Elaboration and characterization of biodegradable poly(aspartic-co-glutamic acid) hydrogels as soil additives with different crosslinkers

Youssef Hafidi, Hicham El Hatka, Dominik Schmitz, Markus Biel, Najim Ittobane
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Abstract

This work introduces a promising biodegradable copolymer synthesized through the fusion of D,L-aspartic acid (ASP) and L-glutamic acid (GA) utilizing melt polymerization. Employing infrared spectroscopy (IR), nuclear magnetic resonance spectroscopy (1H NMR, 13C NMR), and X-ray diffraction (XRD), the copolymer’s structural characterization highlights its distinctive physicochemical attributes. The synthesis, conducted with a facile and controllable melt polymerization method, yielded a remarkable product yield of up to 81%. The optimization of water absorption properties involved a meticulous exploration of various diamine cross-linking agents—hexamethylene diamine (HMD), lysine (LYS), and a synthesized tartaric acid dihydrazide (TD) derivative. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR), and scanning electron microscopy (SEM) were employed to confirm the copolymer’s structure, morphology, and cross-linking efficiency. The findings underscore exceptional water retention capabilities, with a peak swelling ratio of 11.874% achieved at a 10% concentration of hexamethylene diamine. Beyond advancing superabsorbent materials, this study contributes to mitigating environmental concerns associated with non-biodegradable alternatives.
作为土壤添加剂的可生物降解聚(天冬氨酸-共谷氨酸)水凝胶与不同交联剂的配制和特性分析
本研究介绍了通过熔融聚合法将 D,L-天冬氨酸(ASP)和 L-谷氨酸(GA)融合合成的一种前景看好的可生物降解共聚物。利用红外光谱(IR)、核磁共振光谱(1H NMR、13C NMR)和 X 射线衍射(XRD),该共聚物的结构表征凸显了其独特的物理化学属性。采用简便、可控的熔融聚合方法进行合成,产品收率高达 81%。为了优化吸水性能,对各种二胺交联剂--六亚甲基二胺(HMD)、赖氨酸(LYS)和合成的酒石酸二酰肼(TD)衍生物--进行了细致的研究。傅立叶变换红外光谱(FT-IR)、核磁共振光谱(NMR)和扫描电子显微镜(SEM)被用来确认共聚物的结构、形态和交联效率。研究结果表明,这种共聚物具有卓越的保水能力,当六亚甲基二胺的浓度为 10%时,其膨胀率峰值可达 11.874%。除了推动超吸水性材料的发展,这项研究还有助于减轻与不可生物降解替代品相关的环境问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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