Abstract In the present study, a novel environment-friendly hybrid nanocomposite of Banana Peel Cellulose-g-poly(acrylic acid)/PVA (BPC-g-PAA/PVA) hydrogel and Layered double hydroxides (LDH) nanosheets was developed using in situ graft polymerization for slow release of NP (nitrogen, phosphorous) fertilizers and water retention. The hybrid nanocomposite hydrogel containing NP fertilizers was characterized using FTIR, and SEM. The effects of pH changes and different saline solutions on the swelling behavior, fertilizer release and water retention properties of the nanocomposite were investigated. The nanocomposite hydrogel showed a pH dependent swelling, as in the pH range of 7–10, the hydrogel had higher water absorbency. However, pH had opposite effects on the release of fertilizers. Phosphorus release had an increasing trend from pH 2 to 7 and it reached its maximum value at normal pH while nitrogen had a higher release rate at acidic pH and by increasing pH from 2 to 7, the release of nitrogen decreased gradually. Water absorption and fertilizer release of hydrogel was influenced by different cations in the order of Ca2+

中文翻译：

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基于香蕉皮纤维素和层状双氢氧化物纳米片的新型控释氮磷肥杂化纳米复合材料的合成与表征

摘要 在本研究中，原位使用香蕉皮纤维素-g-聚（丙烯酸）/PVA（BPC-g-PAA/PVA）水凝胶和层状双氢氧化物（LDH）纳米片开发了一种新型环保杂化纳米复合材料。用于缓释 NP（氮、磷）肥料和保水的接枝聚合。使用 FTIR 和 SEM 表征含有 NP 肥料的混合纳米复合水凝胶。研究了 pH 值变化和不同盐水溶液对纳米复合材料的溶胀行为、肥料释放和保水性能的影响。纳米复合水凝胶显示出依赖于 pH 值的溶胀，因为在 7-10 的 pH 值范围内，水凝胶具有更高的吸水率。然而，pH值对肥料的释放有相反的影响。磷的释放量从pH 2 到7 有增加的趋势，在正常pH 下达到最大值，而氮在酸性pH 下释放率较高，随着pH 从2 增加到7，氮的释放逐渐减少。不同阳离子按Ca2+顺序影响水凝胶的吸水释肥