文章摘要
徐桂明,朱丽珺.PVA/P(AA-AM)/Urea半互穿高吸水树脂的合成及性能[J].精细化工,2019,36(11):
PVA/P(AA-AM)/Urea半互穿高吸水树脂的合成及性能
Synthesis and Properties of PVA/P(AA-AM)/Urea Semi-interpenetrating Super Absorbent Resin
投稿时间:2019-03-09  修订日期:2019-05-24
DOI:
中文关键词: 聚乙烯醇  半互穿  高吸水树脂  尿素  缓释
英文关键词: polyvinyl alcohol  semi-interpenetrating  super absorbent resin  urea  sustained release
基金项目:江苏高校优势学科建设工程资助项目,PAPD;国家重点研发计划项目(2017YFC0505502);国家林业公益性行业科研专项(201104055)
作者单位E-mail
徐桂明 南京林业大学理学院 1416693485@qq.com 
朱丽珺 南京林业大学理学院 lxyzlj@njfu.edu.cn 
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中文摘要:
      以聚乙烯醇(PVA)、丙烯酸(AA)、丙烯酰胺(AM)、尿素(Urea)为原料,过硫酸钾(KPS)为引发剂,N,N’-亚甲基双丙烯酰胺(MBA)为交联剂,采用水溶液聚合法合成了具有尿素缓释功能的PVA/P(AA-AM)/Urea复合高吸水树脂。通过FTIR、TG、DSC、SEM对树脂的结构进行了表征,并从吸水倍率、吸水速率、尿素释放率等方面对树脂进行了性能测定。通过单因素实验探讨了PVA用量、AM用量、KPS用量、MBA用量、尿素用量、AA中和度对树脂吸水倍率的影响。结果表明:AA质量为10.0g,以AA质量为基准,加入10%AM 、15%PVA 、0.4%KPS、0.05%MBA ,尿素质量10.0克,AA中和度为70%时合成的吸水树脂吸水倍率可达到505g/g,吸盐水倍率可达到88g/g;此条件下合成的高吸水树脂初始吸水速率可达86.58g?min/g;将树脂在湿度10%,温度25℃和40℃的烘箱中静置4h,释水率分别为40.9%和68.0%;树脂中的尿素在蒸馏水中可持续缓释13d左右,弱酸性和中性环境有利于尿素持续释放。
英文摘要:
      A PVA/P(AA-AM)/Urea composite superabsorbent resin with urea sustained-release function has been synthesized via aqueous solution polymerization using polyvinyl alcohol (PVA), acrylic acid (AA), acrylamide (AA) and urea as the raw materials, potassium persulfate (KPS) as initiator, and N, N’-methylene diacrylamide (MBA) as crosslinking agent. The resultant resin was characterized by FTIR, TG, DSC and SEM. Its properties such as water absorption ratio, water absorption rate and urea release have been measured. The effects of PVA dosage, AM dosage, urea dosage, KPS dosage, MBA dosage and AA neutralization degree on the water absorption ratio of the resin were studied through the single-factor experimental design. The results showed that when AA quality was 10.0g, and AA quality was taken as the benchmark, 10%AM, 15%PVA, 0.4%KPS, 0.05%MBA were added, urea quality was 10.0g, and AA neu-tralization degree was 70%, the synthetic water absorption resin water absorption rate reached 505g/g, saltwater absorption rate reached 88g/g; And the initial water absorption rate of the synthetic super ab-sorbent resin could reach 86.58g?min/g. Under the conditions of humidity of 10% and temperature of 25℃ and 40℃, water release ratio of the resin were 40.9% and 68.0% respectively. Urea in the resin could be sustainably released for 13d in distilled water, and the weak acidity and neutral environment are con-ducive to the sustained release of urea.
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