Hydrophobically modified sustainable bio-based polyurethane for controllable release of coated urea

Chen, Songling; Han, Yachun; Han, Yanyu; Liu, Hongdou; Zou, Hongtao

doi:10.1016/j.eurpolymj.2020.110114

Cited by 19 publications

(9 citation statements)

References 38 publications

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“…In order to verify the hydrophobic performance, contact angle (CA) measurements were carried out. As shown in Figure 7, the contact angle of EP-POSS was 125°, which is higher than those of other epoxy resins with hanging POSS groups and most resins, even PTFE(poly tetra fluoroethylene) [22][23][24][25][26] , indicating that EP-POSS has good hydrophobicity and can be used as a hydrophobic material. Protective coatings for solar panels have higher requirements for light transmittance.…”

Section: Hydrophobicity and Light Transmittance Testingmentioning

confidence: 91%

Hydrophobic Epoxy Caged Silsesquioxane Film (EP-POSS): Synthesis and Performance Characterization

Fang

Wang

Sun³

et al. 2021

Nanomaterials

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Hydrophobic films are widely used in aerospace, military weapons, high-rise building exterior glass, and non-destructive pipeline transportation due to their antifouling and self-cleaning properties. This paper details the successful preparation of hydrophobic epoxy caged sesquioxane (EP-POSS) via two steps of simple organic synthesis, along with studies on the effects of viscosity and reaction time on the reaction. Interestingly, the EP-POSS presented a large contact angle of 125°, indicating its excellent hydrophobicity. The surface micromorphology was observed via FE-SEM (field emission scanning electron microscopy), transmission electron microscopy (TEM), and atomic force microscopy (AFM), and the structural composition and elemental contents were analyzed via X-ray photoelectron spectroscopy (XPS) and energy-dispersive spectrometry (EDS). Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) tests showed that EP-POSS had excellent thermal properties, and the first degradation reaction occurred at 354 °C. The mechanical performance and abrasion resistance results demonstrated that EP-POSS could be used in solar panels.

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Section: Hydrophobicity and Light Transmittance Testingmentioning

confidence: 91%

Hydrophobic Epoxy Caged Silsesquioxane Film (EP-POSS): Synthesis and Performance Characterization

Fang

Wang

Sun³

et al. 2021

Nanomaterials

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“…Many studies prove that the application of coated urea significantly decrease volatilization, leaching of nitrogen and increase utilization of nitrogen. [6][7][8][9][10] In order to improve the efficiency of fertilizer, a lot of researches focus on the good method of enhance the slow release effect of coated fertilizer. 11 The main factors affecting the slow release effect of coated fertilizer are coating materials and synthetic process.…”

Section: Introductionmentioning

confidence: 99%

Waterborne polymer modified with zeolite for environment‐friendly slow‐release coated urea

Han

Chen

Xie

et al. 2023

J of Applied Polymer Sci

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In order to improve the slow‐release effectiveness of waterborne polymer coated fertilizers, an environment‐friendly coated urea was developed by zeolite and waterborne polymer of starch soluble, polyvinyl alcohol, sodium carboxymethyl cellulose, and chitosan. The properties of different mesh and content of zeolite on the membranes and the slow‐release property of coated urea were investigated. Zeolite decreased water vapor, ammonium permeability and porosity of waterborne polymer with an increased ammonium adsorption, and contributed to improve the slow‐release effectiveness of coated urea. In particular, zeolite‐modified waterborne polymer of 200 mesh and 3% content had best effect with 10.8%, 16.5%, and 59.8% decrease of water absorption capacity, water vapor permeability and ammonium permeability, 17.7% increase of water contact angles. Zeolite‐modified waterborne polymer coated urea for the coating contents of 7% had the best effect on the nutrient accumulate release rate. Therefore, zeolite‐modified waterborne polymers have potential to improve the slow‐release effectiveness of coated urea.

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“…Sustainable green materials derived from biomass resources have attracted giant attention in replacing fossil energy and petrochemical products, 1,2 where bio-based polyurethanes are widely used in controlled-release fertilizer (CRF) coating. 3−5 Bio-based polyurethane coatings control the release of nutrients by delaying nutrient dissolution by water, 6 which is conducive to coordinating nutrient supply with crop demand, thus improving utilization and reducing waste of fertilizer resources. 7−9 In recent years, many biomaterials such as castor oil, 10 lignin, 11 and starch 12 have been successfully used as biobased coatings for the production of bio-based polyurethane CRF (BPCF).…”

Section: ■ Introductionmentioning

confidence: 99%

“…Sustainable green materials derived from biomass resources have attracted giant attention in replacing fossil energy and petrochemical products, , where bio-based polyurethanes are widely used in controlled-release fertilizer (CRF) coating. − Bio-based polyurethane coatings control the release of nutrients by delaying nutrient dissolution by water, which is conducive to coordinating nutrient supply with crop demand, thus improving utilization and reducing waste of fertilizer resources. − In recent years, many biomaterials such as castor oil, lignin, and starch have been successfully used as bio-based coatings for the production of bio-based polyurethane CRF (BPCF). Many different strategies have been used to improve the controlled-release properties of BPCFs, such as overcoming hydrophilicity by replacing hydrophilic surface coatings with rough surface structures or superhydrophobic coatings with low-energy surfaces. − Interpenetrating network technology and self-healing technology can reduce the number of emerging micropores and channels present in bio-based coatings. ,, The bio-based polyurethane currently used as waterproof coatings to control the release of fertilizers has a highly cross-linked structure that is fragile and limits its industrial applications in the field of CRF coatings.…”

Section: Introductionmentioning

confidence: 99%

Bio-based Polyurethane Based on a Dynamic Covalent Network with Damage Tolerance for Controlled Release of Fertilizers

Cheng

Gao

et al. 2022

ACS Appl. Mater. Interfaces

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Bio-based polyurethanes are promising for the controlled release of nutrients and fertilizers, but their toughness and plasticity need to be improved. We developed a smooth, dense, elastic, and indestructible bio-based polyurethane (BPU) coating with a nutrient controlled release ∼150% superior, a tensile strength ∼300% higher, and a toughness ∼1200% higher than those for the original BPU coating. Through a one-step reaction of soybean oil polyols (accounting for more than 60%), isocyanate, and benzil dioxime, the dynamic covalent network based on oxime-carbamate replaces part of irreversible covalent cross-linking. The dynamic fracture-bonding reaction in the modified coating BPU can effectively promote the hydrogen bond recombination and oxime-carbamate chain migration in the coating process, which avoids the structural defects caused by coating tear and fertilizer collision. This work provides a simple and versatile strategy for building controlled-release fertilizer coatings.

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Hydrophobically modified sustainable bio-based polyurethane for controllable release of coated urea

Cited by 19 publications

References 38 publications

Hydrophobic Epoxy Caged Silsesquioxane Film (EP-POSS): Synthesis and Performance Characterization

Hydrophobic Epoxy Caged Silsesquioxane Film (EP-POSS): Synthesis and Performance Characterization

Waterborne polymer modified with zeolite for environment‐friendly slow‐release coated urea

Bio-based Polyurethane Based on a Dynamic Covalent Network with Damage Tolerance for Controlled Release of Fertilizers

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