碳纳米管复合聚丙烯酸钠的制备及吸水性能

doi:10.11944/j.issn.1000-0518.2017.03.160237

摘要/Abstract

摘要：

以过硫酸铵(APS)为引发剂,N,N'-亚甲基双丙烯酰胺(MBA)为交联剂,采用水溶液聚合法制备了碳纳米管/聚丙烯酸钠高吸水树脂。系统考察了碳纳米管质量分数、引发剂、交联剂和聚合温度对树脂吸水性能的影响。结果表明,以单体丙烯酸质量为基准,当交联剂,引发剂和碳纳米管质量分数分别为0.04%、0.3%和0.3%,聚合温度75 ℃时,所合成树脂的吸水性能最佳。添加碳纳米管后树脂表面粗糙和形成孔结构导致了其吸水性能的变化,使得碳纳米管/聚丙烯酸钠的吸水量和吸水速率明显提高,其吸去离子水和生理盐水能力分别达到1423和104 g/g。该树脂重复吸水5次后,其吸水能力为1081.5 g/g,达到最大吸水倍数的76.0%。

关键词: 水溶液聚合, 碳纳米管, 聚丙烯酸钠, 吸水倍率

Abstract:

Carbon nanotubes(CNTs) composited sodium polyacrylate(PAA-Na) superabsorbent polymer was prepared by solution polymerization of acrylic acid(AA), where ammonium persulfate(APS) was used as an initiator, N,N'-methylene-bisacrylamide(MBA) as a crosslinker in the presence of carbon nanotubes. Effects of the amount of CNTs, initiator, crosslinker and the reaction temperature on water absorbency were studied. The results show that the synthetic resins have the best water absorbency when the mass ratio of the crosslinker to AA is 0.04%, the initiator to AA is 0.3%, the CNTs to AA is 0.3% and the reaction temperature at 75 ℃. After the addition of carbon nanotubes, the CNTs/PAA-Na shows rough surface and porous structure, which may lead to changes in water absorbency. The water absorbence and the swelling rate by the CNTs/PAA-Na are significantly improved than those by PAA-Na. The highest water absorbence of CNTs/PAA-Na reaches 1423 g/g and 104 g/g in distilled water and in saline water, respectively. The CNTs/PAA-Na composite maintains 76.0% of its water absorbency after repeated five times, and the water absorbent capacity is 1081.5 g/g .

Key words: solution polymerization, carbon nanotubes, sodium polyacrylate, swelling ratio

庄知博, 南照东. 碳纳米管复合聚丙烯酸钠的制备及吸水性能[J]. 应用化学, 2017, 34(3): 282-290.

ZHUANG Zhibo, NAN Zhaodong. Preparation and Swelling Properties of Carbon Nanotubes Composited Sodium Polyacrylate[J]. Chinese Journal of Applied Chemistry, 2017, 34(3): 282-290.

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