摘要
采用水溶液聚合法,以过硫酸钾,亚硝酸钠为引发剂,N’N-亚甲基双丙烯酰胺(MBA)为交联剂,研究了丙烯酸与秸秆质量比、引发剂用量、交联剂用量以及反应温度对玉米秸秆基高吸水性树脂性能的影响,并利用正交试验方法对制备工艺条件进行优化。结果表明,各因素影响高吸水性树脂性能的次序为反应温度>丙烯酸与秸秆的质量比>引发剂与总质量的比值;高吸水性树脂的最佳制备条件为:丙烯酸与玉米秸秆质量比为7,丙烯酸与丙烯酰胺质量比为5,交联剂占总质量的1%,引发剂占总质量的1.5%,反应时间为30 min,反应温度为65℃。经过正交试验优化后高吸水性树脂最高保水率可达235 g·g-1,7 d后保水率为82 g·g-1,说明树脂具有良好的保水性能;树脂重复利用5次时吸水率仍然可达176 g·g-1,说明该吸水性树脂具有较好的重复利用性能。
In this study,the superabsorbent resin was prepared though the aqueous solution polymerization method using potassium persulfate and sodium nitrite as initiators,N’N-methylene diacrylamide(MBA)as a crosslinker.Single-factor experiment was performed to study the influence of the ratio of MBA to raw material,initiator dosage,crosslinker dosage,and reaction temperature on the properties of super absorbent resin from corn stalk.The orthogonal experiment method was conducted to optimize the process conditions.The results showed that the significance effects of these factors was as the following order:reaction temperature>the mass ratio of acrylic acid to straw>initiator dosage.The optimized reaction conditions for the super absorbent resin production were as follows:the mass ratio of acrylic acid to corn stalk at 7,the mass ratio of acrylic acid to acrylamide at 5,1%of crosslinker of the total mass,1.5%of the initiator of the total mass,the reaction time for 30 min,and the reaction temperature at 65℃.Under the optimized reaction conditions,the initial water retention of the super absorbent resin could reach up to 235 g·g-1 and maintained 82 g·g-1 after 7 days.When the resin reused for 5 times,the water absorption could still maintain 176 g·g-1,proving the good reusability of the absorbent resin.
作者
王晨
师晓鹏
魏浩钦
郑张斌
邹彩虹
徐桂转
WANG Chen;SHI Xiaopeng;WEI Haoqin;ZHENG Zhangbin;ZOU Caihong;XU Guizhuan(College of Mechanical and Electrical Engineering,Henan Agricultural University,Zhengzhou 450002,China)
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2020年第1期81-86,共6页
Journal of Henan Agricultural University
基金
车用生物燃料国家重点实验室开放项目(KFKT2014008)。
关键词
高吸水性树脂
水溶液聚合法
玉米秸秆
保水率
super absorbent resin
aqueous solution polymerization
corn stalk
water retention
