Scholarlink

<p>Modern adhesive technologies demand environmentally friendly solutions with high performance. This study explores the innovative use of polyacrylamide lactic acid modification (PAM-LA) as a water-soluble, pH-responsive glue to addresses the need through its enhanced adhesive properties and environmental safety. Polyacrylamide was modified with lactic acid to introduce carboxyl groups, significantly improving its adhesive capabilities via increased hydrogen bonding and electrostatic repulsion. Spectroscopic analyses (IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR) confirmed the successful incorporation of lactic acid into the polyacrylamide backbone. Viscosity measurements demonstrated unique behaviors, typical of polyelectrolytes, with a notable increase in viscosity upon dilution due to enhanced ionization of carboxyl groups. Potentiometric titration revealed that the amount of alkali required for titration was proportional to the modification time, indicating an increase in carboxyl groups. Key results show that the pH-responsive nature of PAM-LA allows for tunable adhesive properties, with higher pH levels leading to greater swelling and stronger adhesion. The rate constants for PAM-LA at different pH values were measured, with values such as 8.2 × 10<sup>−3</sup> at pH 1.68, 10.5 × 10<sup>−3</sup> at pH 6.85, and 15.5 × 10<sup>−3</sup> at pH 9.15, indicating increased reactivity and adhesion with rising pH. PAM-LA introduces a novel pH-responsive adhesive system by modifying polyacrylamide with lactic acid, enhancing its hydrogen bonding and electrostatic interactions for superior adhesion. Its primary application prospects include environmentally friendly, water-soluble glues for biomedical, packaging, and industrial uses where tunable adhesion is required.</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

Polyacrylamide lactic acid modification: a novel approach to preparation of a water-soluble and high-performance glue

  • 期刊论文

  • 发表日期：

    2025年7月25日

查看全文
  • Sevara Khazratkulova,
  • Mukhtarjan Mukhamediev,
  • Nodira Zokirova,
  • Basant Lal,
  • Mavjuda Rakhmatullaeva,
  • Dilroba Mukhammdieva,
  • Parida Mirkhamidova,
  • Elyor Berdimurodov,
  • Fotima Sobirova,
  • Ahmad Hosseini-Bandegharaei

摘要

Modern adhesive technologies demand environmentally friendly solutions with high performance. This study explores the innovative use of polyacrylamide lactic acid modification (PAM-LA) as a water-soluble, pH-responsive glue to addresses the need through its enhanced adhesive properties and environmental safety. Polyacrylamide was modified with lactic acid to introduce carboxyl groups, significantly improving its adhesive capabilities via increased hydrogen bonding and electrostatic repulsion. Spectroscopic analyses (IR, 1H NMR, 13C NMR) confirmed the successful incorporation of lactic acid into the polyacrylamide backbone. Viscosity measurements demonstrated unique behaviors, typical of polyelectrolytes, with a notable increase in viscosity upon dilution due to enhanced ionization of carboxyl groups. Potentiometric titration revealed that the amount of alkali required for titration was proportional to the modification time, indicating an increase in carboxyl groups. Key results show that the pH-responsive nature of PAM-LA allows for tunable adhesive properties, with higher pH levels leading to greater swelling and stronger adhesion. The rate constants for PAM-LA at different pH values were measured, with values such as 8.2 × 10−3 at pH 1.68, 10.5 × 10−3 at pH 6.85, and 15.5 × 10−3 at pH 9.15, indicating increased reactivity and adhesion with rising pH. PAM-LA introduces a novel pH-responsive adhesive system by modifying polyacrylamide with lactic acid, enhancing its hydrogen bonding and electrostatic interactions for superior adhesion. Its primary application prospects include environmentally friendly, water-soluble glues for biomedical, packaging, and industrial uses where tunable adhesion is required.