nanocomposites incorporating functionalized <scp>nano‐alumina</scp> by <scp>in situ</scp> emulsion polymerization

Sadeghi, Atefeh; Toiserkani, Hojjat

doi:10.1002/vnl.22002

Cited by 5 publications

(1 citation statement)

References 39 publications

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“…79-1558. 55 The NiONPs XRD spectrum (Figure 6b) revealed strong and distinct peaks at 2θ = 37.20, 43.20, 62.87, 75.18, and 79.22°that correspond to (1 1 1), (2 0 0), (2 2 0), (3 1 1), and (2 2 2) crystalline planes, respectively. These NiONP diffraction measurements corroborated the formation of a spherical crystalline phase of NiO and corresponded to the JCPDS map of NiO 04-0835.…”

Section: Sorbent Characterizationmentioning

confidence: 98%

Potent and Versatile Biogenically Synthesized Alumina/Nickel Oxide Nanocomposite Adsorbent for Defluoridation of Drinking Water

Alterary

2024

ACS Omega

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In the present work, an extract of Salvia officinalis leaves was used to synthesize an alumina/NiO nanocomposite by the coprecipitation method. First, the shape and surface content of the synthesized adsorbent were determined. Scanning electron microscopy images showed the production of nanospheres and nanorods with sizes between 35 and 50 nm. X-ray diffraction measurement revealed strong, high-intensity peaks, confirming the preparation of a highly crystalline alumina/nickel oxide nanocomposite. Then, the pure nanoalumina, nickel oxide, and functionalized alumina/nickel oxide nanocomposite for water defluoridation were investigated under various conditions, for example, stirring period, pH, and initial fluoride concentration. Defluoridation with greener alumina, nickel oxide, and alumina/nickel oxide nanocomposite lasted 120 min at adsorbent dosages of 0.8 g/L in a pH 7 solution. The adoption process for the three sorbents matches the Langmuir adsorption isotherm. The process dynamics were explored using pseudo-second-order and first-order kinetics. The water quality after treatment met drinking water requirements, proving the viability of using nanoparticles for drinking water defluoridation. This work confirmed effective water defluoridation in the crystalline phase using synthesized nanoalumina, nickel oxide, and their nanocomposite, which highlights their importance for future drinking water defluoridation.

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Section: Sorbent Characterizationmentioning

confidence: 98%

Potent and Versatile Biogenically Synthesized Alumina/Nickel Oxide Nanocomposite Adsorbent for Defluoridation of Drinking Water

Alterary

2024

ACS Omega

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Fabrication and characterization of epoxidized natural rubber nanocomposites reinforced with mercapto‐functionalized nanozirconia filler

Toiserkani

2023

Polymer Composites

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The objective of this study was to develop a new type of nanocomposite material by reinforcing epoxidized natural rubber (ENR) through the integration of mercapto‐functionalized nanozirconia (SH‐ZrO2 NPs) synthesized using a ring‐opening reaction. The ENR was prepared through the epoxidation of natural rubber (NR) using in situ generated performic acid from formic acid and hydrogen peroxide. The SH‐ZrO2 NPs were pretreated and systematically embedded into the ENR matrix via a latex‐casting process, resulting in ENR/SH‐ZrO2 nanocomposites with enhanced properties. To prevent the accumulation of nanofillers in the ENR matrix, the surface of the nanozirconia was treated with 3‐(mercaptopropyl)trimethoxysilane (MTS) to create mercapto‐terminated ZrO2 NPs (SH‐ZrO2 NPs) that were covalently attached to the ENR chains. The presence of MTS on the surface of the nanozirconia was confirmed by FTIR and thermogravimetric analysis (TGA) analyses. Structural and morphological characterization of the resulting nanocomposites was performed using standard techniques such as x‐ray diffraction (XRD), scanning electron microscopy (SEM), and TGA. The morphological studies indicated a uniform distribution of SH‐ZrO2 NPs throughout the ENR matrix. Furthermore, TGA analysis revealed that the thermal stability of the nanocomposites was improved, as evidenced by a shift in the decomposition temperature to a higher value compared to neat ENR. Overall, this work demonstrates the potential of SH‐ZrO2 NPs as an effective reinforcing agent in ENR‐based nanocomposites, with improved thermal stability and homogeneity.Highlights Enhanced nanocomposite properties: Integration of mercapto‐functionalized nanozirconia improves the performance of epoxidized natural rubber (ENR) materials. Innovative synthesis approach: SH‐ZrO2 NPs synthesized via ring‐opening reaction offer a novel method for reinforcing ENR matrices. Improved thermal stability: ENR/SH‐ZrO2 nanocomposites exhibit higher decomposition temperatures, indicating enhanced thermal stability. Uniform dispersion: Morphological studies confirm the uniform distribution of SH‐ZrO2 NPs throughout the ENR matrix. Promising reinforcing agent: SH‐ZrO2 NPs demonstrate their potential as an effective filler for ENR‐based nanocomposites, enhancing homogeneity and performance.

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Acrylated epoxidized natural rubber/functionalized organoclay hybrid networks: In‐situ production and characterization study

Toiserkani,

Rajab‐Qurchi

2024

Polymer Composites

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This study is dedicated to the fabrication of acrylated epoxidized natural rubber (AENR)/dual‐functionalized organoclay (DF‐C30B) hybrid networks using an in‐situ light‐induced crosslinking polymerization technique. The process begins with the successful synthesis of DF‐C30B, which contains methacrylate groups, achieved by reacting 3‐methacryloxypropyltrimethoxysilane (MPS) with cloisite 30B (C30B). During fabrication, DF‐C30B nanolayers are dispersed within the AENR matrix at various feed ratios, ranging from 1 to 8 parts per hundred of rubber (phr). The photocrosslinking polymerization is then initiated using 2,2‐dimethoxy‐2‐phenylacetophenone (DMPA) as the photoinitiating agent. Subsequent analysis of the nanocomposites involves evaluating their structure and morphology using established techniques such as Fourier transform infrared (FTIR) spectroscopy, x‐ray diffraction (XRD), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM). The FTIR analysis enables comparing distinct bands of the nanocomposite's components, affirming the integration and covalent attachment of nanoclay in the AENR matrix. Results from TEM and XRD illustrate the uniform distribution of DF‐C30B throughout the AENR matrix without significant agglomeration. TGA results indicate that the hybrid networks exhibit enhanced thermal stability, with degradation onset temperatures of 306°C, 308°C, 315°C, and 318°C for DF‐C30B loadings of 1, 2, 4, and 8 phr, respectively, compared to 198°C for pure AENR. Correspondingly, char residue levels increased to 4.3%, 5.6%, 7.8%, and 11.7% for the respective DF‐C30B contents. This research underscores the promising role of DF‐C30B as a strengthening component in nanocomposites based on NR, contributing to improved thermal endurance, enhanced uniformity, and offering insightful directions for future advancements.Highlights Fabricated acrylated epoxidized natural rubber (AENR)/dual‐functionalized organoclay (DF‐C30B) hybrid networks via light‐induced crosslinking polymerization. Enhanced compatibility and performance of DF‐C30B within the AENR matrix. Successful integration and stability confirmed by Fourier transform infrared spectroscopy, x‐ray diffraction (XRD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). Uniform dispersion of DF‐C30B within the matrix demonstrated by XRD and TEM. Improved thermal stability compared to neat AENR, as evidenced by TGA results.

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Preparation and investigation of properties of deproteinized natural rubber nanocomposites incorporating functionalized nano‐alumina by in situ emulsion polymerization

Cited by 5 publications

References 39 publications

Potent and Versatile Biogenically Synthesized Alumina/Nickel Oxide Nanocomposite Adsorbent for Defluoridation of Drinking Water

Potent and Versatile Biogenically Synthesized Alumina/Nickel Oxide Nanocomposite Adsorbent for Defluoridation of Drinking Water

Fabrication and characterization of epoxidized natural rubber nanocomposites reinforced with mercapto‐functionalized nanozirconia filler

Acrylated epoxidized natural rubber/functionalized organoclay hybrid networks: In‐situ production and characterization study

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