采用机械共混法制备了淀粉/丙烯酸钠（NaAA）/氯丁橡胶（CR）吸水复合材料,考察了去离子水和3.5%（质量分数）NaCl溶液两种吸水介质对其力学性能和吸水性能的影响,并且观察了复合材料吸水前后的微观形貌。结果表明浸水后,随吸水量的增加,材料力学性能的降低;复合材料在盐溶液中的吸水率远小于在去离子水中的吸水率;在反复使用过程中,能够很好地保持其原有的吸水性能,具有优异的反复使用性能;通过扫描电子显微镜（SEM）观察了复合材料吸水前后的微观形态结构,吸水组分聚NaAA颗粒吸水干燥后表面发生褶皱。
Stacrh/NaAA/CR water-absorbent composites were prepared by blending polychloroprene with starch, NaAA and vulcanizing agents. The effects of the different swelling mediums on mechanical properties and water absorbent properties of stacrh/NaAA/CR water-absorbent composites were investigated in deionized water and NaCl solution by changing the swelling medium. And the morphology of the composites before and after water absorption was observed by the scanning electron microscopy （SEM）. The results show that after water absorption, mechanical properties of the composites reduced with the increase in water absorbing capaci- ty. The water swelling ratios in deionized water were higher than those in NaCl solution. The composites which have excellent repeatedly used performance can maintain their original water absorbent properties by repeated used. The structure of the NaAA particles changed greatly before and after water absorption. NaAA was the main water absorbing component.
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