Cellulose-based double-layer coated slow-release fertilizer and preparation method thereof
By using a cellulose-based double-layer coating structure, a composite membrane formed by an inner layer of nano-SiO2 modified cellulose and an outer layer of cellulose cross-linked material, the problems of excessively rapid nutrient release from diammonium phosphate fertilizer and the difficulty in degrading petroleum-based coating materials are solved, achieving slow-release effect and environmentally friendly fertilizer release.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HENAN AGRICULTURAL UNIVERSITY
- Filing Date
- 2026-06-03
- Publication Date
- 2026-07-17
AI Technical Summary
Existing diammonium phosphate fertilizers release nutrients too quickly, phosphorus is easily fixed in the soil, resulting in low utilization. Furthermore, petroleum-based polymer coating materials are difficult to degrade, leading to environmental pollution and high costs.
It adopts a cellulose-based double-layer membrane structure. The inner layer is a dense hydrophobic membrane of vinylsilane modified nano-SiO2-first cellulose, and the outer layer is a controllable swelling composite membrane formed by cross-linking second cellulose and natural biomass materials. Nutrient release is restricted through interfacial bonding and cross-linking network.
It achieves slow and balanced nutrient release, improves fertilizer utilization, reduces nutrient loss, meets the standards for slow-release fertilizers, and the coating material is biodegradable, reducing environmental pollution.
Smart Images
Figure CN122404074A_ABST