Nanoparticles influence miscibility in LCST polymer blends: from fundamental perspective to current applications

Muzata, Tanyaradzwa Sympathy; Jagadeshvaran, P L; Bose, Suryasarathi

doi:10.1039/d0cp01814g

Cited by 18 publications

(9 citation statements)

References 143 publications

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“…46 The smaller size of NPs compared to the radius of gyration of the PVDF polymer enhances the polymer−NPs interaction and lowers the mixing enthalpy due to the low polymer−polymer chain interface. 47 From Figure 1a, it is observed that the average size of ZnO NPs is ca. ∼20 nm, which is smaller than the radius of gyration of the PVDF polymer.…”

Section: Resultsmentioning

confidence: 99%

“…They showed that the polymer swells if the NPs are properly dispersed and the size is less than the radius of gyration R g of PVDF (∼27.5 nm) . The smaller size of NPs compared to the radius of gyration of the PVDF polymer enhances the polymer–NPs interaction and lowers the mixing enthalpy due to the low polymer–polymer chain interface . From Figure a, it is observed that the average size of ZnO NPs is ca.…”

Section: Results and Discussionmentioning

confidence: 99%

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Zinc Oxide Nanoparticles Coated with (3-Aminopropyl)triethoxysilane as Additives for Boosting the Dielectric, Ferroelectric, and Piezoelectric Properties of Poly(vinylidene fluoride) Films for Energy Harvesting

Chandran

Varun

Karumuthil

et al. 2021

ACS Appl. Nano Mater.

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In this study, we report the synergistic role of (3-aminopropyl)triethoxysilane (APTES) functionalization of zinc oxide (ZnO) nanoparticles and low-temperature phase-inversion for boosting the polar β-phase of the poly(vinylidene fluoride) (PVDF) nanocomposite. The electroactive crystal phase was investigated with Fourier transform infrared, wide-angle X-ray diffraction, differential scanning calorimetry, dielectric spectroscopy, and dynamic contact mode electrostatic force microscopy. Our results confirm an enhanced polar β-phase and crystallinity, which inherently boosted the overall dielectric, ferroelectric, and piezoelectric properties of the PVDF/ZnO-APTES nanocomposite. The energy-harvesting potential of the nanocomposite was investigated by fabricating a piezoelectric device. The fabricated device with a high electroactive phase (PDVF/ZnO-APTES) exhibited a voltage of 125 V and an instantaneous output power density of ∼83 mW/cm 3 . The fabricated device can glow 8 lightemitting diodes (LEDs), blink 50 LEDs and could be a potential candidate for energy-scavenging applications.

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Zinc Oxide Nanoparticles Coated with (3-Aminopropyl)triethoxysilane as Additives for Boosting the Dielectric, Ferroelectric, and Piezoelectric Properties of Poly(vinylidene fluoride) Films for Energy Harvesting

Chandran

Varun

Karumuthil

et al. 2021

ACS Appl. Nano Mater.

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“…Polymeric materials are now more widely used than steel and ceramics owing to their low cost, ease of processability, and rust resistance. 1,2 The main drawback of polymer-based materials is that they are prone to UV damage from various sources. Inferior resistance to UV radiation may limit their use in applications such as packaging.…”

Section: Introductionmentioning

confidence: 99%

An overview of recent advances in polymer composites with improved UV‐shielding properties

Muzata

Gebrekrstos

Orasugh

et al. 2023

J of Applied Polymer Sci

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Owing to their competitive price, ease of processability, and rust resistance, polymers are the most extensively used materials in everyday life. However, consistent exposure to ultraviolet (UV) radiation can lead to the degradation and discoloration of polymeric materials. Various polymer composites containing inorganic and organic nanoparticles (NPs) have been developed to improve the UV‐shielding properties of neat polymers. However, the most used UV‐shielding inorganic NPs are prone to photocatalytic processes, leading to further polymer chain degradation. To overcome this challenge, organic NPs have been used; however, they easily agglomerate, decreasing the UV‐shielding performance of the polymer composites. Herein, we critically report the fundamentals of the UV‐shielding mechanism and the synthesis methods, surface modification, and characterization of the most important inorganic and organic UV‐shielding NPs. We then summarize the various processing techniques used to disperse NPs in polymer matrices to obtain polymer composites with improved UV‐shielding properties. Finally, we propose a broader understanding of how the NP characteristics, their interaction with polymer matrices, and the various processing methods affect the UV‐shielding performance of the obtained polymer composites. In addition, various applications of inorganic and organic NPs‐containing UV‐shielding polymer composites have been reported.

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“…After obtaining a consistent MFI in the mixed plastics, the next objective is to improve their interfacial adhesion. Polymers can either be partially miscible or immiscible, depending on their interaction at the interface. − Many polymers are immiscible, which limits their applications due to their poor mechanical properties. This issue can be resolved by adding various types of compatibilizers to enhance the interfacial adhesion between the different polymers. , For example, polymer-grafted maleic anhydride compatibilizers have been used to improve the mechanical properties of different types of polymer systems …”

Section: Introductionmentioning

confidence: 99%

Virgin-like High-Density Polyethylene from Recycled Mixed Polyolefins

Muzata,

Matuana,

Rabnawaz

2023

ACS Appl. Polym. Mater.

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Reported herein is the compatibilization of mixed polyolefins containing a rheology modifier (M-PORM) derived from municipal solid waste (MSW) by using different types of compatibilizers. One compatibilizer was produced “in situ” during reactive extrusion (REX), and the other compatibilizers were commercial styrenic block copolymer and maleated polymer-based compatibilizers. Both “in situ” and commercial compatibilizers were first used in laboratory-controlled polyolefins containing a rheology modifier (denoted as L-PORM) and were investigated for their mechanical properties. The study was then extended to a rheology modifier containing recycled mixed polyolefins (M-PORM), where the effects of both compatibilizers were evaluated. Compared to the in situ and other commercial compatibilizers, the styrenic block copolymer offered superior performance, as it enabled the synthesis of virgin-like high-density polyethylene (HDPE) from the M-PORM. The findings suggest that M-PORM can be transformed into blends with virgin HDPE-like properties, thus offering an industrially relevant approach for the re- and upcycling of mixed polyolefins. The M-PORM pellets with uniform MFI and good mechanical properties can be used as injection mold feedstocks for different applications such as in the construction and automotive sectors.

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Nanoparticles influence miscibility in LCST polymer blends: from fundamental perspective to current applications

Abstract: Polymer blending is an effective method which can be used to fabricate new versatile materials with enhanced properties. Blending of two polymers can either result in a miscible or immiscible...

Cited by 18 publications

References 143 publications

Zinc Oxide Nanoparticles Coated with (3-Aminopropyl)triethoxysilane as Additives for Boosting the Dielectric, Ferroelectric, and Piezoelectric Properties of Poly(vinylidene fluoride) Films for Energy Harvesting

Zinc Oxide Nanoparticles Coated with (3-Aminopropyl)triethoxysilane as Additives for Boosting the Dielectric, Ferroelectric, and Piezoelectric Properties of Poly(vinylidene fluoride) Films for Energy Harvesting

An overview of recent advances in polymer composites with improved UV‐shielding properties

Virgin-like High-Density Polyethylene from Recycled Mixed Polyolefins

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