Scholarlink

<p>In this study, carboxymethyl cellulose (CMC) in combination with polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP) cross-linked with either citric acid (CA) or glutaraldehyde (GA) has been proposed to prepare a noble hybrid hydrogel in different compositions. The introduction of high-frequency microwave irradiation is one of the most prominent features as a distinct comparison between microwave-assisted prepared hydrogels and the conventional hotplate heating method is evident here. The properties of all prepared hydrogels are investigated regarding swelling behaviour, swelling kinetics and gel fraction. The CMC hydrogel cross-linked with PVA and PVP using CA exhibited a high swelling capacity (769.23%), significant gel fraction and a rapid swelling rate constant (6.20&#xa0;min⁻¹) which adhered to second-order kinetics (<i>R²</i> ≈ 0.99). FTIR analysis confirmed ester linkage formation via a new peak at 1740&#xa0;cm⁻¹ in CA cross-linked samples while GA cross-linked hydrogels showed ether linkage at 1098&#xa0;cm⁻¹. SEM revealed interconnected porous structures and thermal analyses (TGA/DSC) demonstrated high thermal stability with an onset decomposition temperature of 281&#xa0;°C, glass transition temperature (T<sub>g</sub>) of 174.2&#xa0;°C and melting temperature (T<sub>m</sub>) of 210.8&#xa0;°C. XRD indicated reduced crystallinity (CrI = 30.26%) which confirmed successful hydrogel formation. Overall, the hydrogel formulations combining natural and synthetic polymers exhibited excellent physicochemical properties that support potential future applications.</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

Synthesis, characterization and swelling kinetics of empty fruit bunch date palm-based carboxymethyl cellulose blended PVA/PVP hydrogel via microwave radiation

  • 期刊论文

  • 发表日期：

    2026年5月4日

查看全文
  • Yousef M. Alanazi,
  • Abdullah Al Ragib,
  • Chun‑Yang Yin,
  • Mohamed Aboughaly,
  • Mohanad El‑Harbawi

摘要

In this study, carboxymethyl cellulose (CMC) in combination with polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP) cross-linked with either citric acid (CA) or glutaraldehyde (GA) has been proposed to prepare a noble hybrid hydrogel in different compositions. The introduction of high-frequency microwave irradiation is one of the most prominent features as a distinct comparison between microwave-assisted prepared hydrogels and the conventional hotplate heating method is evident here. The properties of all prepared hydrogels are investigated regarding swelling behaviour, swelling kinetics and gel fraction. The CMC hydrogel cross-linked with PVA and PVP using CA exhibited a high swelling capacity (769.23%), significant gel fraction and a rapid swelling rate constant (6.20 min⁻¹) which adhered to second-order kinetics (R² ≈ 0.99). FTIR analysis confirmed ester linkage formation via a new peak at 1740 cm⁻¹ in CA cross-linked samples while GA cross-linked hydrogels showed ether linkage at 1098 cm⁻¹. SEM revealed interconnected porous structures and thermal analyses (TGA/DSC) demonstrated high thermal stability with an onset decomposition temperature of 281 °C, glass transition temperature (Tg) of 174.2 °C and melting temperature (Tm) of 210.8 °C. XRD indicated reduced crystallinity (CrI = 30.26%) which confirmed successful hydrogel formation. Overall, the hydrogel formulations combining natural and synthetic polymers exhibited excellent physicochemical properties that support potential future applications.