Lignin–Clay Nanohybrid Biocomposite-Based Double-Layer Coating Materials for Controllable-Release Fertilizer

• DOI: 10.1021/acssuschemeng.0c06472
• Publication Date: 2020-12-15T18:17:06Z
• Authors: Shugang Zhang; Xiangju Fu; Zhaohui Tong; Guodong Liu; Shanyu Meng; Yuechao Yang; Mohamed I. D. Helal; Yuncong C. Li
• Keywords: Coated urea; Biocomposite; Environmental Pollution; Layered double hydroxides; Biopolymer

Bio-based slow-release fertilizers (SRFs) have drawn significant attention because their applications for crop production can improve nutrient utilization efficiency as well prevent environmental pollution. However, current commercial SRFs still exhibit uncontrollable release patterns, use a large quantity of synthetic coating materials, and are unable to adapt complex soil conditions (e.g., arid soil). In this study, double-layer SRF was formulated from low-cost lignin–clay nanohybrid composite not only achieve controllable slow nitrogen fertilizer but also the water-holding property. The hydrophobic cross-linked with bio-based alginate prepare core-layer material, followed by process using highly water-absorbent polymer poly(acrylic acid) (PAA) SRF. We examined chemical structures, urea rates, capacities PAA–lignin–clay coated (PLC-SRF). results showed that PLC-SRF released 13–40% less absorbed 23% more water than alginate. Its rate is slower previously reported other materials. This nanocomposite material has great potential producing new type beneficial sustainable production.