Relationship Between Particle Size and Distribution of Commercial Polyacrylic Superabsorbent Resin and Its Gelation Concentration

doi:10.11944/j.issn.1000-0518.2019.07.180411

Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (7): 807-814.DOI: 10.11944/j.issn.1000-0518.2019.07.180411

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Relationship Between Particle Size and Distribution of Commercial Polyacrylic Superabsorbent Resin and Its Gelation Concentration

MA Rui^a^b,LI Shuangshuang^b,WANG Xiaowei^b,FU Zhilei^b,PAN Ge^b,FU Bo^c,SHI Tongfei^b,HUANG Yineng^a,TANG Huaqing^c,LI Sijia^c,XU Donghua^b^d^*(),ZHOU Hengwei^a^*()

^aXinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics, College of Physical Science and Technology,Yili Normal University,Yining,Xinjiang 835000,China
^bState Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
^cDepartment of Fire Commanding,China People's Police University,Langfang,Hebei 065000,China
^dUniversity of Science and Technology of China,Hefei 100039,China

Received:2018-12-26 Accepted:2019-04-09 Published:2019-07-01 Online:2019-07-02
Contact: XU Donghua,ZHOU Hengwei
Supported by:
Supported by the National Natural Science Foundation of China(No.21274152), the Graduate Research and Innovation Project of Yili Normal University(No.YLSF2017033), the Planned Project of Technical Research Planned Project of Ministry of Public Security(No.2017JSYJC04)

Abstract

Abstract:

The effects of particle size and distribution of six commercial polyacrylic superabsorbent resins(SAP) on the critical concentration of gel formation were studied. The compositions of the samples were analyzed by infrared spectroscopy and X-ray photoelectron spectroscopy. The size and distribution of particles of dry samples were counted by using polarized light microscopy and ImageJ software, and were estimated by measuring the expansion ratio of the sample after water absorption. The critical gelation concentration of these superabsorbent resins was determined by rheological method and inverted experiment. The results show that the effect of the particle sizes of the six commercial polyacrylic superabsorbent resins on gel formation is not consistent with the corresponding theoretical prediction, which is caused by the uneven width of the particle size distribution. In the uniform range dominated by particle size distribution, the critical gelation concentration of the sample decreases with the increase of particle size.

Key words: superabsorbent polymer, particle size distribution, gel concentration, rheology

MA Rui,LI Shuangshuang,WANG Xiaowei,FU Zhilei,PAN Ge,FU Bo,SHI Tongfei,HUANG Yineng,TANG Huaqing,LI Sijia,XU Donghua,ZHOU Hengwei. Relationship Between Particle Size and Distribution of Commercial Polyacrylic Superabsorbent Resin and Its Gelation Concentration[J]. Chinese Journal of Applied Chemistry, 2019, 36(7): 807-814.

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Relationship Between Particle Size and Distribution of Commercial Polyacrylic Superabsorbent Resin and Its Gelation Concentration

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