High performance and low cost composite superabsorbent based on polyaspartic acid and palygorskite clay
High performance and low cost composite superabsorbent based on polyaspartic acid and palygorskite clay
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基于聚天冬氨酸和凹凸棒石粘土的高性能、低成本复合超吸水剂
DOI：
10.1016/j.clay.2015.09.001
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发表时间：
2015-12-01
影响因子：
5.6
通讯作者：
Lei, Ziqiang
中科院分区：
文献类型：
--
作者：
Ma, Guofu;Yang, Qian;Lei, Ziqiang
通过在水溶液中自由基聚合接枝聚丙烯酸（PAA），成功制备了基于聚天冬氨酸（PAsp）和凹凸棒石（PGS）粘土的高性能、低成本复合高吸水剂（PAsp-g-PAA/PGS）。元素图、扫描电子显微镜和傅里叶变换红外分析表明凹凸棒石均匀分布并接枝到 PAsp-g-PAA 基质上。热重/差热分析证实复合超吸水剂具有较高的热稳定性。此外，我们还研究了pH值和盐对复合高吸水剂的溶胀和保水能力的影响。该复合超吸水剂具有高吸水性（在蒸馏水中为 1405 g/g）、pH 稳定性（pH 6-10）和耐盐性（在 0.9 wt.% 盐溶液中为 93 g/g）。复合超吸水剂的所有这些特性使其在农业、园艺和废水处理中具有更广泛的应用。 (C) 2015 Elsevier B.V. 保留所有权利。
A high performance and low cost composite superabsorbent (PAsp-g-PAA/PGS) based polyaspartic acid (PAsp) and palygorskite (PGS) clay is successfully prepared by free-radical polymerization grafting poly acrylic acid (PAA) in aqueous solution. Elemental map, scanning electron microscopy and the Fourier transform infrared analyses reveal the palygorskite evenly distributed and grafted onto PAsp-g-PAA matrix. Thermogravimetric/differential thermal analysis confirmed that the composite superabsorbent has high thermal stability. Furthermore, we investigated the affects of pH values and salts to the swelling and water-retention capability of the composite superabsorbent. The composite superabsorbent exhibits high water absorbency (1405 g/g in distilled water), pH-stability (pH 6-10) and salt tolerance (93 g/g in 0.9 wt.% salt solution). All of these properties of the composite superabsorbent make wider applications in agriculture, horticulture and wastewater treatment. (C) 2015 Elsevier B.V. All rights reserved.