Nita Kusumawati, Asri Wijiastuti, Agus Budi Santoso
Generally, the purpose of this research is to improve the hydrophilic properties of polyvinylidene fluoride membranes (PVDF) by blending technology using a hydrophilic polymer, chitosan. More specifically, this research aimed to determine the physical characteristics (morphology and size of porous) of PVDF membrane blended chitosan and the influence of chitosan concentration and stirring temperature of a membrane casting solution against mechanical strength and the performance of the membrane in treatment process of batik indsutrial wastewater treatment. In this research, the preparation of PVDF-chitosan composite membrane is carried out using the phase inversion method with immersion -precipitation techniques. Furthermore, to know the surface and cross-section morphology, and also pore size of PVDF-chitosan composite membrane, conducted the analysis using scanning electron microscopy (SEM) and surface area analyzer (SAA) instruments. Results of an analysis showed that the PVDF-chitosan composite membrane surface derived from a casting solution with low levels PVDF and higher stirring temperatures, will have pore with broad area, pore volume and pore size are more tenuous compared with PVDF-chitosan composite membrane surface resulting from the casting solution with high levels of PVDF and lower stirring temperature. In the meantime, to find out the mechanical strength of the PVDF-Chitosan composite membrane, was using autograf instruments. Mechanical strength measuring results, indicating that the mechanical strength of PVDF-Chitosan composite membrane are in the range of 476,02 N/m2 - 1,963.35 N/m2. The mechanical strength of the PVDF-Chitosan composite membrane will increase, with increasing levels of PVDF in casting solution and decreasing levels of temperature stirring was applied. As for knowing the permeability of PVDF-Chitosan composite membrane in the treatment of batik industrial wastewater, has conducted the analysis using "Dead end" membrane reactor. The permeability measurement results, show that the PVDF-Chitosan composite membrane have flux on the range 1,244.66 L/m2.hour-2,990.45 L/m2.hour. The permeability of the PVDF-Chitosan composite membrane will increase, with increasing levels of PVDF in casting solution and temperature stirring was applied.
Chemistry Departement, Surabaya State University, Surabaya, Indonesia; Exceptional Education Departement, Surabaya State University, Surabaya, Indonesia; Electrical Engineering Departement, Surabaya State University, Surabaya, Indonesia
