吸水树脂吸液性能研究

Study on liquid absorption performance of water absorbing resin

为探究吸水树脂吸液性能的影响因素,首先借助扫描电子显微镜、红外光谱仪对吸水树脂的结构进行分析,然后研究了时间、温度对吸水树脂在水和模拟酸、碱汗液中吸液倍率、保水性能的影响,最后探讨了吸水树脂的重复吸液能力。结果表明:吸水树脂表面有大量凸起结构,具有较大比表面积,从而加快了其吸液速率;吸水树脂中含有亲水性酰胺基,其在去离子水和模拟酸、碱汗液中的最大吸液倍率分别约为265、50、50 g/g;影响吸水树脂吸液能力的主要因素是模拟汗液中钠离子的浓度,钠离子浓度越高其吸液能力越差,酸碱性、温度对最大吸液倍率影响较小,但温度对吸水树脂的吸液速率有影响,温度越高吸液速率越快;循环使用10次后,吸水树脂在模拟酸、碱汗液中的吸液率仍可达到87%以上。

In order to investigate the factors that affect the liquid absorption performance of water-absorbent resins,the structure of water absorbent resin was analyzed by means of scanning electron microscope and infrared spectrometer firstly.The time and temperature effects on the absorbency and water retention of water absorbent resin in water,simulated acid and alkali sweat were also explored.Analysis and discussions were carried out on the repeated absorbency of water absorbent resin.The results show that the surface of the absorbent resin has a large number of convex structures leading to a large specific surface area,increasing the liquid-absorption rate of the water-absorbent resin.The water-absorbent resin contains amide groups,and when submerged in deionized water and simulated sweat the maximum liquid absorption rates reach about 265,50 and 50 g/g,respectively.The liquid absorption is influenced by the concentration of sodium ions in sweat,and the larger the concentration the worse the liquid absorption capacity.The acidity,alkalinity and temperature have little effect on the maximum absorption rate,but the temperature affects the water absorption rate in that the higher the temperature,the higher the liquid absorption rate,and the smaller the maximum liquid absorption rate.After 10 cycles of absorption loading,the liquid absorption rate of water-absorbent resin in the simulated sweat still reaches 87%.