Preparation and Characterization of a Novel PVA/PVP Hydrogel Containing Entrapped Hydrogen Peroxide for Agricultural Applications

Malka, Eyal; Dombrovsky, Aviv; Margel, Shlomo

doi:10.1021/acsagscitech.2c00003

Cited by 10 publications

(9 citation statements)

References 36 publications

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“…The main advantage of PVA is its ability to form inter and intra molecular hydrogen bonding with chitosan 35 . Recently, a novel PVA/poly (N‐vinylpyrrolidone) (PVP) hydrogel was reported by Malka et al for entrapment and release of hydrogen peroide 36 . Polyurethane (PU) hydrogels were also prepared by varying molar mass of poly (ethylene glycol) (PEG) and investigated their effect on tomato growth.…”

Section: Introductionmentioning

confidence: 99%

Eco‐friendly three‐dimensional hydrogels for sustainable agricultural applications: Current and future scenarios

Azeem

Islam

Khan

et al. 2023

Polymers for Advanced Techs

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Modern world is searching for water efficient agriculture techniques as irrigation is becoming scarce. Limited water resources and more food demand are the two key challenges in agriculture. Hydrogels which can respond intelligently by pH, temperature, light, ionic strength, osmotic pressure, magnetic or electric field changes are termed as intelligent or smart hydrogels which are analogous to conventional hydrogels in preparatory methods and features. Lag phase, constant release and decay phase are three steps involved in release of nutrients from polymeric hydrogels. In fact, hydrogels act as little reservoirs of water and dissolve nutrients that are released in controlled manner anchored by plant roots via capillary action. Hydrogels also sustain optimum amount of water in water stress conditions and reabsorb water in moist conditions which ultimately increases seedling, seed germination, plant growth and crop yield. Fertilizer and salt release are majorly dependent upon pH and temperature followed by diffusion‐controlled mechanism. Cross‐linkers, binders and fillers play pivotal role in determining properties, architecture and hydrogel pores. In comparison to potassium (K+) and phosphate (PO4−3) ions, nitrates (NO3−1) and ammonium (NH4+1) ions exhibited faster release rate. This review spotlights application prospects of three dimensional hydrogel in agriculture. Initially, properties of hydrogels, their classification, preparatory methods, effect of natural‐synthetic‐polymer blending and role of fillers are stated. Afterward, hydrogel functioning, significance, advantages, mechanism of fertilizer release and agriculture specific applications of hydrogels are comprehensively described. In conclusion, extraordinary biocompatible, cheaper, stable, biodegradable, durable, non‐toxic and re‐wettable characteristics of hydrogel systems motivated their utilization in agronomical applications.

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Section: Introductionmentioning

confidence: 99%

Eco‐friendly three‐dimensional hydrogels for sustainable agricultural applications: Current and future scenarios

Azeem

Islam

Khan

et al. 2023

Polymers for Advanced Techs

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“…FTIR/ATR Spectra of PVA/PVP Hydrogels FTIR/ATR spectroscopy was used to assess the chemical composition of the hydrogels. The characteristics of PVA/PVP and PVA/PVP/HP (Figure 3 blue and red, respectively) were investigated by FTIR/ATR and compared in our recent manuscript [25]. The addition of thymol to the hydrogel significantly contributes to hydrogen bond interactions, as the thymol phenolic hydroxyl group [27] (O-H stretching at 3300-3360 cm −1 ) can interact with the PVP carbonyl or the PVA hydroxyl group (Figure 1B, C).…”

Section: Resultsmentioning

confidence: 99%

“…To evaluate the hydrogel contribution to HP thermal stability, HP was compared with HP entrapped in PVA/PVP hydrogel, both containing 10 w% HP. As the TGA-MS detector cannot distinguish between the oxygen that originates from HP decomposition products and water vapor, the potassium permanganate titration method [25] was applied. PVA/PVP/HP hydrogel coatings with size and weight of 4 cm 2 and 59 ± 4 mg, respectively, and HP solutions with weight of 66 mg were incubated in an air-forced laboratory oven preset to isothermal 82 • C for accelerated HP decomposition [26].…”

Section: Hp Thermal Stability In Pva/pvp/hp Hydrogel Coating and Watermentioning

confidence: 99%

Fabrication and Characterization of Hydrogen Peroxide and Thymol-Loaded PVA/PVP Hydrogel Coatings as a Novel Anti-Mold Surface for Hay Protection

et al. 2022

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Animal food source production is increasing due to the growing world population. Many sources (e.g., hay) are prone to mold development, resulting in food degradation. This study proposes an environmentally friendly anti-mold fungicide comprising hydrogen peroxide (HP) and thymol entrapped in a polyvinyl alcohol/pyrrolidone (PVA/PVP) hydrogel (PVA is biodegradable and PVP is water soluble and non-toxic) coated on a polyethylene (PE) films for preservative hay packaging. The hydrogels improved the thermal stability of the entrapped HP and thymol, resulting in a prolonged release into the hay and thereby increasing anti-mold activity. The hydrogel composition and morphology, thymol and HP thermal stability, and release rates through indirect (gas phase) contact were investigated. Fungicidal capabilities were tested, indicating wide-range efficiency against mold growth on hay with a clear advantage for the thymol-loaded hydrogels. No visual side effects were observed on hay exposed to the released fumes of HP and/or thymol. These results demonstrate the potential of thymol-loaded hydrogels as effective and safe post-harvest preservatives.

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“…15 Since its discovery in Jordan and Israel in 2014 and 2015, 14,16 respectively, ToBRFV spread to other countries, including Germany, the United States, Turkey, and China. 11,12 ToBRFV causes significant economic damage to the tomato crops, which are one of the important crops grown worldwide. 11,13 The tobacco plant Nicotiana glutinosaproduces a hypersensitive response (HR) when infected with ToBRFV, 13 resulting in necrotic local lesions (LLs) that isolate the virus and prevent it from spreading throughout the plant.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, viruses can also cause disease and food spoilage. − The tomato brown rugose fruit virus (ToBRFV) is a newly discovered plant virus that belongs to the tobamovirus family and can cause disease in tomatoes and pepper varieties lacking L resistant alleles . Since its discovery in Jordan and Israel in 2014 and 2015, , respectively, ToBRFV spread to other countries, including Germany, the United States, Turkey, and China. , …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Durable Antibiofilm and Antiviral Silane-Phosphonium Thin Coatings for Medical and Agricultural Applications

Nissim,

lline-Vul,

Shoshani

et al. 2023

ACS Omega

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Pathogens such as bacteria and viruses cause disease in a range of hosts, from humans to plants. Bacterial biofilms, communities of bacteria, e.g., Staphylococcus aureusand Escherichia coli, attached to the surface, create a protective layer that enhances their survival in harsh environments and resistance to antibiotics and the host’s immune system. Biofilms are commonly associated with food spoilage and chronic infections, posing challenges for treatment and prevention. Tomato brown rugose fruit virus (ToBRFV), a newly discovered tobamovirus, infects tomato plants, causing unique symptoms on the fruit, posing a risk for tomato production. The present study focuses on the effectiveness of silane-phosphonium thin coatings on polymeric films, e.g., polypropylene. Phosphonium has significant antibacterial activity and is less susceptible to antibacterial resistance, making it a safer alternative with a reduced environmental impact. We successfully synthesized silane-phosphonium monomers as confirmed by 31P NMR and mass spectrometry. The chemical composition, thickness, morphology, and wetting properties of the coatings were tested by Fourier-transform infrared spectroscopy with attenuated total reflectance, focused ion beam, atomic force microscopy, environmental scanning electron microscope, and contact angle (CA) measurements. The antibiofilm and antibacterial activities of the coatings were tested against S. aureus and E. coli, while the antiviral activity was evaluated against ToBRFV. The significant antibiofilm and antiviral activity suggests applications in various fields including medicine, agriculture, and the food industry.

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Preparation and Characterization of a Novel PVA/PVP Hydrogel Containing Entrapped Hydrogen Peroxide for Agricultural Applications

Cited by 10 publications

References 36 publications

Eco‐friendly three‐dimensional hydrogels for sustainable agricultural applications: Current and future scenarios

Eco‐friendly three‐dimensional hydrogels for sustainable agricultural applications: Current and future scenarios

Fabrication and Characterization of Hydrogen Peroxide and Thymol-Loaded PVA/PVP Hydrogel Coatings as a Novel Anti-Mold Surface for Hay Protection

Synthesis and Characterization of Durable Antibiofilm and Antiviral Silane-Phosphonium Thin Coatings for Medical and Agricultural Applications

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