Water-swellable hydrogel-forming porous cellulose beads (HFPCBs) were obtained from a single-step thermal reaction between urea and sodium dihydrogen phosphate dihydrate on porous cellulose beads (PCBs). The HFPCBs maintained the interconnected porous structure of the PCBs and featured a specific surface area of 36.5 m²/g. Fourier transform infrared spectroscopy analysis indicated the introduction of cellulose phosphate carbamate into the HFPCBs. At the optimum reaction composition and time, HFPCBs showed a maximum centrifuge retention capacity of approximately 50 g/g in deionized water. The swelling behavior of the HFPCBs followed the second-order kinetics model. Despite their highly porous structure, HFPCBs had a compressive strength of several tens of kilopascal in the swollen state. To demonstrate their potential application, the swollen HFPCBs were successfully used for the germination of plant seeds.

水溶胀性形成水凝胶的多孔纤维素珠（HFPCB）是通过尿素和磷酸二氢二钠二水合物在多孔纤维素珠（PCB）上的一步热反应获得的。HFPCB保持了PCB的互连多孔结构，比表面积为36.5 m ²/G。傅里叶变换红外光谱分析表明将磷酸氨基甲酸纤维素引入了HFPCB。在最佳的反应组成和时间下，HFPCB在去离子水中的最大离心保留容量约为50 g / g。HFPCB的溶胀行为遵循二阶动力学模型。尽管它们具有高度多孔的结构，但在膨胀状态下，HFPCB的压缩强度为几十千帕斯卡。为了证明其潜在的应用，已溶胀的HFPCB被成功用于植物种子的发芽。