The superabsorbent polymers (SAPs) containing up to 30% w of N -succinylchitosan and N -maleoylchitosan were successfully synthesized by free radical polymerization in an aqueous solution. The structures and surfaces of the synthesized SAPs were characterized by FTIR and SEM, respectively. The influence of the parameters such as type and content of polysaccharide, cross-linker, and comonomer mixture content on the swelling rate was researched. The chitosan-derivative-based SAPs have a higher swelling rate compared to chitosan-based SAPs. Equilibrium swelling rate, Q e , of the synthesized SAPs lying in the range 102–1144 g/g decreases with the rise of polysaccharide content. It was found that N -succinylchitosan-based SAPs are characterized by higher Q e values compared to N -maleoylchitosan ones. The highest swelling rate ( Q e = 1144 g/g) was achieved for N -succinylchitosan-based polymer containing 2% w of N -succinylchitosan, 0.5% w of cross-linker, and acrylamide-acrylic acid weight ratio was 1:3. Researching the swelling kinetics shows equilibrium swelling is reached during 0–30 min for all synthesized polymers, and equilibrium reaching time rises with the increase in polysaccharide content. Also, swelling is correctly described by the pseudo-second-order model and controlled by chemical absorption of water molecules. The synthesized eco friendly SAPs enriched in polysaccharide content are characterized by excellent water-absorbing properties.

中文翻译：

---

富含具有优异吸水性能的壳聚糖衍生物的超吸水剂的合成

通过在水溶液中自由基聚合成功合成了含有高达 30% w N-琥珀酰壳聚糖和 N-马来酰壳聚糖的高吸水性聚合物 (SAPs)。合成的 SAPs 的结构和表面分别通过 FTIR 和 SEM 表征。研究了多糖的种类和含量、交联剂、共聚单体含量等参数对溶胀率的影响。与基于壳聚糖的 SAP 相比，基于壳聚糖衍生物的 SAP 具有更高的溶胀率。随着多糖含量的增加，合成的 SAPs 的平衡溶胀率 Q e 在 102-1144 g/g 范围内降低。发现基于 N-琥珀酰壳聚糖的 SAP 的特征在于与 N-马来酰壳聚糖相比更高的 Q e 值。含有 2% w N-琥珀酰壳聚糖、0.5% w 交联剂和丙烯酰胺-丙烯酸重量比为 1:3 的 N-琥珀酰壳聚糖基聚合物的溶胀率最高 (Q e = 1144 g/g) . 对溶胀动力学的研究表明，所有合成的聚合物在 0-30 分钟内达到平衡溶胀，平衡达到时间随着多糖含量的增加而增加。此外，膨胀由伪二阶模型正确描述，并由水分子的化学吸收控制。合成的富含多糖的生态友好型 SAPs 具有优异的吸水性能。对溶胀动力学的研究表明，所有合成的聚合物在 0-30 分钟内达到平衡溶胀，平衡达到时间随着多糖含量的增加而增加。此外，膨胀由伪二阶模型正确描述，并由水分子的化学吸收控制。合成的富含多糖的生态友好型 SAPs 具有优异的吸水性能。对溶胀动力学的研究表明，所有合成的聚合物在 0-30 分钟内达到平衡溶胀，平衡达到时间随着多糖含量的增加而增加。此外，膨胀由伪二阶模型正确描述，并由水分子的化学吸收控制。合成的富含多糖的生态友好型 SAPs 具有优异的吸水性能。