自愈水凝胶
肿胀 的
蒸馏水
丙烯酰胺
水溶液
化学工程
肺表面活性物质
化学
高分子化学
保水性
聚丙烯酰胺
单体
聚合
丙烯酸
聚合物
材料科学
有机化学
色谱法
土壤水分
生物化学
土壤科学
工程类
环境科学
作者
Guiru Liu,Xiaojuan Lai,Jin Liu,Xinping Dong,Lei Wang,Huaqiang Shi,Yasir Mukhtar,Xin Wen,Meiling Fan,Mingming Song,Yuyu Xue
标识
DOI:10.1016/j.colsurfa.2023.132403
摘要
Hydrogels are polymeric materials that can absorb and retain large amounts of water. They have various applications in agriculture, horticulture, oil recovery, and water management. However, conventional hydrogels have limited swelling (Q), equilibrium swelling (Q∞), and water retention capacities (DQ) under different environmental conditions. In this study, we synthesized a series of hydrophobically associated hydrogels by the aqueous polymerization of acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, and a novel amphiphilic hydrophobic monomer (RCS-10). Further, we investigated the effects of the RCS-10 content on Q, the mechanical properties, and water retention capacity (DQ) of the hydrogels. We also examined the influence of temperature, pH, salt type and concentration, and urea concentration on Q, finding that an increase in the RCS-10 content decreased Q and increased the DQ of the hydrogels. The hydrogels exhibited high Q in distilled water, low-salt solutions, and low-urea (1 wt%) solutions. In the latter, the Q∞ was as high as 768.99 g/g. The hydrogels also showed excellent cyclic swelling performance and maintained high Q∞ (759.99 g/g) after six cycles. Crucially, the hydrophobic association hydrogels demonstrated superior swelling and water retention properties compared to conventional hydrogels. Thus, the hydrogels have applications in water management in various fields including agriculture and horticulture.
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