Determination of the swelling behavior of superabsorbent polymers by a tracer-assisted on-line spectroscopic measurement |
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| Affiliation: | 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China;2. Pearl River Water Resources Institute, Pearl River Water Resources Commission, Guangzhou, 510640, China;3. National Paper Products Quality Supervision Inspection Center, Dongguan, 523080, China;1. MMRI/ CAPPA-D, Department of Chemical Engineering, McMaster University, Hamilton, Ontario L8S 4L7, Canada;2. 3M Canada Company, London, Ontario, Canada;1. College of Materials Science and Engineering, Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, Nanshan District Key Lab for Biopolymers and Safety Evaluation, Shenzhen University, Shenzhen 518060, PR China;2. Key Laboratory of Optoelectronic Devices and System of Ministry Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China;1. School of Mechanical, Aerospace and Civil Engineering, United Kingdom;2. North West Composites Centre, School of Materials, The University of Manchester, Manchester M13 9PL, United Kingdom;1. The Key Laboratory of Polymer Processing Engineering, Ministry of Education, South China University of Technology, Guangzhou 510640, China;2. Research and Development Department, Zhejiang Zhongning Silicon Company Ltd, QuZhou 324000, China;3. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China;1. Lodz University of Technology, Institute of Polymer and Dye Technology, Stefanowskiego 12/16, 90924 Lodz, Poland;2. Lodz University of Technology, Institute of General and Ecological Chemistry, Zeromskiego 116, 90-924 Lodz, Poland;1. Technische Universität Dresden, Institut für Leichtbau und Kunststofftechnik, 01062 Dresden, Germany;2. Technische Universität Dresden, Institut für Magnetofluiddynamik, Mess- und Automatisierungstechnik, 01062 Dresden, Germany;3. Anton Paar GmbH, Ostfildern-Scharnhausen, 73760, Germany |
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| Abstract: | This work reports on a method for the accurate determination of kinetic swelling behavior and properties of superabsorbent polymers by a tracer-assisted on-line spectroscopic measurement. Based on monitoring the spectral absorption of a tracer compound (blue dextran 2000) at 610 nm in a superabsorbent polymer containing solution, the swelling (water absorption) of the polymer during the process can be followed, from which the parameters in a kinetic equation can be obtained. The results showed that the data obtained by the present method has a good measurement precision and accuracy, in which the relative differences were less than 4.0% when comparing the data measured by a reference method (i.e., the tea bag method). Since the present method can perform an on-line measurement, it is much superior to the current tea bag method and therefore is very suitable to be used in the process related study for the swelling behavior of superabsorbent polymers in many applications. |
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| Keywords: | Kinetic swelling Blue dextran 2000 Superabsorbent polymers Spectroscopic UV method |
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