Macroporous open cell polyester amphigel using citric acid and PEO : Solvent absorption, thermal behavior, and slow release of pesticide

2020 ◽  
Vol 138 (4) ◽  
pp. 49723
Author(s):  
Dhruba Jyoti Sarkar ◽  
Najam A. Shakil ◽  
Jitendra Kumar ◽  
Virendra Singh Rana ◽  
Abhijit Kar ◽  
...  
Keyword(s):  
Citric Acid ◽  
Thermal Behavior ◽  
Slow Release ◽  
Open Cell ◽  
Solvent Absorption

scholarly journals Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating

2016 ◽  
Vol 20 (1) ◽  
pp. 37 ◽  
Author(s):  
Lili Handayani ◽  
Gunawan Djajakirana ◽  
. Darmawan ◽  
Canecio Peralta Munoz
Keyword(s):  
Citric Acid ◽  
Slow Release ◽  
Nutrient Release ◽  
Fertilizer Application ◽  
Coating Material ◽  
Distilled Water ◽  
Chitosan Coating ◽  
Slow Release Fertilizer ◽  
Low Efficiency ◽  
Nutrient Solubility

The low-efficiency problem in fertilizer application can be overcome by controlling fertilizer solubility, i.e. by rendering the fertilizer to be released gradually; such material is also known as slow-release fertilizer (SRF). This research was aimed to formulate SRF by coating technique using acrylic and chitosan as the coating material, and to evaluate fertilizer resistance to too fast disintegration, and rate of nutrient release method. The results demonstrated that fertilizer formulation containing  N, P, K, Fe, Cu, and Zn with granulation technique yielded 74% of granules with 2-5 mm in diameter. The SRFs (formulated fertilizer with acrylic or chitosan coating) were more resistant to water pounding than non-SRF. Furthermore, shaking test with distilled water or 2% citric acid, or by percolation test with distilled water showed that the SRFs had lower nutrient solubility than the non-SRFs. The results of shaking test also specifically indicated that coating with acrylic made the fertilizer more resistant to the citric acid,suggesting that this coating material would be more suitable in acidic soils. The SRFs formulated with the addition of chitosan during blending of micronutrients prior to mixing with macronutrients, granulation, and final coating exhibited lower nutrient solubility than the SRFs without the pre-coating chitosan addition. [How to Cite: Lili H, G Djajakirana, Darmawan, and CP Munoz. 2015. Slow- Release Fertilizer Formulation Using Acrylic and Chitosan Coating. J Trop Soils 19: 37-45. Doi: 10.5400/jts.2015.20.1.37][Permalink/DOI: www.dx.doi.org/10.5400/jts.2015.20.1.37]

Thermal behavior of open cell aluminum foams in forced air: Experimental analysis

Measurement ◽  
2015 ◽  
Vol 60 ◽  
pp. 97-103 ◽  
Author(s):  
Stefano Guarino ◽  
Gianluca Rubino ◽  
Vincenzo Tagliaferri ◽  
Nadia Ucciardello
Keyword(s):  
Thermal Behavior ◽  
Experimental Analysis ◽  
Aluminum Foams ◽  
Open Cell ◽  
Forced Air

scholarly journals The Effect of Mixing Method on Preparing Chitosan-Zeolite-Fe Composites on Fe(III) Release

2019 ◽  
Vol 4 (3) ◽  
pp. 205
Author(s):  
Ratu Fazlia Inda Rahmayani ◽  
Yateman Arryanto ◽  
Indriana Kartini
Keyword(s):  
Citric Acid ◽  
Slow Release ◽  
Release Behavior ◽  
Sem Images ◽  
X Ray ◽  
Infrared Spectrophotometer ◽  
Mixing Method ◽  
Zeolite Composite ◽  
Chitosan Gel ◽  
Rough Surface Morphology

<p>Preparation of an Fe(III) slow-release materials using chitosan and zeolite and evaluation of their release behavior in the 0.33 M citric acid has been done. The composite synthesis was carried out by varying the method of mixing basic ingredients. The first method was done by mixing chitosan gel, zeolite and Fe solution altogether (composite A). The second method was done by mixing chitosan gel with Fe solution and stirring, after that adding zeolite (composite B). The last method was done by interacting zeolite with Fe solution then stirring and then adding chitosan gel (composite C). The structure of the composite was characterized using an infrared spectrophotometer (FTIR), X-Ray diffractometer (XRD), and SEM. Evaluation of release in the citric acid 0.33 M for composite showed that the order of release of Fe(III) from the fastest was chitosan-Fe, composite A, composite B, composite C, zeolite-Fe with values of k are 0.049 mg/g; 0.016 mg/g; 0.015 mg/g; 0.011 mg/g; and 0.006 mg/g, respectively. The SEM images of composite showed rough surface morphology of composites due to the presence of zeolite-Fe which was not coated by the chitosan framework. Thus, it can be concluded that the chitosan-zeolite-Fe composite can be used as a Fe(III) slow-release composite but the variation of mixing method of the materials does no effect on the Fe(III) slow-release properties.</p>

THERMAL BEHAVIOR ANALYSIS OF OPEN-CELL METAL FOAMS MANUFACTURED BY RAPID TOOLING

2017 ◽  
Vol 20 (12) ◽  
pp. 1087-1096
Author(s):  
C. Zhang ◽  
J. Gardan ◽  
F. Zhu ◽  
H. Badreddine ◽  
Xiao-lu Gong
Keyword(s):  
Thermal Behavior ◽  
Behavior Analysis ◽  
Rapid Tooling ◽  
Metal Foams ◽  
Open Cell
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