中文摘要：

近年来，高吸水性树脂以其优异的性能在医用材料和生理卫生材料领域获得了广泛应用，如作为快速止血材料、卫生巾、尿布和卫生衬垫等。作为这类用途的树脂，必须具有较快的吸水速率。制备具有多孔结构的高吸水性树脂是提高树脂吸水速率的一种有效方法，目前国内外对多孔高吸水树脂的制备研究已有文献报道。对多孔高吸水树脂孔隙结构的研究对于深入了解其吸水机理，

英文摘要：

In this paper, an innovative method to study the structure of the porous superabsorbent polymers was studied. By using the Image J image processing software, the SEM pictures of the polymers were transformed into a binary sketch image. The structure parameters of the pores could also be calculated with the aid of the software. According to the principle of differential box counting, combined with the MATLAB programming, the fractal dimension of the porous superabsorbent polymers could be obtained through the binary sketch image. The calculated fractal dimension could be used to express the regularity of the complicated structure of the porous superabsorbent polymers. Via the above process, the influence of the pre-swelling time for the porous superabsorbent polymers, prepared through the cryogenic induced phase separation method, on the structure of the modified polymer was discussed.