Lignin-xylan nanospheres prepared by green and quick method from lignocellulose and used as additive in PVA films

Xin, Qi; Li, Huiwen; Sun, Wan; Li, Xuezhi; Lu, Xianqin; Zhao, Jian

doi:10.1016/j.ijbiomac.2024.129762

Cited by 4 publications

(1 citation statement)

References 43 publications

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“…It can be seen from the figure that the tensile strength of PVA/amidated lignin films increased and then decreased with the increase of lignin dosage. The results show that the incorporation of aminated lignin increased the tensile strength and elastic modulus of PVA; this phenomenon can be explained by the generation of strong hydrogen bonding between aminated lignin and PVA [34][35][36]. In addition, due to its rigid structural component, aminated lignin can be used as a crosslinker in linearly structured polyvinyl alcohols [37].…”

Section: Stress-strain Of the Filmsmentioning

confidence: 92%

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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