林产化学与工业2018，Vol.38Issue(2)：21-28,8.DOI:10.3969/j.issn.0253-2417.2018.02.003
木质素-聚丙烯酸钠高吸水树脂的制备及性能
Process Conditions and Performance of Polyacrylate-based Super Absorbent Resin Prepared with Lignin-related Compounds
摘要
Abstract
Lignin including alkali lignin(AL),lignosulfonate(LS),lignocresol(LC),lignoresorcinol(LR) and lignopyrogallol (LP) were grafted by acrylic acid (AA) to synthesized water-absorbent resin under aqueous solution with potassium persulfate (KPS) as initiator and N,N′-methylene-bis-acrylamide (MBA) as crosslinking agent. The morphological characteristic water-absorbing capacity and salt tolerance of different resins were compared. The effects of different lignins on the pore structure and specific surface area were studied. The swelling behaviors of the resins were fitted by the swelling kinetics model. The results indicated that the water absorption capacities of resins were according to the order of lignopyrogallol grafted polyacrylic acid resin (LP-g-PAA,2 137 g/g) >lignosulfonate grafted polyacrylic acid resin (LS-g-PAA, 1 348 g/g) >lignoresorcinol grafted polyacrylic acid resin (LR-g-PAA,1 344 g/g)>lignocresol grafted polyacrylic acid resin (LC-g-PAA, 1 262 g/g) > Alkaline lignin grafted polyacrylic acid resin (AL-g-PAA, 518 g/g)>polyacrylic acid resin (PAA, 439 g/g). The FE-SEM and BET specific surface area analyses showed that the addition of different lignins could change the pore structure and specific surface area to different degree, shich would affect the absorption. And the swelling behaviors of the resins were proved to according with Schott swelling kinetics model(R2>0.98). Salt tolerance of LP-PAA resin were affected by the valence of ion,radius of hydrated ion and concentration of ion and the results were as follows:KCl>KNO3≈LiCl>K2SO4> K2CO3> CaCl2>FeCl3.关键词
木质素/聚丙烯酸/吸水树脂/孔隙结构Key words
lignin/polyacrylic acid/water-absorbent resin/pore structure分类
化学化工引用本文复制引用
钱爽,任浩..木质素-聚丙烯酸钠高吸水树脂的制备及性能[J].林产化学与工业,2018,38(2):21-28,8.基金项目
国家重点研发计划项目(2017YFD0601005) （2017YFD0601005）
南京林业大学杰出青年基金(NLJQ2015-005) （NLJQ2015-005）
