摘要
以腐植酸（HmA）和丙烯酸（AA）为原料，N，N’-亚甲基双丙烯酰胺（MBA）为交联剂，过硫酸铵（APS）为引发剂，采用自由基共聚反应，通过正交实验合成出了多孔型的腐植酸吸水性树脂（HmA—PAA），研究了多种因素对腐植酸吸水性树脂吸水倍率的影响，其较佳的合成工艺条件为m（NaHm溶液）：m（AA）=1．65～1．70；n（APS）：n（AA）=（0．8～1．1）×10^-3；”（MBA）：n（AA）=（0．3～0．5）×10^-3；NaOH中和度为75％；反应温度为65℃；反应时间2h．实验结果表明：合成出的HmA—PAA对蒸馏水和生理盐水（w为0．9％的NaCl水溶液）的吸水能力分别达到650g/g和52g/g，与相同条件下所合成的聚丙烯酸吸水性树脂相比，由于腐植酸分子的引入，有效地提高了聚丙烯酸盐类体系吸水、耐盐及耐温能力，具有较高的使用价值。
Porous humic acid resin is synthesized by free radical polymerization,with humic acids and crylic acid being used as raw materials,N,N'-methylenebisacrylamid (MBA) as crosslinker,and ammonium persulfate as initiator.The optimum reaction conditions are determined by orthogonal experiments,i.e.,m(the solution of (NaHm)∶m(AA)=1.65～1.70,n(initiator)∶n(AA)=(0.8～1.1)×10-3,n(MBA)∶n(AA)=(0.3～0.5)×10-3,neutralizing degree of NaOH is 75%,reaction temperature is 65 ℃,and reaction time is 2 h.The water absorbency of humic acid resin is discussed.The results show that the distilled water absorbency of it is 650 g/g,and the saline water (0.9%NaCl) absorbency of it is 52 g/g.Compared with the polyacrylic acid resin synthesized under the same conditions,the water-absorbing capacity,salt resistance and heat resistance of the porous humic acid resin are enhanced due to the existence of humic acid.Therefore it has better application value.
出处
《西安石油大学学报（自然科学版）》
CAS
2008年第4期53-56,61,共5页
Journal of Xi’an Shiyou University（Natural Science Edition）
关键词
风化煤
腐植酸
腐植酸树脂
丙烯酸
吸水倍率
leonardite
humic acids
humic acids resin
crylic acid
water-absorbing capacity
