A superabsorbent resin (SAR) with good degradability was prepared with acrylic acid (AA), acrylamide (AM), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), organic montmorillonite (OMMT) and titanium dioxide (TiO₂) through inverse suspension polymerization, using potassium persulfate (KPS) as initiator and N,N-methylenebisacrylamide (MBA) as crosslinker. The structure and micrographs of the SAR were fully characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD). Meanwhile, the effects of major factors such as initiator, crosslinker, OMMT and TiO₂ contents and the oil–water ratio on liquid absorbency were investigated, which reached 769.3 g/g in distilled water and 91.1 g/g in 0.9wt% NaCl solution, respectively. The equilibrium degradation performances were evaluated under the optimum conditions by the mass loss of the SAR in the soil and under the ultraviolet light, which reached 32.3wt% after 120 days and 83.9wt% after 40 h, respectively. The introduction of OMMT promoted the photodegradability obviously. The maximum photodgradation of PAA/TiO₂ SAR reached 74.3wt% after 60 h, which was lower than the PAA/OMMT/TiO₂ SAR. The degradable SAR has an encouraging potential for agricultural and forestry applications.

用丙烯酸（AA），丙烯酰胺（AM），2-丙烯酰胺基-2-甲基丙烷磺酸（AMPS），有机蒙脱土（OMMT）和二氧化钛（TiO ₂）制备了具有良好降解性的超吸收性树脂（SAR）。使用过硫酸钾（KPS）作为引发剂和N，N-亚甲基双丙烯酰胺（MBA）作为交联剂进行悬浮聚合。通过傅里叶变换红外光谱（FTIR），扫描电子显微镜（SEM），X射线衍射（XRD）对SAR的结构和显微照片进行了全面表征。同时，引发剂，交联剂，OMMT，TiO ₂等主要因素的影响研究了其含量和油水比对液体吸收性的影响，在蒸馏水中分别达到769.3 g / g，在0.9wt％NaCl溶液中达到91.1 g / g。在最佳条件下，通过土壤中SAR的质量损失和紫外光下的SAR质量损失来评估平衡降解性能，其在120天后达到32.3wt％，在40h后达到83.9wt％。OMMT的引入明显促进了光降解性。60h后，PAA / TiO ₂ SAR的最大光解量达到74.3wt％，低于PAA / OMMT / TiO ₂ SAR。可降解的SAR在农业和林业应用方面具有令人鼓舞的潜力。