Formulation and characterization of polyester-lignite composite coated slow-release fertilizers

被引：15

作者：

Abhiram, Gunaratnam ^{[1
,2
]}

Bishop, Peter ^{[1
]}

Jeyakumar, Paramsothy ^{[1
]}

Grafton, Miles ^{[1
]}

Davies, Clive E. ^{[3
]}

McCurdy, Murray ^{[4
,5
]}

机构：

[1] Massey Univ, Sch Agr & Environm, Environm Sci, Private Bag 11 222, Palmerston North 4442, New Zealand

[2] Uva Wellassa Univ, Fac Anim Sci & Export Agr, Dept Export Agr, Badulla, Sri Lanka

[3] Massey Univ, Sch Food & Adv Technol, Private Bag 11 222, Palmerston North 4442, New Zealand

[4] Verum Grp, Lower Hutt, New Zealand

[5] GNS Sci, Lower Hutt, New Zealand

来源：

JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH | 2023年 / 20卷 / 01期

关键词：

Calcium carbonate; Slow-release fertilizer; Lignite; Linseed oil; Polyester; BROWN-COAL; SOLUTE RELEASE; GROWTH; SOIL; WATER; SUPERABSORBENT; EPOXY;

D O I：

10.1007/s11998-022-00670-6

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two polyester-lignite composite coated urea slow-release fertilizers (SRFs; Poly3 and Poly5) were developed and their physicochemical properties were studied. Both these SRFs significantly (p < 0.05) extended the urea release compared to uncoated urea; Poly3 and Poly5 by 117 and 172 h, respectively. The urea release characteristics of Poly5 were further enhanced by linseed oil application (Poly5-linseed). The SEM images demonstrated the coatings were in contact with the urea and encase urea particles completely with the average coating thickness of 167.2 +/- 15 mu m. The new interactions between polyester and lignite in the composite coating were confirmed by the FTIR analysis. Polyester-calcium carbonate (Polyester-CaCO3) coated SRFs (Calc3 and Calc5) were developed using CaCO3 as a filler in place of lignite and the urea dissolution rate was compared with Poly3 and Poly5. The urea release times for the polyester-CaCO3 formulations, 48 and 72 h, were significantly (P < 0.05) lower than the polyester-lignite formulation, showing that lignite imparted greater control over release time than CaCO3. Findings from this work showed that polyester-lignite composites can be used as a coating material for SRFs. [GRAPHICS] .

引用

页码：307 / 320

页数：14

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