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In fact, GO is a perfect candidate for fabricating novel superabsorbent hydrogels because of abundant hydrophilic groups on the surface [2–5]. It is easy for GO to form a good interfacial interaction with the hydrophilic matrix through chemical or hydrogen bonds. In addition, the thermal behavior and mechanical strength of the hydrogels may be enhanced owing to the outstanding thermal resistance and mechanical properties of GO sheets [4]. Moreover, it is expected that the swelling properties of the hydrogel nanocomposites may be improved due to the numerous hydrophilic groups on the surface of GO sheets. In this manuscript, we prepared a series of graphene oxide/poly(acrylic acid-co-acrylamide) (GO/P(AA-co-AM)) superabsorbent hydrogel nanocomposites via in situ radical solution polymerization. The effects of GO content on the chemical structure,morphology and miscibility of the super-absorbent hydrogels were studied by Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WXRD), dynamic mechanical thermal analysis (DMA), field emission scanning electron microscopy (FESEM) and optical microscopy (OM). Additionally, the swelling behaviors, swelling kinetics and pH-responsive behaviors of the hydrogels were also evaluated in details. A basic understanding of the swelling behavior for super-absorbent hydrogel nanocomposites in the solutions with different pH values (1–13) is essential for a successful research and application of the new materials |
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事实上, GO(氧化石墨烯 graphene oxide)是制作新型高吸水性树脂水凝胶的完美候选者,因为其表面具有丰富的亲水集团[2-5]。通过化学品或氢键GO和亲水骨架容易形成良好的界面交互作用。另外,由于GO片出色的热阻和力学性能,水凝胶的热性能和机械强度会提高。 [4]. 除此之外,由于GO片表面有很多亲水集团,预计纳米复合水凝胶的膨胀性质会提升。 在这份稿件中,我们准备了一系列石墨烯/聚(丙烯酸-丙烯酰胺共聚物), 超强吸吸水性树脂水凝胶纳米复合材料通过在原位自由基溶液中聚合。GO含量对化学结构的影响, 超强吸水性溶胶的形态和混溶性由利用下列方法研究:傅里叶变换红外光谱(FTIR), 广角x射线衍射(WXRD),动态力学热分析 (DMA), 场发射扫描电子显微镜(FESEM) ,光学显微镜(OM)。另外,也对水凝胶的溶胀行为、溶胀动力学和PH响应行为进行了细致的评估。 基本了解超强吸吸水性树脂水凝胶纳米复合材料在不同酸碱值(1–13)溶液中的溶胀行为,对研究成功和新材料的应用十分重要。 [ 发自手机版 https://muchong.com/3g ] |
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