Biodegradable poly-3-hydroxybutyrate as a fertiliser carrier

Volova, Tatiana G.; Prudnikova, Svetlana V.; Boyandin, Anatoly N.

doi:10.1002/jsfa.7621

Cited by 36 publications

(29 citation statements)

References 21 publications

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“…The present study builds on our previous work, 13 where DCD was extruded as a composite material within a biodegradable polymer matrix, namely poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyvalerate) (PHBV). This bacterial polyester has been studied extensively for the controlled release of drugs, 14–16 food packaging additives 17 and agrichemicals 18–22 due to its ability to slow the rate of water diffusion, biocompatibility and biodegradability in almost any environment, including soils, fresh water systems and oceans. Our previous study revealed that, at loading of 250 g kg −1 mobilization of DCD from the PHBV matrix occurs via four distinct mechanisms: (i) initial rapid dissolution of surface available DCD, (ii) channelling of water through voids and pores in the PHBV matrix, (iii) gradual diffusion of water and DCD through layers of PHBV, and (iv) biodegradation of the PHBV matrix 13 .…”

Section: Introductionmentioning

confidence: 99%

Designing for effective controlled release in agricultural products: new insights into the complex nature of the polymer–active agent relationship and implications for use

et al. 2020

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BACKGROUND Various active chemical agents, such as soil microbial inhibitors, are commonly applied to agricultural landscapes to optimize plant yields or minimize unwanted chemical transformations. Dicyandiamide (DCD) is a common nitrification inhibitor. However, it rapidly decomposes under warm and wet conditions, losing effectiveness in the process. Blending DCD with an encapsulating polymer matrix could help overcome this challenge and slow its release. Here, we encapsulated DCD in a biodegradable matrix of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) and investigated the effects of DCD crystal size and loading rates on release rates. RESULTS Three DCD crystal size fractions (0–106, 106–250 and 250–420 μm) were blended with PHBV at 200, 400, 600 and 800 gkg−1 loadings through extrusion processing and release kinetics were studied in water over 8 weeks. For loadings ≥ 600 g kg−1, more than 95% release was reached within the first 7 days. By contrast, at 200 g kg−1 loading only 10%, 36% and 57% of the DCD was mobilized after 8 weeks in water for 0 to 106 μm, 106 to 250 μm and 250 to 420 μm crystal size fractions, respectively. CONCLUSION The lower percolation threshold for this combination of materials lies between 200 and 400 g kg−1 DCD loading. The grind size fraction of DCD significantly affects the quantity of burst release from the surface of the pellet, particularly below the lower percolation threshold. The results presented here are likely translatable to the encapsulation and release of other crystalline materials from hydrophobic polymer matrices used in controlled release formulations, such as fertilizers, herbicides and pesticides. © 2020 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Designing for effective controlled release in agricultural products: new insights into the complex nature of the polymer–active agent relationship and implications for use

et al. 2020

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“…PHAs are synthesized by prokaryotes as energy and carbon storage; they are degraded both intracellularly and extracellularly to safe products (CO 2 and H 2 O) by soil and water microflora (Sudesh et al 2000;Jendrossek 2001). Although this is a relatively new application of PHAs, they have been successfully used to embed herbicides (Prudnikova et al 2013;Boyandin et al 2016;Volova et al 2016a,b), fungicides (Savenkova et al 2002;Volova et al 2016c,d), and nitrogen fertilizers (Volova et al 2016e).…”

Section: Discussionmentioning

confidence: 99%

Fungicidal activity of slow-release P(3HB)/TEB formulations in wheat plant communities infected by Fusarium moniliforme

Volova

Prudnikova

Zhila

2017

Environ Sci Pollut Res

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Fungicidal activity of experimental tebuconazole (TEB) formulations was investigated in laboratory soil ecosystems in wheat plant communities infected by Fusarium moniliforme. TEB was embedded in the matrix of poly-3-hydroxybutyrate, shaped as films and microgranules. These formulations were buried in the soil with wheat plants, and their efficacy was compared with that of commercial formulation Raxil and with the effect of pre-sowing treatment of seeds. In the experiment with the initially infected seeds and a relatively low level of natural soil infection caused by Fusarium fungi, the effects of the experimental P(3HB)/TEB formulations and Raxil were comparable. However, when the level of soil infection was increased by adding F. moniliforme spores, P(3HB)/TEB granules and films reduced the total counts of fungi and the abundance of F. moniliforme more effectively than Raxil. Seed treatment or soil treatment with Raxil solution showed an increase in the percentage of rot-damaged roots in the later stages of the experiment. In the early stage (between days 10 and 20), the percentage of rot-damaged roots in the soil with TEB embedded in the slowly degraded P(3HB) matrix was similar to that in the soil with Raxil. However, the efficacy of P(3HB)/TEB formulations lasted longer, and in later stages (between days 20 and 30), the percentage of rot-damaged roots in that group did not grow. In experiments with different TEB formulations and, hence, different fungicidal activities, the increase in plant biomass was 15-17 to 40-60% higher than in the groups where TEB was applied by using conventional techniques.

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“…Hydroxybutyrate-co-hydroxyvalerate copolymers were used as carriers for the herbicides atrazine and ametryn [12][13][14]. A series of studies described P(3HB) microparticles, granules, films, and pellets loaded with the herbicide metribuzin and the fungicide tebuconazole; release kinetics of the active ingredients and degradation of the polymer matrix were investigated in soil microecosystems [15][16][17]. The efficacy of the formulations was evaluated in laboratory wheat ecosystems contaminated with weeds and infected with fusarium pathogens [18][19].…”

Section: Introductionmentioning

confidence: 99%

Thermal, mechanical and biodegradation studies of biofiller based poly-3-hydroxybutyrate biocomposites

Thomas

Shumilova

Kiselev

et al. 2020

International Journal of Biological Macromolecules

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Biodegradable poly-3-hydroxybutyrate [P(3HB)] and natural materials (fillers)clay, peat, and birch wood powderwere used to prepare powdered blends and, then, pellets and granules. Pellets were produced by cold pressing of polymer and filler powders; granules were produced from the powders wetted with ethanol. Properties of initial P(3HB) and fillers and blends thereof were studied using IR spectroscopy, DSC, X-ray analysis, and electron microscopy. No chemical bonds between the components were revealed: the blends were physical mixtures. The degree of crystallinity of the blends was lower than that of the initial polymer, suggesting different crystallization kinetics of the blends. Introduction of increasing amounts of the fillers into the polymer progressively decreased mechanical strength of the pellets, as confirmed by the decrease in Young's modulus. The study of degradation of the blends in soil showed that the mass loss of the blends over 35 days of incubation in soil varied between 30 and 50% of the initial mass of the products, depending on the type of the filler.

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Biodegradable poly-3-hydroxybutyrate as a fertiliser carrier

Cited by 36 publications

References 21 publications

Designing for effective controlled release in agricultural products: new insights into the complex nature of the polymer–active agent relationship and implications for use

Designing for effective controlled release in agricultural products: new insights into the complex nature of the polymer–active agent relationship and implications for use

Fungicidal activity of slow-release P(3HB)/TEB formulations in wheat plant communities infected by Fusarium moniliforme

Thermal, mechanical and biodegradation studies of biofiller based poly-3-hydroxybutyrate biocomposites

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