Surface modification of poly(vinylidene fluoride) (PVDF) membrane was accomplished by the adsorption of ferric hydroxide sol to impove its hydrophilicity. The adsorption curves of the membranes were analyzed by weight measurements, and the typical results showed a two-platform character in low concentration. The effects of the adsorption time, the ferric hydroxide sol concentration, the test temperature, as well as the water cleaning time on the adsorption amount were observed. Attenuated total reflection-Fourier transform infrared spectroscopy (ATR/ FTIR) analysis showed that the adsorption of ferric hydroxide sol on poly(vinylidene fluoride) microporous membranes (PVDFMM) is effective. The membranes hydrophilic performance was represented by water contact angle measurements. The water contact angles changes from the virgin 128°to the lowest value 81.90° in the range of 0~0.10 mol/L ferric hydroxide aqueous solution. The results indicated that ferric hydroxide sol can be immobilized on the PVDF films by adsorption, and the membrane hydrophilic performence increases with the increase of the adsorption amount of the ferric hydroxide sol onto the PVDF membrane surface.

The hydrophilic and mechanical strength of the cellulose acetate microporous membrane (CAMM) were improved by dealt with TiO2 nanoparticles, which were obtained by adding a super dispersant into TiO2-aqueous dispersion. The influence of such factors as temperature, processing time and TiO2 concentration on adsorption amount of CAMM were investigated. The experiment data indicated that water flux of the modified CAMM increased with the increase of the TiO2 adsorption amount. It suggested that hydrophilic of the CAMM was improved than that of blank. Experiments data also showed that the modified CAMM was better in mechanical strength but was weaker in elastic deformation than those of the blank. Water flux stability of the modified CAMM has improved significantly. Better modified conditions are as follows:TiO2 concentration 0.1mol·L-1,temperature 35°C, processing time 6h, and adsorption amount 9.708mg/g.

4-(β-sulfatoethylsulfone)-N-ethyl-aniline was synthesized from 4-(β-hydroxyethyl-sulfonyl)-N-ethyl-aniline in the presence of sulfuric acid using toluene andN,N-dimethyl-dodecylamine as mix solvent. The product was efficiently precipitated from the reaction mixture by addition of a sufficient amount of acetone. Several influencing factors on the esterification were investigated, and the results show that, the optimal conditions were: the molar ratio of 4-(β-hydroxyethylsulfonyl)-N-ethyl-aniline,N,N-dimethyl-dodecylamine and sulfuric acid was 1:1:1.5, the dosage of toluene 800 mL per molar 4-(β-hydroxyethylsulfonyl)-N-ethyl-aniline, and the esterification was taken for 9 hours under reflux. Under the optimal conditions, total yield of the product was 85% with the purity of 97%. It was also found that the yield of product can be promoted up to 90 % by using the recycled solvent. The structure of product was characterized by MS.