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.