Engineering and slow‐release properties of lignin‐based double‐layer coated fertilizer

Li, Hui; Wang, Ning; Zhang, Li; Wei, Yuanyuan; Zhang, Long; Ma, Yingxia; Ruso, Juan M.; Liu, Zhen

doi:10.1002/pat.6029

Cited by 7 publications

(2 citation statements)

References 44 publications

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“…The double-layer slow-release fertilizer (PML-SRF) achieved release equilibrium at 42 days, with an accumulated urea release rate of 85.22%. Moreover, soil water retention capacity reached 62.46% when adding 4 g of PML-SRF to 200 g of dry soil [114].…”

Section: Improved Crop Yields and Nutrient Managementmentioning

confidence: 99%

Polyelectrolytes for Environmental, Agricultural, and Medical Applications

Delgado,

Aranda,

Hernandez-Tenorio

et al. 2024

Polymers

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In recent decades, polyelectrolytes (PELs) have attracted significant interest owing to a surge in research dedicated to the development of new technologies and applications at the biological level. Polyelectrolytes are macromolecules of which a substantial portion of the constituent units contains ionizable or ionic groups. These macromolecules demonstrate varied behaviors across different pH ranges, ionic strengths, and concentrations, making them fascinating subjects within the scientific community. The aim of this review is to present a comprehensive survey of the progress in the application studies of polyelectrolytes and their derivatives in various fields that are vital for the advancement, conservation, and technological progress of the planet, including agriculture, environmental science, and medicine. Through this bibliographic review, we seek to highlight the significance of these materials and their extensive range of applications in modern times.

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Section: Improved Crop Yields and Nutrient Managementmentioning

confidence: 99%

Polyelectrolytes for Environmental, Agricultural, and Medical Applications

Delgado,

Aranda,

Hernandez-Tenorio

et al. 2024

Polymers

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“…This was then used to produce encapsulated diethylammonium phosphate (DAP), which reduced the release of N and P significantly. Li et al [16] prepared a slow-release fertilizer bilayer coating material using low-cost poly(vinyl alcohol) (PVA), with methyl cellulose (MC) as the inner coating material and bumpy clay doped into the highly absorbent polymer poly(acrylic acid) (PAA) along with poly(acrylamide) grafted with natural biodegradable lignin (PAM) as the outer coating material. The results indicated that the cumulative release of urea molecules from this coating material was 85.10%.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Application of Degradable Lignin/Poly (Vinyl Alcohol) Polymers as Urea Slow-Release Coating Materials

Liu,

Cao,

Wang

et al. 2024

Molecules

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The massive amount of water-soluble urea used leads to nutrient loss and environmental pollution in both water and soil. The aim of this study was to develop a novel lignin-based slow-release envelope material that has essential nitrogen and sulfur elements for plants. After the amination reaction with a hydrolysate of yak hair keratin, the coating formulation was obtained by adding different loadings (2, 5, 8, 14 wt%) of aminated lignin (AL) to 5% polyvinyl alcohol (PVA) solution. These formulations were cast into films and characterized for their structure, thermal stability, and mechanical and physicochemical properties. The results showed that the PVA-AL (8%) formulation had good physical and chemical properties in terms of water absorption and mechanical properties, and it showed good degradation in soil with 51% weight loss after 45 days. It is suitable for use as a coating material for fertilizers. Through high-pressure spraying technology, enveloped urea particles with a PVA-AL (8%) solution were obtained, which showed good morphology and slow-release performance. Compared with urea, the highest urea release was only 96.4% after 30 days, conforming to Higuchi model, Ritger–Peppas model, and second-order dynamic model. The continuous nitrogen supply of PVA-AL coated urea to Brassica napus was verified by potting experiments. Therefore, the lignin-based composite can be used as a coating material to produce a new slow-release nitrogen fertilizer for sustainable crop production.

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