Characterization of nano FeIII-tannic acid modified polyacrylate in controlled-release coated urea by Fourier transform infrared photoacoustic spectroscopy and laser-induced breakdown spectroscopy |
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| Affiliation: | 1. The State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;2. University of Chinese Academy Sciences, Beijing 100049, China;1. International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam, Kerala 686560, India;2. School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala 686560, India;3. Department of Physics, Birla Institute of Technology & Science, Pilani, Hyderabad 500078, India;4. Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France;5. Department of Soil, Plant and Food Sciences, University of Bari “Aldo Moro”, Via Amendola 165/A, 70126 Bari, Italy;6. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam, Kerala 686560, India;1. Department of Forestry and Wood Technology, Faculty of Technology, Linnaeus University, Lückligs Plats 1, 35195 Växjö, Sweden;2. Czech Technical University in Prague, Faculty of Civil Engineering, Department of Building Structures, Thákurova 7, 166 29 Prague 6, Czech Republic;3. Slovenian National Building and Civil Engineering Institute, Dimičeva 12, SI-1000 Ljubljana, Slovenia;4. Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia;5. University of Ljubljana, Biotechnical Faculty, Department of Wood Science and Technology, Jamnikarjeva, 101, 1000 Ljubljana, Slovenia;3. Department of Civil Engineering, Federal University of São Carlos – UFSCar, São Carlos, São Paulo, Brazil;1. LabMAT, Department of Civil and Environmental Engineering, University of Bío-Bío, 4051381 Concepción, Chile;2. Department of Mechanical Engineering, University of the Basque Country, 48013 Bilbao, Spain;1. School of Engineering, Trinity College Dublin, College Green, Dublin 2, Ireland;2. Centre for Innovative Human Systems, Trinity College Dublin, College Green, Dublin 2, Ireland |
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| Abstract: | Polyacrylate polymer (PA) has been widely applied in coating products for decades. Recently, it has been used in controlled-release fertilizers. Nano FeIII-tannic acid modified PA (PA-Fe) provides a better nutrient controlled release performance than conventional PA. In this work, a preliminary database of molecular and elemental information about the polymer was obtained using FTIR-PAS (Fourier transform infrared photoacoustic spectroscopy) and LIBS (laser-induced breakdown spectroscopy), respectively. The PA-Fe polymer contained more hydrophobic groups (–CH3) and fewer hydrophilic groups (–COOR, –COOH) than PA. More elements were detected for PA-Fe than PA. LIBS was useful to identify and classify PA and PA-Fe samples using principal component analysis. The combination of spectroscopic results and a film formation process model explained the lower nutrient release rate of PA-Fe. These results showed the strong analytical capabilities of FTIR-PAS combined with LIBS for identifying and characterizing modified PA. |
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| Keywords: | Polyacrylate polymer Fourier transform infrared photoacoustic spectroscopy Laser-induced breakdown spectroscopy Principal component analysis |
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