Size adjustment of spherical temperature-sensitive hydrogel beads by liquid–liquid dispersion using a Kenics static mixer |
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| Authors: | Hideo Tajima Yuta Yoshida Satoko Abiko Kazuaki Yamagiwa |
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| Affiliation: | 1. Graduate School of Science & Technology, Niigata University, 2-8050 Ikarashi, Niigata 950-2181, Japan;2. Department of Chemistry and Chemical Engineering, Niigata University, 2-8050 Ikarashi, Niigata, Japan;1. School of Chemical Engineering, University of Birmingham, B15 2TT, UK;2. Johnson Matthey Technology Centre, Billingham TS23 1LB, UK;1. Department of Chemical Engineering, McMaster University, Hamilton, ON, Canada L8S 4L7;2. Suncor Energy Inc., PO Box 2844, 150 6 Avenue SW, Calgary, AB, Canada T2P 3E3;1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, PR China;2. Huadong Design Branch of China Petroleum Engineering & Construction Corp., No. 2, Huayan Road, Qingdao, Shandong 266071, PR China;3. National Engineering Research Center for Distillation Technology, Tianjin University, Tianjin, PR China;1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, PR China;2. Institute for Clean and Secure Energy, Department of Chemical Engineering, University of Utah, Salt Lake City 84112, USA;1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China;2. School of Biomedical Science and Engineering, National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou International Campus, Guangzhou 510006, China;1. Laboratory of Biomedical Materials Engineering, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, PR China;2. College of Environment and Chemical Engineering, Dalian University, Dalian Economic Technological Development Zone, Dalian 116622, PR China;3. Laboratory of Optical Fabrication and Coating, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China;4. University of the Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | Temperature-sensitive hydrogel beads were prepared by Kenics static mixer technology. The temperature-sensitive monomer N,N-diethylacrylamide and photo-crosslinkable pre-polymer ENT were used as model hydrogel materials. Drop dispersion of high viscosity polymer material in low viscosity hexadecane was made using the static mixer. Drops of a solution of the mixed materials were rapidly photo-crosslinked by UV irradiation after mixing in the static mixer, and spherical hydrogel beads with narrow, normal size distribution were thus prepared. The Kenics static mixer is a useful device for the preparation of spherical beads of temperature-sensitive hydrogels. The Sauter Mean Diameter of the hydrogel beads swollen in deionized water at 293 K was measured. The experimentally determined dimensionless swollen hydrogel bead diameter was well correlated with the Weber number, degree of swelling and viscosity ratio. The effects of gelation and ENT addition on the bead size were evaluated from the degree of swelling. The correlation equation can be used for size adjustment of temperature-sensitive spherical hydrogel beads. |
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