Scholarlink

<p>Implementing soil amendments is a viable strategy to alleviate the negative effects of drought stress. Superabsorbent polymers (SAPs) are promising soil amendments for mitigating drought stress by enhancing soil water retention and availability. In this study, a novel dual-backbone SAP composed of guar gum and sodium alginate grafted with acrylamide (GG/NaAlg-g-Am) was synthesized via microwave-assisted graft polymerization. Reaction parameters—including monomer, initiator, crosslinker concentrations, microwave power, and reaction time—were optimized to maximize grafting efficiency. Successful grafting and microstructural features were confirmed through FTIR and SEM analyses. Swelling studies revealed pH-dependent behaviour, with the highest equilibrium swelling (~ 900&#xa0;g/g) at neutral pH 7. Kinetic modelling indicated zero-order and Korsmeyer–Peppas model fits, suggesting sustained swelling through controlled fluid diffusion and matrix erosion. Soil amendment trials with 1% GG/NaAlg-g-Am demonstrated a 190% increase in water holding capacity, 32% increase in porosity, and 28% enhancement in soil organic matter, alongside biodegradability with a 110-day half-life. These results highlight the potential of GG/NaAlg-g-Am as a high-performance, sustainable SAP for soil conditioning applications. The aforementioned results validate the efficacy of GG/NaAlg-g-Am superabsorbent polymer as a soil amendment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Microwave-assisted grafting of dual-backbone guar gum/sodium alginate superabsorbent polymer: mechanistic insights into sustainable swelling kinetics and soil amendment potential

  • 期刊论文

  • 发表日期：

    2025年12月4日

查看全文
  • S. B. Shruthi,
  • G. N. Rameshaiah,
  • Pratik Roy,
  • R. R. N. Sailaja

摘要

Implementing soil amendments is a viable strategy to alleviate the negative effects of drought stress. Superabsorbent polymers (SAPs) are promising soil amendments for mitigating drought stress by enhancing soil water retention and availability. In this study, a novel dual-backbone SAP composed of guar gum and sodium alginate grafted with acrylamide (GG/NaAlg-g-Am) was synthesized via microwave-assisted graft polymerization. Reaction parameters—including monomer, initiator, crosslinker concentrations, microwave power, and reaction time—were optimized to maximize grafting efficiency. Successful grafting and microstructural features were confirmed through FTIR and SEM analyses. Swelling studies revealed pH-dependent behaviour, with the highest equilibrium swelling (~ 900 g/g) at neutral pH 7. Kinetic modelling indicated zero-order and Korsmeyer–Peppas model fits, suggesting sustained swelling through controlled fluid diffusion and matrix erosion. Soil amendment trials with 1% GG/NaAlg-g-Am demonstrated a 190% increase in water holding capacity, 32% increase in porosity, and 28% enhancement in soil organic matter, alongside biodegradability with a 110-day half-life. These results highlight the potential of GG/NaAlg-g-Am as a high-performance, sustainable SAP for soil conditioning applications. The aforementioned results validate the efficacy of GG/NaAlg-g-Am superabsorbent polymer as a soil amendment.