| 张学文,白波,何云华,王洪伦,索有瑞.SBP/P(AA-co-AM)复合高吸水树脂的溶胀及尿素缓释性能研究[J].材料导报,2016,30(10):61-66 |
| SBP/P(AA-co-AM)复合高吸水树脂的溶胀及尿素缓释性能研究 |
| Swelling and Urea Slow Release of SBP/P(AA-co-AM) Composite Superabsorbent |
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| DOI：10.11896/j.issn.1005-023X.2016.10.014 |
| 中文关键词: 沙棘枝糠粉 高吸水树脂 尿素 缓释 |
| 英文关键词: sea-buckthorn branch powder, superabsorbent, urea, release |
| 基金项目:陕西省自然科学基金(2015JM2071);中央高校基本科研业务费专项资金(2013G2291015) |
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| 中文摘要: |
| 以废弃沙棘枝糠粉为原料,丙烯酸(AA)和丙烯酰胺(AM)为单体,通过溶液聚合法合成了一种SBP/P(AA-co-AM)复合高吸水树脂。采用FT-IR和SEM对样品的结构和表面形貌进行表征。溶胀性能测试研究表明SBP/P(AA-co-AM)复合高吸水树脂在去离子水和0.9% NaCl溶液中的吸水倍率分别可达130.0 g/g和25.0 g/g,在60 ℃下仍具有较好的保水性能。以SBP/P(AA-co-AM)复合高吸水树脂在0.5 mol/L的尿素溶液中平衡溶胀后所得水凝胶(SRU)作为尿素在水溶液中的释放材料,实验考察了释放环境对尿素释放过程的影响,结果表明溶液介质温度越高,尿素的释放越快；酸性或碱性介质中,尿素的释放速率加快。 |
| 英文摘要: |
| The sea-buckthorn branch powder was used as the raw material for aqueous polymerization in the presence of acrylic acid (AA) and acrylamide (AM) monomers to prepare a SBP/P(AA-co-AM) composite superabsorbent, whose structure and morphology were characterized by FT-IR spectroscope and scanning electron microscope. The equilibrium swelling ratios in distilled water and 0.9% NaCl solution were investigated, and the results suggested that the composite hydrogel had the best absorbency of 130.0 g/g in distilled water and 25.0 g/g in 0.9% NaCl solution, as well as a good water retention at 60 ℃. The SBP/P(AA-co-AM) was swollen in urea solution (0.5 mol/L) until equilibrium swelling and then the hydrogel (SRU) was attained. The hydrogel was subsequently used as the release materials for urea in aqueous solution. The effects of release environment on the release process were investigated, verifying a promoted release rate at higher solution temperature or in acidic/alkaline media. |
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