In this investigation, a variety of innovative temperature/pH-sensitive hydrogels consisting of hemicellulose (extracted from APMP waste liquor) and acrylic acid/acrylamide monomers were synthesized via free radical polymerization for water retention agents and controlled release. The results showed that the hydrogel polymer was chemically cross-linked and entangled to form a three-dimensional network structure, and the monomer successfully grafted on the hemicellulose chain. The content of crosslinkers and monomers had obvious effects on the swelling ratio of hydrogel. The sensitivity of the hydrogel was determined according to the change of the swelling ratio of the hydrogel under different temperature and pH conditions, combined with the chemical structure analysis of the hydrogel, and explain its sensitivity mechanism. Finally, after 6 days at 25 °C and pH 6, the swelled hydrogel still retained 79.46 % of the moisture, which proved that it has high water retention ability.

在这项研究中，由半纤维素（从APMP废液中提取）和丙烯酸/丙烯酰胺单体组成的各种创新的对温度/ pH敏感的水凝胶通过自由基聚合反应合成了保水剂和控释剂。结果表明，水凝胶聚合物化学交联并缠结形成三维网络结构，单体成功接枝到半纤维素链上。交联剂和单体的含量对水凝胶的溶胀率有明显的影响。根据水凝胶在不同温度和pH条件下溶胀率的变化，结合水凝胶的化学结构分析，确定了水凝胶的敏感性，并解释了其敏感性机理。最后，