商用聚丙烯酸类高吸水树脂粒子尺寸及分布与其凝胶浓度的关系  

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

作　　者：马蕊 李双双 王晓伟 付志磊 潘鸽 符波 石彤非[2] 黄以能 汤华清 李思佳 许东华[2,4] 周恒为 MA Rui;LI Shuangshuang;WANG Xiaowei;FU Zhilei;PAN Ge;FU Bo;SHI Tongfei;HUANG Yineng;TANG Huaqing;LI Sijia;XU Donghua;ZHOU Hengwei(Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matter Physics, College of Physical Science and Technology,Yili Normal University,Yining,Xinjiang 835000,China;State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;Department of Fire Commanding,China People's Police University,Langfang,Hebei 065000,China;University of Science and Technology of China,Hefei 100039,China)

机构地区：[1]伊犁师范大学物理科学与技术学院新疆凝聚态相变与微结构实验室,新疆伊宁835000 [2]中国科学院长春应用化学研究所,高分子物理与化学国家重点实验室,长春130022 [3]中国人民警察大学消防指挥系,河北廊坊065000 [4]中国科学技术大学,合肥100039

出　　处：《应用化学》2019年第7期807-814,共8页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(21274152);伊犁师范学院研究生科研创新项目(YLSF2017033);公安部技术研究计划项目(2017JSYJC04)项目资助~~

摘　　要：研究了6种商用聚丙烯酸类高吸水树脂(SAP)粒子尺寸大小及分布对其形成凝胶的临界浓度的影响,通过傅里叶变换红外光谱、X射线光电子能谱对样品的成分进行了分析,使用光学显微镜和ImageJ软件统计了样品未吸水时粒子的尺寸及分布,通过测定样品吸水后的膨胀比,估算得到了样品吸水后的粒子的尺寸及分布,用流变学方法和倒置实验法测定了高吸水树脂形成凝胶的临界浓度(凝胶点)。结果表明,这6种商用聚丙烯酸类高吸水树脂吸水后的粒子的尺寸大小对其形成凝胶的临界浓度的影响不符合理论预测,这是由于粒子尺寸分布宽度不均一造成的。在选择粒子大小分布占优的均一范围内,样品的凝胶浓度随着粒子尺寸的增大而降低。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.

关 键 词：高吸水树脂 粒径分布 凝胶浓度 流变 

分 类 号：O631[理学—高分子化学]