Modified attapulgite (ATP-PS) grafted with polystyrene (PS) was prepared based on Pickering emulsion polymerization. The characterization of ATP-PS was studied by transmission electronic microscopy (TEM), X-ray photoelectron spectrometer (XPS), Fourier transform infrared spectrometer (FTIR) and contact angle analysis. TEM analysis showed that the surface of ATP-PS was coated with PS organic layer; XPS analysis showed that the proportion of C element in ATP-PS was much larger than that of ATP; FTIR analysis found that ATP-PS had more PS specific functional group peaks than that of ATP; Moreover, contact angle results showed that the hydrophobicity of ATP-PS was significantly improved compared with ATP. The above characterization analysis proved that the modification of ATP-PS was successful. Moreover, polyphenylene sulfide (PPS) hydrophobic porous membrane was prepared with 1-chloronaphthalene and dibutyl phthalate as mixed diluents and ATP-PS as additives. The results showed that 0.8 wt% of ATP-PS had a great effect on the structure and performance of the membrane. With the increasing of the mass proportion of ATP-PS in the preparation of PPS base membrane, the microstructure of PPS based membrane was changed from blocky bicontinuous to spherical granular bicontinuous. When the addition amount of ATP-PS was 0.8 wt% of the total mass of PPS base membrane, PPS based membrane had strong hydrophobicity and organic solvent affinity, and its n-butanol flux could reach 106.9642 L m(-2) h(-1) bar(-1). The rheological properties of PPS based membrane showed that ATP-PS was well compatible with the PPS, and ATP-PS was beneficial to crosslink between PPS molecular chains, thereby increasing the mechanical properties of PPS based membrane. Phase transition analysis demonstrated that ATP-PS (0.8 wt%) increased the melting temperature (2.34 degrees C) and crystallization temperature (2.63 degrees C) of PPS based membrane compared to PPS, thus allowing PPS to complete the phase transition at higher temperature interval during film formation, resulting in a stable microscopic cluster structure. Based on hydrophobic porous PPS membrane, PPS/ATP-PS/TA nanocomposites membrane with ATP-PS selective layer was prepared by co-deposition of tannic acid (TA) and ATP-PS on the surface of PPS membrane. The performance of PPS/ATP-PS/TA nanocomposites membrane was studied, which showed that the n-butanol flux of PPS/ATP-PS/TA nanocomposites membrane was 61.2913 L m(-2) h(-1) bar(-1). More importantly, the simulated filtration performance of MB dye organic waste liquid (the solvent is n-butanol) showed that the maximum rejection rate of MB dye reached 99.82%. These results demonstrate that PPS/ATP-PS/TA nanocomposites membrane will have potential application in the filtration of organic dye wastewater.
