包裹法控制高吸水树脂初期吸水速率的研究

针对高吸水树脂颗粒作为调剖堵水材料膨胀速度过快的缺点,为控制其初期吸水速率,用两种包裹材料(PKA、PBG)以及二者复合包裹材料(PAMG)对吸水树脂进行处理,探讨了各种因素和条件对吸水树脂初期吸水速率的影响.结果表明,PKA包裹剂质量分数为3%,在85℃下加入质量分数2%的非溶剂包裹3次,包裹后的吸水树脂在12 h内的吸水速率和没有采取包裹处理的相比下降了1.7倍,缓膨可达2天;PBG包裹剂质量分数为2%,在80℃下包裹3次,加入凝胶剂,形成的包覆颗粒初期吸水速率下降达5倍,缓膨可达3天;包裹剂PKA和PBG二者包裹次数复配为1∶2时,包裹后的吸水树脂在12 h内的吸水速率下降达17倍,缓膨可达到4天.

Study on Wrapping Methods of Control Initial Water-Absorbent Rate of Super Absorbent Resin

Be aimed at disadvantage of super-absorbent resin particles expanded too fast as a profile control material of water shut off, in order to control its initial water-absorbent rate, two wrapping materials (PKA,PBG) and their composits (PAMG) were used to deal with super-absorbent resin, discussed the influence of a variety of factors and conditions on the initial water-absorbent rate of super absorbent resin. The results showed that, when the mass concentration of PKA wrapping was 3%, and the mass concentration of non-solvent was 2%, the super absorbent resin was wrapped three times at 85℃,compared with no-wrapped ones, initial water-absorbent rate of super absorbent resin descended 1.7 times within 12 hours, the time of relieved swelling water was two days; when the mass concentration of PBG wrapping was 2%, the super absorbent resin was wrapped three times at 80℃, and then added gelata, the initial water-absorbent rate of wrapped particles descended 5 times, the time of relieved swelling water was three days; when the number of PKA and PBG wrapping was 1:2, initial water-absorbent rate of super absorbent resin which was wrapped descended 17 times within 12 hours, and the time of relieved swelling water was four days.