摘要
以腐殖酸（HA）、中和度75%的丙烯酸（AA）、尿素（UREA）为原料,过硫酸钾为引发剂,N,N＇-亚甲基双丙烯酰胺为交联剂,采用水溶液聚合法制备具有互穿网络结构的功能性缓释保水材料。并采用FTIR、SEM、DSC和压力势法等对产物的结构和性能进行表征和测试,探讨了单体配比、尿素用量、反应温度、引发剂用量及交联剂用量对产品吸水性能及缓释性能的影响。结果表明：在聚合温度为80℃、引发剂用量为1%（即其质量占单体AA质量的百分数,下同）、交联剂用量为0.2%、HA用量为14.3%、UREA用量为50%的条件下,制得的高吸水性树脂吸自来水能力最高可达310 g/g,且具有良好的保水性能,可利用水分占总吸水量的93.81%,氮元素28 d累积释放率71.50%。
Controlled release superabsorbent polymers （HA/AA-UREA） with interpenetrating networks were prepared by solution polymerization using the partial neutralizing acrylic acid （AA）, urea（UREA） and humic acid （HA） as raw materials, N, N＇-methylenebisacrylamide as cross-linking agent and potassium persulfate as initiator, respectively. The structures and performances of products were characterized by FTIR, SEM, DSC, pressure potential method and so on. In addition, the factors affecting the water absorbency and release performances of products, such as monomer ratio, dosage of urea, reaction temperature, initiator dosage and cross-linking agent dosage were investigated. The results showed that the obtained superabsorbent resin exhibited good water absorbency and water retention performance,the maximum water absorption ability was up to 310 g/g, available water accounted for 93.81% ,and the accumulative release rate of nitrogen reached 71.50% after 30 days when the polymerization temperature was 80 ℃, the initiator dosage was 1% of AA mass （the same below）, cross-linking agent dosage, humic acid dosage and urea dosage were 0. 2%, 14. 3% and 50%, respectively.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2018年第2期194-200,共7页
Fine Chemicals
基金
陕西省农业科技专项(NYKJ-2017-01)
西安市农业科技创新计划[2017050NC/NY011(3)]
教育厅产业化项目(17JF003)~~
关键词
腐殖酸钾
丙烯酸
尿素
缓释
保水剂
功能材料
humic acid
acrylic acid
urea
slow release
superabsorbent
functional materials
