Bio-based Interpenetrating Network Polymer Composites from Locust Sawdust as Coating Material for Environmentally Friendly Controlled-Release Urea Fertilizers

2016 ◽  
Vol 64 (28) ◽  
pp. 5692-5700 ◽  
Author(s):  
Shugang Zhang ◽  
Yuechao Yang ◽  
Bin Gao ◽  
Yongshan Wan ◽  
Yuncong C. Li ◽  
...  
Keyword(s):  
Controlled Release ◽  
Polymer Composites ◽  
Environmentally Friendly ◽  
Coating Material ◽  
Interpenetrating Network ◽  
Network Polymer ◽  
Controlled Release Urea

Synthesis of Biodegradable Mixing-Polymer as Coating Material for Controlled-Release Urea Fertilizer

2019 ◽  
Vol 1152 ◽  
pp. 43-51 ◽  
Author(s):  
Huu Trung Nguyen ◽  
Van Dat Doan ◽  
Van Dung Trinh
Keyword(s):  
Controlled Release ◽  
Low Cost ◽  
Coating Material ◽  
Urea Fertilizer ◽  
Bonding Structure ◽  
Physico Chemical ◽  
Coating Method ◽  
Urea Release ◽  
Kinetics Of ◽  
Controlled Release Urea

The biodegradable mixing-polymer as low cost, environmentally friendly coating material for controlled-release urea fertilizer was synthesized by borax crosslinked phosphated distarch phosphate (PDSP)/polyvinyl alcohol (PVA) and polyacrylic acid (PAA) via pan coating method. The physico-chemical characteristics of biodegradable mixing-polymer were confirmed by FTIR, TGA and SEM techniques. The kinetics of urea release were also carefully investigated in water and soil. It’s been found that a uniform layer with better bonding structure was created on surface of the mixing-polymer PDSP/PVA-PAA and the time released 70% urea reached 6 hours in water and more than 27 days in soil.

Optimization of Pan Coating Process for Increased Efficiency of Controlled-Release Urea Fertilizer

2021 ◽  
Vol 57 (4) ◽  
pp. 333-342
Author(s):  
Trung Huu Nguyen ◽  
Tran Nguyen Minh An ◽  
Mahboob Alam ◽  
Duc Hoai Tran ◽  
Nghi Tran ◽  
...  
Keyword(s):  
Controlled Release ◽  
Layer Thickness ◽  
Release Time ◽  
Coating Process ◽  
Analysis Method ◽  
Sauter Mean Diameter ◽  
Urea Fertilizer ◽  
The Relationship ◽  
Central Composite ◽  
Controlled Release Urea

The goal of the research is to develop an experimental mathematical model of pan coating process effect on the biodegradable polymer and to determine optimal process parameters. The polymer solution was conducted with phosphated di-starch phosphate, polyvinyl alcohol, and polyacrylic acid and performed as material coating for the controlled-release urea fertilizer. The image analysis method has been used to determine the particle size distribution, Sauter mean diameter of the particle and layer thickness that is novel. The central composite rotatable design has been selected to determine the regression models of the process, which described the relationship between two objective variables as layer thickness, release time with angle of pan, spray flow, and coating time. The statistical analysis results indicate the fitness of model.

Increasing the apparent shear viscosity of polymer composites by uptake of a small amount of water

RSC Advances ◽  
2014 ◽  
Vol 4 (47) ◽  
pp. 24686-24691 ◽  
Author(s):  
Dapeng Wang ◽  
Xiang Wang ◽  
Yuan Yuan ◽  
Weihua Li ◽  
Huiwen Tian ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Shear Viscosity ◽  
Environmentally Friendly

We provided a reversible, simple, inexpensive and environmentally-friendly way to control the rheology of polymer composites.

The effects of controlled release urea on maize productivity and reactive nitrogen losses: A meta-analysis

2019 ◽  
Vol 246 ◽  
pp. 559-565 ◽  
Author(s):  
Wushuai Zhang ◽  
Zhengyuan Liang ◽  
Xiaoming He ◽  
Xiaozhong Wang ◽  
Xiaojun Shi ◽  
...  
Keyword(s):  
Controlled Release ◽  
Meta Analysis ◽  
Nitrogen Losses ◽  
Reactive Nitrogen ◽  
Maize Productivity ◽  
Controlled Release Urea

scholarly journals Reducing nitrogen pollution while improving tomato production by controlled-release urea application

2018 ◽  
Vol 64 (5) ◽  
pp. 632-641 ◽  
Author(s):  
Jungang Yang ◽  
Shangqiang Liao ◽  
Yanmei Li ◽  
Bing Cao ◽  
Yanxin Sun ◽  
...  
Keyword(s):  
Controlled Release ◽  
Nitrogen Pollution ◽  
Tomato Production ◽  
Controlled Release Urea
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